A curated list of free, browser-based tools for developers, writers, students, and everyday tasks, no installs, no signups.
Every tool listed here runs entirely in the browser and is free to use. Contributions are welcome, see Contributing.
- Anagram Solver - Find every valid word from a set of letters, grouped by length, for Scrabble, Words with Friends, and word puzzles. No signup.
- Character Counter - Count characters with and without spaces in real time.
- Convert Case - Bulk-convert text between upper, lower, title, sentence and more cases.
- Diff Checker - Compare two blocks of text side by side and highlight added, removed and changed lines instantly, free with no signup.
- Diffchecker - Compare two texts and highlight the differences.
- Diffhero - Free, browser-based diff checker for text and code with syntax highlighting for ~17 languages, word-level diffing, and JSON-aware comparison. Nothing is uploaded.
- Find and Replace - Free find and replace text online with regex support, case sensitivity and whole word matching. No signup.
- Landing Page Clarity Checker - Check headline and CTA copy against seven transparent editorial signals.
- Letter Counter - Count letters and letter frequency in any text.
- Remove Duplicate Lines - Remove duplicate or blank lines from a block of text.
- Text Case Converter - Switch text between upper, lower, title, sentence and toggle case instantly.
- Text Repeater - Repeat any text or phrase a set number of times.
- Textbench - 64 free text tools in one page (case conversion, cleanup, encoding, hashing, generators) that run entirely in your browser. Nothing uploaded.
- Word Cloud Generator - Create word clouds from any text with custom colors and max word count, download as PNG, runs entirely in your browser.
- Word Counter - Analyze text with word, character, sentence, paragraph, and reading-time counts.
- API Status Badges - Copy a live SVG status badge for any of 62 APIs into a README, refreshed every 5 minutes.
- Base64 Encoder / Decoder - Encode and decode text or files to and from Base64.
- Base64 Text Converter - Encode text or files to Base64 and decode Base64 strings, supports Unicode, no signup.
- crontab.guru - Understand and build cron schedule expressions.
- Developer Tools - 20+ browser-based dev tools: JSON/XML/YAML formatters, JWT decoder, diff, hash and more.
- Epoch Converter - Convert Unix timestamps to readable dates.
- File Hash Checker - Compute SHA-256, SHA-512 and SHA-1 hashes for any file to verify downloads and check integrity, entirely in the browser.
- HTML to Markdown - Convert HTML into clean Markdown.
- JSON Formatter - Format, validate, and beautify JSON with syntax highlighting.
- JSON Formatter & Minifier - Format, validate and minify JSON in the browser, no upload.
- JSONLint - Validate and format JSON with error reporting.
- JWT Decoder - Decode and inspect a JWT's header, payload and signature.
- JWT Generator - Generate signed JWTs for testing and development.
- jwt.io - Decode, verify and generate JSON Web Tokens.
- Markdown to HTML - Convert Markdown to clean HTML with live preview.
- Meta Tag Generator - Generate SEO and Open Graph meta tags for any page.
- Nginx Config Generator - Generate Nginx server blocks from domain, root, port and common options.
- Password Strength Checker - Check password strength with an entropy score, estimated crack time, and a 9-point security criteria breakdown, entirely client-side.
- Redirect Checker - Follow a shortened or redirecting URL through every hop, showing status codes, redirect type (301/302/307), and the final destination, server-side with no signup.
- regex101 - Build, test and debug regular expressions with explanations.
- Text Encrypt / Decrypt - Encrypt and decrypt text with AES-256-GCM entirely in the browser, password-protected, no upload, no signup.
- URL Encoder / Decoder - Encode and decode URL components and query strings.
- UUID Generator - Generate v4 UUIDs individually or in bulk.
- Calculator.net - Huge free library of calculators for almost anything.
- Concrete Estimator Hub - Free concrete estimating calculators for slab volume, bag counts, post holes, ready-mix comparisons, and material cost planning.
- Date Calculator - Calculate the difference between two dates.
- Desmos - Free advanced online graphing calculator.
- Discount Calculator - Calculate discounts, sale prices and savings.
- Omni Calculator - Thousands of calculators across many topics.
- Percentage Calculator - Calculate percentages, percentage increase/decrease, and percentage differences instantly, free and no signup required.
- Percentage Decrease Calculator - Calculate the percentage decrease between two values.
- Percentage Increase Calculator - Calculate the percentage increase between two values.
- Scientific Calculator - Full scientific calculator with trig, logs and more.
- Statistics Calculator - Calculate mean, median, mode, standard deviation and quartiles from a list of numbers, free and no signup required.
- Time Calculator - Add, subtract and convert time durations.
- Home Loan EMI Calculator - Calculate EMI and interest for a home loan.
- Invoice Generator - Create professional invoices with line items, download as PDF instantly. No signup required.
- Loan EMI Calculator - Calculate loan EMI, total interest and payment schedule.
- Loan / Mortgage Calculator - Estimate mortgage payments, interest and amortization.
- Personal Loan EMI Calculator - Calculate EMI and interest for a personal loan.
- SmartBizCalc - 300+ free business calculators covering payroll tax, break-even, self-employment tax, S-corp savings, startup costs, and contractor pricing. No signup.
- Tax Bracket Calculator - Find your federal tax bracket and effective tax rate instantly, no signup.
- BMI Calculator - Calculate body mass index instantly with metric or imperial units, no signup.
- BMR Calculator - Calculate Basal Metabolic Rate for daily energy use.
- Body Mass Index Calculator - Calculate Body Mass Index from height and weight.
- Calorie Calculator - Estimate daily calorie needs from your stats and activity.
- Noise Exposure Calculator - Calculate OSHA noise dose and 8-hour TWA for workplace hearing conservation compliance.
- Omni Calculator — Health - Free health and fitness calculators.
- Nutilz One Rep Max Calculator - Estimate your 1-rep max from any weight/rep set using the Epley, Brzycki, Lombardi and O'Connor formulas, plus a training percentage table, free and no signup required.
- Age Calculator - Calculate exact age in years, months and days.
- CGPA Calculator - Calculate cumulative GPA across multiple semesters.
- DailyToolkit GPA Calculator - Calculate semester GPA with weighted credit hours and letter or point grades.
- Nutilz Age Calculator - Find your exact age in years, months and days, plus a countdown to your next birthday, free and no signup required.
- Nutilz GPA Calculator - Enter course grades and credit hours for an instant GPA, no signup.
- RapidTables - Reference tables, converters and calculators.
- Wolfram Alpha - Computational knowledge engine for math and science.
- Color Converter - Convert colors between HEX, RGB, HSL and more.
- Color Hunt - Curated color palette inspiration.
- Color Palette Generator - Generate and export color palettes for your projects.
- Coolors - Generate, edit and explore color palettes fast.
- CSS Box Shadow Generator - Visually build CSS box-shadow values with live preview.
- CSS Filter Generator - Build CSS filter effects visually with live image preview across blur, brightness, contrast and more, copy production-ready CSS instantly, free with no signup.
- CSS Gradient - Create and customize CSS gradients visually.
- CSS Gradient Generator - Create CSS gradients and copy the code.
- CSS Gradient Text Generator - Generate CSS for gradient-filled text.
- Haikei - Generate SVG backgrounds, blobs and waves.
- Nutilz Signature Maker - Draw or type a digital signature and download it as a PNG. No sign-up, no watermark, nothing stored.
- Realtime Colors - Preview color palettes on a live UI mockup.
- Blur Background - Automatically blur image backgrounds in the browser.
- Image Compressor - Compress JPG, PNG and WebP images in the browser.
- Image Cropper - Crop images to custom sizes and aspect ratios.
- Image Resizer - Resize images to exact dimensions without uploads.
- JPG to PNG Converter - Convert JPG images to PNG in the browser.
- Metadata Remover - Inspect and remove file metadata locally in the browser without signup.
- Photopea - Free browser-based photo editor.
- PNG to JPG Converter - Convert PNG images to JPG in the browser.
- Quick Image Kit - Compress and resize images in the browser without signup.
- remove.bg - Remove image backgrounds automatically.
- SnapOG - Generate and download 1200x630 Open Graph images in the browser without signup.
- Squoosh - Compress and compare images in the browser.
- TinyPNG - Smart lossy compression for PNG and JPEG.
- WebP Converter - Convert images to and from WebP.
- Barcode Generator - Create CODE128, EAN-13, EAN-8, UPC and CODE39 barcodes with auto check digits, free and no signup.
- Bitwarden Password Generator - Generate strong passwords and passphrases.
- Favicon.io - Generate favicons from text, images or emoji.
- Hashtag Generator - Generate relevant hashtags for social posts.
- Lorem Ipsum Generator - Generate placeholder lorem ipsum text.
- Password Generator - Generate strong, customizable random passwords.
- QR Code Generator - Create QR codes for URLs, text and more.
- QR Code Monkey - Create custom QR codes with logos and colors.
- README Generator - Build a project README from a guided form.
- readme.so - Build a project README with a visual editor.
- RealFaviconGenerator - Generate favicons for all platforms and devices.
- WizGenerator Story Generator - Create customizable stories from genre, tone, characters and plot details.
- Vedic Astrology Chart - Generate a Vedic birth chart from date, time and place.
Contributions are welcome. Please read CONTRIBUTING.md before submitting a pull request.
This list is released under CC0 1.0 Universal (Public Domain).
To the extent possible under law, all copyright and related rights to this work have been waived. You may copy, modify, distribute, and use this list — even commercially — without asking permission.