Client-Side Only Tools

Virtual whiteboard for sketching hand-drawn like diagrams. Supports real-time collaboration, export to PNG/SVG, and has a library of shapes and icons.

The Cyber Swiss Army Knife — encode, decode, encrypt, compress, and analyze data with a drag-and-drop recipe builder.

A browser-based display toolkit that turns any screen into a LED sign, light effect, sound visualizer, clock, QR code, or camera filter. Supports dozens of themes and modes — no app, no account, just a URL.

Open-source browser-based audio editor with waveform visualization, cut/copy/paste editing, and effects including normalize, fade in/out, reverse, and amplify. Processes audio entirely in your browser — no uploads to any server.

Datasette running entirely in your browser via WebAssembly (Pyodide). Upload SQLite databases or CSV files and explore them with a full SQL interface — no server, no account, and your data never leaves your device. Built on the popular Datasette data exploration framework by Simon Willison.

QuixCalc is a free collection of 60+ online calculators and tools, from finance to home projects, that run right in your browser.

A URL-based time tool that lets you create countdowns, countups, clocks, and recurring cycles — all embedded in the link itself. No signup required, just craft your URL and share it. Supports multiple themes and time units.

Advanced online image editor that supports PSD, XCF, Sketch, XD, and CDR formats. Works like Photoshop directly in your browser with layers, filters, and advanced editing tools.

Google-built image compression tool that runs entirely in the browser. Compare original vs compressed side-by-side, supports WebP, AVIF, MozJPEG, and more.

Online regex tester and debugger for PHP, PCRE, Python, Golang, and JavaScript. Build, test, and debug regex patterns with real-time explanation and match highlighting.

Combines multiple API documentations in a fast, organized, and searchable interface. Covers JavaScript, HTML, CSS, Node.js, Ruby, Python, and hundreds more.

Create and share beautiful images of your source code. Choose from dozens of syntax themes, languages, and export to PNG or SVG.

Free dynamic mathematics software for all levels of education. Combine geometry, algebra, spreadsheets, graphing, statistics, and calculus in one interactive tool.

Write, compile, and run TypeScript code in the browser. Official Microsoft tool with full type checking and IntelliSense.

Local-first browser tools for developers: JSON formatting, JWT decoding, URL query parsing, chmod/umask calculators, cron helpers, timestamps, hashes, UUIDs, and more. No login required; tool inputs are processed in the browser where possible.

Crochet Chart Maker is a free browser tool that turns JPG, PNG, or WebP images into editable color pixel grids, or starts from a blank grid. Adjust size, fit or crop, reduce colors, edit individual squares, and download a high-resolution PNG with numbers and a color legend. Images stay on your device, and the core tool requires no account.

Merge multiple PDF files into one directly in your browser — no upload, no signup. Files are processed entirely client-side using your device's own processing power, so nothing ever leaves your computer. Drag, drop, reorder, and download instantly.

A collaborative digital whiteboard with a clean, minimal interface. Draw freehand, add shapes, arrows, text, and sticky notes to create diagrams and visual notes.

Advanced graphing calculator implemented as an interactive web application. Plot functions, create tables, add sliders, animate graphs, and explore math visually.

Free, browser-based diff checker for text and code — paste two versions and see every added, removed, and changed line, with word-level highlighting. Nothing uploaded.

100+ free online tools that run entirely in your browser. PDF merge, split, compress, convert. Image compression, format conversion, resize. JSON/YAML formatters, markdown editors, token counters, color pickers, unit converters, and more. No file uploads to remote servers — your data never leaves your device. No account, no tracking, no cookies. All processing happens client-side via JavaScript/WebAssembly. Works offline after first load. Built for privacy: what you do in the browser stays in th

Website that has a bunch of free tools with no watermark, no ads and files stay on your device using local processing.(100% free)

Free browser-based image and design tools. Everything runs locally in the browser using WebAssembly, so files are never uploaded to a server. No account needed. Tools include an image compressor (JPEG/PNG/WebP/AVIF), format converters, an Adobe Illustrator .ai viewer and converter (.ai to SVG/PNG/PDF) that works without Illustrator installed, a GIF maker, image splitter, halftone and noise texture generators, a seamless pattern checker, a color picker, DPI changer and unit converters.

Free online chord progression generator. Pick a key and mood, press play, and start writing. No sign-up.

Mailward opens Outlook PST and OST archives, Outlook for Mac OLM exports, MBOX mailboxes (including Gmail Takeout) and EML/MSG messages directly in the browser. The file is parsed locally in a Web Worker and never uploaded, and there is no account for anything. Reading and search are free; batch export and opening a second archive side by side are a one-time $19 license. Works on Mac, Windows, Linux and ChromeOS without Outlook installed.

AllSubConverter is a free browser-based subtitle toolkit for converting, editing, cleaning, syncing, checking and exporting subtitle files. It supports SRT, VTT, ASS, SSA, LRC and more, with batch workflows and quality checks.

Writing assistant that highlights complex sentences, passive voice, adverbs, and hard-to-read phrases. Helps make your writing bold and clear.

Cloud-enabled, mobile-ready, offline-storage compatible Markdown editor. Preview rendered Markdown in real-time as you type.

Up-to-date browser support tables for web technologies including HTML5, CSS3, SVG, and JavaScript APIs. Essential reference for web developers.

Online JSON formatter, validator, and viewer. Paste or upload JSON data to format, validate, minify, and convert between JSON and other formats.

Free and easy-to-use online PDF tools: merge, split, compress, convert, rotate, watermark, and more. All processing happens in the browser.

Customizable Pomodoro timer that works on desktop and mobile. Track your focus sessions, set custom durations, and manage tasks with a clean interface.

Visualize JSON data into interactive graphs. Seamlessly explore complex JSON structures with a tree-like graph view, search, and filter capabilities.

Convert between table formats: Excel, CSV, JSON, HTML, SQL, Markdown, LaTeX, and more. Edit tables visually and export in your preferred format.

Official SEC compound interest calculator. Estimate how your savings or investments could grow over time with compound interest. Simple, trustworthy, no ads.

Generate harmonious color palettes instantly. Press spacebar to create beautiful color schemes for your design projects.

Optimize and compress SVG files with a visual interface. Built by Jake Archibald, powered by SVGO.

Visual cron expression editor with human-readable explanations. Quickly build and validate cron schedules.

Visual time zone converter for scheduling across time zones. Compare multiple cities side by side to find the best meeting time.

Create hand-drawn style presentation slides using the Excalidraw engine. Build unique, sketch-like slide decks.

Comprehensive browser fingerprinting test suite. Check what information your browser reveals: IP, WebRTC, Canvas, fonts, and more.

Minimalist, customizable typing speed test. Track WPM, accuracy, and consistency with multiple test modes and themes.

All-in-one browser image optimizer. Chain compress, resize, convert, crop, remove background, and watermark in a single pipeline — no upload wait, no signup. Everything runs client-side via WebAssembly. 15+ formats, batch processing, instant results.

Open-source browser tool that generates customizable privacy hardening scripts for Windows, macOS, and Linux. Browse 900+ organized tweaks — disable telemetry, advertising IDs, data collection services, and more — select what you want, and download a ready-to-run script. All script generation runs client-side: no account, no uploads, nothing leaves your browser.

A browser-based WordPad editor for writing, formatting and saving notes without installing software or creating an account.

TextKit — 19 free browser-side text tools (word counter, JSON formatter, case converter, URL slug generator, text diff, find & replace, email extractor, markdown table builder, sort/dedupe/shuffle, and more) plus 23 in-depth guides. No signup. No tracking. Nothing leaves your browser. https://textkit.tech

Free privacy-first browser tool for converting iPhone HEIC/HEIF photos to JPG. It works without signup or uploads, supports batch conversion, adjustable JPG quality, previews, and ZIP downloads.

Free no-login browser tools for PDF, image, QR, and paperwork tasks. Compress images to KB targets, resize photos, convert images to PDF, make QR codes, and generate simple PDFs without creating an account.

Free browser-based developer utilities for JSON formatting, Base64 encoding, regex testing, UUID generation, color conversion, and everyday coding tasks.

QuickBGCut removes image backgrounds online for free. Upload JPG, PNG, or WebP images and download a transparent PNG; processing runs locally in the browser with no signup, no watermark, and no server upload.

A free online decibel meter that measures sound levels in your browser using your microphone (nothing is recorded or uploaded). It also includes a free online hearing test, a hearing-age tone test, a CDC/NIOSH-sourced decibel chart of common sounds, and a US city noise map built from federal data.

Tools Berry is a free collection of fast, no-login online tools — paycheck and take-home-pay calculators for all 50 US states, plus image resizing and compression, QR and password generators, invoice and word-count tools, and dozens of everyday calculators. Everything runs in your browser — no signup, no uploads.

A free hub of no-signup, no-login tools that run right in the browser, made by an independent Australian children's publisher for parents and teachers. Includes a maths worksheet generator with answer key, name tracing and spelling worksheet generators, a word search maker, an award certificate maker, routine and chore chart makers, a bingo card maker, and a flashcard maker. Print a class set in seconds. Nothing to install and no email required.

64 free PDF and image tools that run entirely in your browser, so your files are never uploaded. Merge, split, compress (to an exact target size), convert, organize, sign and protect PDFs; compress, resize, convert across ~20 formats, run OCR, and remove image backgrounds with an on-device AI model. No account, no limits, no watermarks. Proof: open the Network tab while you process a file and it stays empty, and most tools keep working with Wi-Fi off after the page loads.

JotTools is a free suite of 130+ online tools (PDF, image, text, color, calculators, and developer utilities) that run entirely in your browser. No login, no signup, and nothing is uploaded to a server, all processing happens client-side on your device. Available in 6 languages.

A free collection of 14 browser-based web tools for developers and designers: batch image converter & optimizer, CSS and SVG generators, QR code generator, data extractor, email template tester, agile boards and more. Every tool runs 100% client-side.

A free browser-based diff checker for text, code, JSON and documents. It shows line, word and character changes while keeping the content on the user's device.

Browser SOP Builder is a single-purpose worksheet for drafting controlled procedures from rough process notes. It captures owners, triggers, numbered actions, completion criteria, quality checks, and exception paths, then previews and exports Markdown. Inputs stay in browser memory.

Free browser-based image utility for reducing JPG, PNG, and WebP files to a selected KB limit. It supports batch processing, measured output previews, and local processing without uploading files to the website server.

A free, shareable countdown timer — the deadline is encoded in the link itself, so everyone who opens it sees the identical countdown in sync. No account, no server.

64 free text tools in one page — case conversion, cleanup, encoding, hashing, generators — all running entirely in your browser. Nothing uploaded.

Music Tools Lab is a free collection of browser-based utilities for musicians and audio workflows, including BPM and key detection, metronomes, tuners, playlist analysis, audio conversion, trimming, and vocal reduction. Core audio processing runs locally in the browser, so selected files are not uploaded, and no account is required.

UtilBear offers free, privacy-first tools for counting text and converting WebP and HEIC images. Processing happens locally in the browser, so files are never uploaded. No account or watermark is required, the tools work on desktop and mobile, and the interface supports eight languages.

Free browser-based photo privacy tool that automatically detects and blurs faces. Processing happens locally in the browser, so images are not uploaded. Supports batch processing and EXIF metadata removal.

Free image compressor for JPG, PNG, and WebP. Images are processed locally and never uploaded. It supports batches of up to 40 images, before-and-after comparison, individual JPEG and WebP quality controls, PNG colour reduction, separate downloads, and ZIP export. No account required.

Free question generator with 3,750+ conversation starters across 34 categories: deep talk, funny, dating, party games (Would You Rather, Truth or Dare, Never Have I Ever), team building, and more. Pick a category and generate random questions instantly, no signup.

A free tool that instantly capitalizes titles and headlines according to AP, APA, MLA, and Chicago style guides. Includes reference guides for book titles, essay titles, resumes, social media captions, and more. No account or login required.

Nawtch is a free fitness and nutrition tracker that runs entirely in your browser. Log food, calories, macros, cost per serving, weight, and workout programs — all stored locally via IndexedDB, nothing sent to a server. No account, no email, no signup wall of any kind. Includes evidence-based calculators (TDEE, BMR, BMI, body fat %) with cited sources, and a diet comparison page with real study links. Monetized only by non-intrusive banner ads — no popups, no paywalled features.

Free online productivity timer suite: Pomodoro timer, countdown timer, stopwatch, task estimator, habit tracker, and focus session log. No account or login required, works instantly in the browser.

27 free browser tools for people who sell on Etsy, Amazon and print-on-demand: fee and landed-cost calculators, image resizers, print-file checkers, seamless pattern makers, label builders and more. Every tool runs in the page — images and files are processed on your own machine and never sent to a server. No account, no trial, no upload step. 34 written guides cover the marketplace specs and 2026 EU/US regulations the tools deal with, with sources and dates cited.

Free browser-based tool to inspect and remove supported EXIF, GPS, XMP, IPTC and AI metadata from JPG, PNG and WebP images. Files stay local and no account is required.

A collection of free browser image tools for conversion, compression, resizing, editing, metadata inspection, and export. Images remain on-device and there is no signup or watermark.

Convert images, video, audio and documents right in your browser. HEIC to PNG, MP4 to GIF, DOCX to PDF and over 200 other format pairs. Files are processed on your own device and are never uploaded to a server, so nothing leaves the tab. No account and no install; a typical conversion finishes in one to three seconds.

Merge, reorder, and compress PDF files directly in your browser. The core workflow requires no account, adds no watermark, and processes files on your device.

Translate text to Morse code and Morse code to text instantly in your browser.

LensUp is a free online document scanner that runs entirely in your browser. Photograph a document and turn it into a clean, printable PDF: crop and fix perspective, flatten shadows, compress toward a target size, add an optional watermark or signature, and place an ID card's two sides on one sheet. No app, no sign-up, no forced watermark, and your files are never uploaded. 20 languages. https://lensup.ai/

Free browser tools, no signup: Thai alphabet/flashcards/worksheets/reading, verified OSINT link list, Bern brunch guide, unit converter, shareable countdown, ASCII reference, smiley composer. Mostly client-side on a static host.

Generate and validate CAA (Certificate Authority Authorization) DNS records. Pick allowed CAs, add wildcard rules and iodef violation reporting, plus a raw-record parser/validator. Runs entirely in your browser, no signup.

Check Shopify product CSVs before import. CSV SafeCheck flags missing required columns, invalid values, duplicate handles, option and SKU risks, and formula-like cells. Deterministic safe fixes and reports are generated locally in your browser, with no upload, account, tracker, or cookie.

Privacy-first browser tools for creating, scanning and checking static QR codes. Create QR codes for URLs, Wi-Fi, contact details and more without signup, watermark or artificial expiry.

A free, 100% browser-based suite of image, PDF, audio and video tools (resize, compress, convert, merge PDFs, background removal, and more). Everything runs client-side via Canvas API, ffmpeg.wasm, pdf-lib and TensorFlow.js -- no upload to a server, no account needed.

A free browser tool that removes GPS, EXIF, and other non-pixel metadata from JPEG, PNG, and WebP images locally on the device before sharing.

Free browser-local theme builder for Codex Desktop — turn any wallpaper into a readable custom theme.

Free browser-based chord finder that reads chord progressions, song key and tempo from audio files. Processing runs locally on the user's device; audio is not uploaded, and no account is required.

GizmoBench is a collection of free browser tools for everyday tasks, including calculators, converters, JSON and Markdown utilities, image and audio tools, 3D viewers, and hardware checks. Every core tool works without an account. File tools process documents and images on your device without uploading them, and each tool explains its processing limits. IP address lookup uses the GizmoBench server.

Generate and hear pure tones from 20 Hz to 20,000 Hz in the browser, choose sine, square, triangle, or sawtooth waves, adjust volume and balance, use presets, copy a link, or save a WAV without signing up.

Free browser-based cURL-to-code converter with 23 languages and 40 language/library options. Paste a Bash-style cURL command and copy generated code for Python, JavaScript, Go and more. No account required. Commands stay on your device and no requests are sent. Optional usage analytics requires consent.

13 free browser-based tools — image compressor, JSON formatter, word counter, password generator, Base64/URL encode-decode, and more. Everything processes entirely client-side, with nothing uploaded to a server. Also includes an optional Batch Image Compressor (compress many images at once) for a one-time $4.99 payment via PayPal — no account or subscription required.

Free invoice generator for freelancers. No signup, no account, nothing uploaded. Invoices are built in your browser tab and PDFs download straight to your device. It remembers you on-device: business auto-fill, client autocomplete, one-click invoice duplication with auto-incremented numbers, and paid/unpaid tracking. Includes an AI agent kit: prefill links any AI assistant can generate.

Convert Apple HEIC/HEIF photos into PDF files entirely in the browser tab. Nothing is uploaded to a server. Batch-convert several photos at once, or merge them into a single multi-page PDF with page order, size (original / A4 / US Letter) and orientation all adjustable before export. No account, no install — open the page and drop the files in.

Compress JPG, PNG, WebP and HEIC images to a chosen maximum file size in KB. Files are processed locally in the browser, with optional pixel resizing and individual or batch ZIP downloads. Free and no signup.

Opens Audacity project files (.aup4 from Audacity 4, .aup3 from Audacity 3) directly in the browser: see every track and clip, play the mix, export WAV or MP3, run a recovery report on a damaged project, and downgrade an .aup4 so Audacity 3.7 opens it again. The project is parsed locally with SQLite compiled to WebAssembly and never uploaded. Free to open, play and export the mix; rebuild, downgrade and stems are a one-time $19 license. No account for anything.

Image Convert is a free browser-based suite for seven practical image tasks: convert HEIC or HEIF to JPG or PDF, convert JPEG, PNG, and WebP, compress to a target size, resize, crop, and add text watermarks. Selected files and generated outputs are processed on the device and are not uploaded for processing. No sign-in is required.

An educational BigInt mathematical solver that visualizes Shanks's baby-step giant-step algorithm for the discrete logarithm problem step-by-step in the browser.

A client-side text converter that transforms plain English into 1337 leet speak and decodes leet representations back into standard text with customizable mapping modes.

Convert images, documents, audio, and video directly in the browser with no file uploads and configurable quality settings.

Collection of over 3,000 free calculators for math, physics, finance, health, and everyday life. Each calculator explains the formulas and concepts behind it.

Open-source tests of web browser privacy. Compares tracking protection, fingerprinting resistance, and other privacy features across major browsers.

Online tool for converting between CSV, JSON, and SQL formats. Also includes data cleaning and transformation utilities. All processing happens in the browser.

Create beautiful code screenshots with customizable themes, backgrounds, and padding. By Raycast.

Free browser-based geometry formulas and calculators for common 2D and 3D shapes. Includes area, perimeter, volume, surface area formulas, diagrams, worked examples, and step-by-step calculator outputs without requiring an account.

Free loan amortization calculator for mortgages, auto loans, and personal loans, with instant payment schedules and principal/interest breakdowns.

Free health and fitness calculators for calories, BMR, BMI, body fat, macros, and nutrition planning, usable directly in the browser.

Format, validate, and beautify JSON instantly in your browser. Toggle between pretty-print (2-space indent) and minify. Syntax errors show exact line and column. Uses native JSON.parse() — no data is ever sent to a server. Free, no account needed.

A free, browser-based tool to check whether your game controller works correctly. Connect any gamepad over USB or Bluetooth and instantly see button presses, analog stick movement, trigger travel and rumble. Unlike raw input viewers, it returns a clear stick-drift verdict — pass or fail. Works with Xbox, PlayStation (DualSense / DualShock) and Switch Pro controllers. Runs entirely in your browser; no input data ever leaves your device. No signup, no install.

Audit a local repository for AI coding-agent readiness without uploading source code. The static, open-source browser tool checks bounded configuration and documentation evidence for instructions, hooks, CI, tests, ownership, dependency locking, and secret hygiene, then reports a score and concrete gaps. No login, cookies, analytics, ads, or network processing.

Full retirement planner with no login: year-by-year projections, Roth conversion optimizer, and Monte Carlo simulation — all computed in your browser. Nothing to sign up for; your plan is stored locally on your device.

Convert video, photos, or existing GIFs into GIFs, silent MP4s, or APNGs entirely in your browser. Nothing uploads: the whole pipeline runs in the tab, and the site Content-Security-Policy blocks cross-origin sends, so the no-upload claim is enforced by the browser rather than promised in a privacy policy. Frame-accurate trimming, up to 10 clips on a timeline, captions, per-clip reverse, filters, and a built-in optimizer. Free and ad-supported, no account, no watermark, nothing to install.

Transfert gratuit de fichiers volumineux entre ordinateurs et téléphones depuis le navigateur. Partage par lien, QR code ou code de retrait à 8 caractères, sans inscription ni installation.

Free, no-signup habit tracker built for developers

A free online tool to alphabetize lists and sort text. Paste any list of names, words, or lines and sort it A-Z or Z-A instantly, with options for case sensitivity, removing duplicates, and sorting by column. Also includes 20+ pre-built reference lists (baby names, sports teams, countries, elements, and more) already sorted alphabetically.

A bilingual Quebec web app that helps self-represented people organize dated facts, evidence, communications, deadlines and chronology into a structured legal-file report. Data stays on the device during no-login use. It provides organization and general information, not legal advice.

Calculate LLM context-window VRAM, KV cache per token, total GPU memory, and maximum context with GQA or MQA, FP16, FP8, Q4, concurrency, and GPU-budget controls.

Free browser-based text formatting tool. Fix smart quotes and curly quotes, convert CSV to HTML tables, count words and characters, and format JSON. Everything runs client-side, no upload and no account needed.

Free calculator for image and video aspect ratios. Enter dimensions to find the ratio, or pick a preset (16:9, 4:3, 1:1) to calculate matching resolutions. Also handles pixel density and side-by-side ratio comparisons. No signup, all calculations run in the browser.

BanglaTools provides online Bengali Unicode and Bijoy text conversion tools for students, educators, and content creators. The tools can be used without creating an account.

A free, no-signup tool that drafts a clear, professional message for telling your manager you need to leave work early. Pick a reason, tone, and one of 12 languages (RTL for Arabic and Hebrew) and get a ready-to-send message plus alternatives for text, email, or chat. Rules-based, not AI. Everything runs in your browser.

Textunnel is a lightweight cross-device sharing tool that lets you transfer text, links, code, and files between devices without creating an account or logging in. It provides a simple way to share information across computers and mobile devices directly from your browser.

A free web tool for clubs and schools that need volunteers to cover duty shifts. The organiser posts the shifts, shares one link, and everyone else taps it to claim a slot. Nobody signs up, nobody installs anything, no email addresses are collected, and there are no ads, trackers or cookies. It ships with ten real Australian club duty rosters built in — junior and senior cricket, Little Athletics, nippers, swimming club night, netball, junior AFL and junior league — each with the actual duties,

Pic Collage Maker is a free, privacy-focused browser tool for creating photo collages, grid layouts, long images, stitched compositions, and photo mosaics. Users can drag and drop photos, add text, stickers, filters, and backgrounds, then export high-resolution results. Image processing stays local in the browser, and the core tools work without signup.

Fast, private text utilities that run entirely in your browser. Alphabetize lists, remove line breaks, count sentences & syllables, generate fake words, wedding hashtags, incorrect quotes, mirror text and more. No sign-up, no login — your text never leaves your device.

Local-first browser randomness tools for dice, coin flips, random numbers, yes/no decisions and list or name picking. No account is required and active results, history and picker data stay in the browser.

Free online calculators and study tools for students — GPA calculator, final grade, percentage, weighted and cumulative GPA, pomodoro timer, exam countdown and more. No sign-up, no ads before the answer.

Free calculators for HSA, IRA, and 401(k) contribution limits, eligibility, and excess-contribution penalties — verified against IRS Revenue Procedures. All calculations run entirely in your browser; nothing is sent to a server, no account required, nothing stored.

Compile visual briefs locally into model-ready prompts and portable JSON for Seedream and Nano Banana, with explicit preserve/change rules, reference roles, warnings, and adapter differences. No account or image upload is required.

Free break-even ROAS calculator for ecommerce sellers. Enter revenue, product costs, shipping and fees to calculate break-even ROAS, maximum CPA and target ROAS. Compare pricing scenarios and export CSV. No account required; calculation inputs stay in your browser. Optional usage analytics requires consent.

Convert normal text into copy-and-paste Unicode superscript or subscript. Formula mode keeps ordinary text readable while shifting exponents, indices, and scientific notation; tiny-text mode converts every supported character. Includes live previews, character tables, worked examples, and one-click copying.

Free blood alcohol content (BAC) estimator using the modified Widmark formula. Enter weight, standard drinks or serving size and ABV, and time since the first drink for live estimates and approximate time to zero. Calculations run in the browser without an account. Includes BAC reference guides. Educational estimates only; not a measurement or a way to decide whether it is safe to drive.

Plate cost and menu pricing calculator for kitchens. Converts purchase units to recipe units and applies yield percentages, so a salmon side bought at $22/kg that yields 62% is costed at $35.48/kg of usable product rather than $22 - the most common error in restaurant costing. Returns cost per portion, food cost percentage and gross profit per dish. Runs entirely in the browser; nothing uploaded, stored or tracked, no account or email. Built by Kite Labs, an AI-operated project.

DataFormatKit offers free tools to convert text to CSV, XML to CSV, JSON to CSV or Excel, and CSV to Excel. Preview rows and columns, check CSV structure, and download the results. Source files are processed locally in your browser, and the core tools require no account.

A real-time tracking dashboard for Anthropic Claude Code rate limit reset intervals, historical cooldown periods, and usage reset announcements.

A client-side verification tool that validates Chinese 18-character Unified Social Credit Identifiers (GB 32100-2015) and parses authority codes, entity types, and regional division.

A real-time resale fee calculator that compares seller fees, shipping attribution, and estimated net payouts across eBay, Poshmark, Mercari, Depop, Etsy, and Vinted.

Visualize and explore Abstract Syntax Trees for many languages and parsers. Essential tool for compiler and tooling development.

Create flowcharts, sequence diagrams, Gantt charts, and more using simple text syntax. Live preview with export to SVG/PNG.

Generate unique SVG background shapes — waves, blobs, gradients, stacks, and more. Export as SVG or PNG for your designs.

Animated visualizations of data structures and algorithms. Step through sorting, graph traversal, tree operations, and more at your own pace.

Open-source data visualization framework. Paste your data, choose a chart type, and export beautiful visualizations as SVG or PNG.

Collection of ready-to-use CSS animations. Preview, customize timing and easing, then copy the generated CSS code.

Open-source API development ecosystem. Test REST, GraphQL, WebSocket, and more — a lightweight Postman alternative.

Full-featured in-browser Markdown editor. Sync with Google Drive and GitHub, live preview, scroll sync, and offline support.

Apply glitch effects to images and videos. 27 mosh effects including pixel sort, RGB shift, jitter, and VHS — all in the browser.

Offline-first personal budget manager inspired by YNAB. Envelope budgeting with automatic sync — all data stays on your device.

Free browser-based science and math simulations from the University of Colorado Boulder. Over 150 interactive HTML5 simulations covering physics, chemistry, biology, earth science, and math — all usable directly in the browser with no account required.

Learn CSS Flexbox through a fun frog-themed game. Complete 24 levels to master flexbox properties like justify-content and align-items.

Check HTML and CSS support across email clients. Like Can I Use, but for email — know what works in Gmail, Outlook, Apple Mail, and more.

Visual CSS gradient generator with a beautiful UI. Create linear, radial, and conic gradients with instant code output.

Generate beautiful SVG wave shapes for section dividers. Customize layers, colors, and complexity with a simple UI.

Preview color palettes on a real page layout in real time. See exactly how your colors look on text, buttons, and backgrounds.

Visual neumorphism CSS generator. Adjust size, radius, distance, intensity, and color to create soft UI shadow effects.

Generate Tailwind CSS color scales from any color. Get a complete 50–950 shade palette with one click, ready for your config.

Color palette inspiration with real-world context. See how color schemes look applied to an actual website layout, not just swatches.

Visual CSS cubic-bezier timing function editor. Drag control points to create custom easing curves and compare with presets.

Minimal distraction-free writing environment. Just open and start writing — no toolbar clutter, no distractions.

Learn CSS selectors by playing a dinner-themed game. Complete 32 levels from basic selectors to advanced pseudo-classes.

Learn SQL by solving a murder mystery. Use SELECT, JOIN, WHERE, and more to query the database and catch the killer.

Watch sorting algorithms in action with animated bar charts. Compare bubble sort, quicksort, merge sort, and more side by side.

Multi-format code and data transformer. Convert between JSON, YAML, CSV, TypeScript, GraphQL, and many more formats instantly.

Create, edit, and visualize GeoJSON data on an interactive map. Draw points, lines, and polygons with instant code output.

Convert Markdown to interactive mind maps. Write structured Markdown and see it transform into a zoomable, navigable tree visualization.

One-click copy for special characters, symbols, and emoji. Browse categories or search — click any character to copy it instantly.

Google's no-code tool for training machine learning models in the browser. Train image, sound, or pose recognition models with your own data, all processed client-side.

Interactive neural network visualization in the browser. Experiment with layers, neurons, activation functions, and learning rates to understand how neural networks learn.

This is a tool website forked from it-tools, containing 100+ tools.

A free online collage and image editing tool. No login required, completely free to use. Built entirely on the front end, ensuring absolute privacy and security for your images. Download high-resolution results with no watermarks. A clean and professional tool for creating beautiful visual works.

Open-source FIRE retirement portfolio simulator that runs your plan against 150+ years of historical US market data. Configure portfolio size, annual spending, asset allocation, withdrawal strategies, Social Security income, and more to see what percentage of historical scenarios your retirement survives.

A collection of 40+ free, browser-based color tools and SVG generators for creating backgrounds, patterns, textures, gradients, and shapes. Each tool works directly in the browser with zero signup required. Perfect for web designers and developers who need custom visuals without opening heavy design software.

A browser-based debugger for JSON Web Tokens. Paste any JWT to instantly decode its header, payload, and signature. Verify token signatures with your secret or public key. Supports HS256, RS256, ES256, and other common algorithms — all processing happens in your browser with no account required.

Learn CSS Grid layout by tending a virtual garden. Water your carrots through 28 progressively challenging levels.

Beautiful personal finance calculators for retirement, investment, mortgage, and budgeting. Interactive visualizations with no data collection.

Preview Prettier code formatting results online. Experiment with options and see formatted output for JavaScript, TypeScript, CSS, and more.

Preview and generate social media meta tags. See how your page looks on Google, Facebook, Twitter, LinkedIn, and more.

Visual type scale calculator for building harmonious typography. Choose a base size, scale ratio, and preview your type hierarchy.

Interactive regex tutorial with step-by-step lessons. Learn regular expressions from basic patterns to advanced lookaheads.

Curated ambient and electronic music mixes designed to aid concentration while programming. 60+ episodes of focus music.

End-to-end encrypted file transfer up to 10 GB. Files are encrypted in the browser before upload — no one else can read them.

Financial independence retirement calculator. Simulate withdrawal strategies with historical market data and Monte Carlo analysis.

A simple yet powerful Chrome extension that helps you extract and export cookies from any website with just one click.

Kuakua.app is your AI-powered hub for mental health resources, mindfulness meditation, and positive psychology games. Take science-backed quizzes, play brain-boosting tasks, and unlock daily affirmations to feel happier, calmer, and more resilient—anytime, on any device.

Cut and trim audio files online. Support for MP3, WAV, OGG, and 300+ formats — process files directly in the browser.