Free Online Tools for Developers and Creators

Free browser-based utilities for JSON, Base64, Regex, PDFs, images, SEO previews, text editing, colors, calculators, and technical references. No sign-up required.

Visual Tools

Free online image tools: compress, convert, extract colors, and download YouTube thumbnails with browser-friendly workflows.

Image Compressor - Compress images without losing quality – browser-based, unlimited & free. Better than TinyPNG for privacy: no files leave your device. Compress now!
Format Converter - Convert images between PNG, JPG, WebP instantly in browser. Batch support, no quality loss, privacy first – no server needed. Convert now!
Color Extractor - Extract dominant colors from any image and copy HEX, RGB, and HSL codes instantly. 100% in-browser, no upload. Free palette generator for designers.
YouTube Thumbnail - Download YouTube video thumbnails in HD and 4K resolution. Paste a link, grab the image – no ads, no signup, completely free. Try it now!
Image Resizer KB - Resize images to an exact KB target for upload limits & email. Browser-based, no upload to servers – 100% free & private. Resize now!
PNG to ICO - Convert PNG to multi-size ICO for favicons (16x16 to 256x256). One-click download – browser only, no upload. Best free favicon tool!
Image Cropper - Crop images with preset aspect ratios or freeform selection. Visual editor, instant download – browser-based, no upload, free. Crop now!
HEIC Converter - Convert Apple HEIC/HEIF photos to JPG or PNG in your browser. No upload, no software install – fast, free & private. Convert now!
OCR Text - Extract text from photos & screenshots using Tesseract.js. Multi-language, browser-based, no upload – 100% free & private. Extract now!
TeamSpeak Avatar Resizer - Resize any image to 320x320 for TeamSpeak avatars instantly. JPG, PNG, GIF supported – browser-based, no upload, free. Resize now!

Dev Tools

Free developer tools: JSON formatter, Base64 encoder, regex tester, QR code generator, and password generator. All browser-based.

JSON Formatter - Format, validate and beautify JSON instantly in your browser. Free, fast, no sign-up required, and useful for API responses, configs, logs and debugging.
Base64 - Encode/decode Base64 strings & files in browser. Fast, unlimited, no server upload – great for devs. Alternative to base64encode.org. Try now!
Regex Tester - Test & debug regular expressions live. Real-time matches, explanations – better than regex101 alternative. Browser-based, no signup!
QR Code - Create QR codes for URLs, text, WiFi, vCard instantly. Fully customizable, high-quality download – no upload, privacy focused. Make QR now!
Password Generator - Generate strong random passwords (8-128 chars) with crypto-grade security. Customize length, symbols, numbers. 100% offline, never stored. Free.
URL Encoder - Encode & decode URLs with encodeURIComponent. Debug API queries & URL issues – browser-based, instant, 100% free. Encode now!
HTML Entity - Convert special characters to HTML entities & decode back. Essential for web devs – browser-based, instant, 100% free. Convert now!
Hash Generator - Generate MD5, SHA-1, SHA-256 & SHA-512 hashes instantly. All computed in your browser – no upload, no server, free. Hash now!
JWT Decoder - Paste a JWT to decode header, payload, and signature as JSON. Check expiry status instantly. 100% in-browser, no data sent to servers. Free.
Code Minifier - Minify HTML, CSS & JavaScript by removing whitespace & comments. Smaller files, faster sites – browser-based, free. Minify now!
cURL Builder - Build cURL commands without memorizing syntax. Set method, headers, body, auth visually and copy the ready-to-use command. No signup, free.
SQL Formatter - Format and beautify SQL queries instantly. Uppercase keywords, custom indentation, syntax highlighting. Free online SQL formatter.
CSV to JSON Converter - Convert CSV to JSON or JSON to CSV instantly. Auto-detect delimiters, download results. Free online converter tool.
Cron Expression Parser - Parse and explain cron expressions in plain language. See next execution times. Preset examples included. Free online cron tool.
Color Code Converter - Convert multiple color codes between HEX, RGB, HSL formats at once. Bulk conversion for developers. Free online color converter.

Text & PDF

Free text and PDF tools: merge, split, compress PDFs; text case converter, markdown editor, diff checker, and lorem ipsum generator.

PDF Tools - Merge, split & compress PDFs in your browser – no upload to servers, no watermarks, unlimited use. Better than Smallpdf for privacy. Try now!
Text Tools - Count words, change text case, remove duplicates & more – all in one browser tool. No upload, no signup. Perfect for writers & editors. Try now!
Markdown Editor - Write Markdown with instant side-by-side preview. GFM support, HTML export – browser-based, no account needed. Free StackEdit alternative. Try now!
Text Diff - Compare two texts side by side with highlighted differences. Line-by-line diff, no upload, 100% private – better than Diffchecker. Try now!
Lorem Ipsum - Generate custom Lorem Ipsum text – words, sentences, paragraphs. Copy instantly for designs & mockups. Fast & free browser tool!
Bold Text Generator - Convert text to bold, italic, script & monospace Unicode styles. Copy-paste anywhere – social media ready, 100% free. Generate now!
Small Caps Generator - Transform text into small caps, superscript, circled & fullwidth Unicode styles. Copy-paste ready – no download, free. Convert now!
Upside Down Text - Flip text upside down, mirror it, add strikethrough or zalgo effects. Fun Unicode tricks – browser-based, free. Flip now!
Morse Code - Convert text to Morse code and back – even listen to the beeps. Encode & decode instantly, browser-based, 100% free. Translate now!
Online Notepad - A simple, distraction-free notepad that auto-saves in your browser. No account, no cloud – just open and type. Start writing now!
Writing Analyzer - Analyze readability, word count & Flesch score of your writing. Improve clarity instantly – browser-based, free, no signup. Analyze now!

Design Tools

Free design tools: color palette generator, color converter, CSS gradient builder, and box shadow generator. No installation needed.

Color Palette - Generate beautiful color palettes randomly or from image. HEX, RGB copy in one click – browser tool, no signup. Ideal for designers & devs. Create palette!
Color Converter - Convert colors between HEX, RGB, HSL, HSV & CMYK instantly. Live preview, one-click copy – browser-based, no download needed. Convert now!
CSS Gradient - Build stunning CSS gradients visually with drag-and-drop. Linear, radial, conic – copy production-ready code instantly. No signup. Create now!
Box Shadow - Design perfect CSS box-shadow effects visually. Adjust blur, spread, offset & color – copy clean code instantly. No download needed. Try now!
Font Pairer - Discover beautiful font pairings for your website. Preview Google Font combinations live, get CSS code instantly. Free online font pairing tool.
Contrast Checker - Check color contrast ratios for WCAG AA and AAA compliance. Ensure your website text is readable and accessible. Free online tool.
SVG Editor - Edit SVG files online with live preview. Change colors, dimensions, viewBox. Download or copy modified SVG instantly. Free browser-based tool.
Border Radius Generator - Create CSS border-radius values visually with individual corner control. Copy ready-to-use CSS code. Free online border radius generator.
Glassmorphism Generator - Generate glassmorphism CSS with visual controls. Adjust blur, opacity, saturation for frosted glass UI effects. Free online tool.
Text Shadow Generator - Create CSS text-shadow effects with multiple layers. Adjust offset, blur, color visually. Copy CSS code instantly. Free online tool.

Finance Tools

Free finance calculators: severance pay, fuel cost, VAT, meeting cost, car rental, and more. Quick, accurate, browser-based.

Severance Pay - Calculate severance pay & net salary with current Turkish legal limits. Accurate, private, browser-based – no signup needed. Calculate now!
Fuel Cost - Estimate fuel cost for any trip distance. Enter consumption & price per liter – instant results, no download, 100% free. Plan your trip now!
Percent & VAT - Calculate percentages, discounts & VAT (KDV) instantly. Quick math for shopping, invoices & accounting – browser-based, no signup. Try now!
VP / Robux - Convert Valorant Points & Robux to real money (TRY/USD). Compare bundle values, find best deals – free, no download needed. Calculate now!
Meeting Cost - See the live dollar cost of your meetings in real time. Add attendees & salaries, watch the counter tick – eye-opening & free. Try now!
Car Rental Glossary - Understand CDW, insurance & hidden rental fees before you sign. 50+ terms decoded in plain language – free, no download. Read now!
Farm Chemical Calc - Calculate exact pesticide & fertilizer amounts per tank or decare. Field-ready interface, no app download – 100% free. Calculate now!
Tile & Floor Calc - Calculate tiles, grout & adhesive for your project. Adjustable waste %, budget estimator – no signup, browser-based. Plan your renovation now!

Health Tools

Free health tools: macro calculator, BMI calculator, unit converter, and eye break timer (20-20-20 rule). Privacy-first.

Macro & Calorie - Calculate your daily macros, BMR & TDEE with the Mifflin-St Jeor formula. Metric & imperial – free, private, no account. Start now!
BMI Calculator - Calculate your BMI and ideal weight range instantly. Metric & imperial supported – browser-based, private, no signup needed. Check now!
Unit Converter - Convert length, weight, temperature, data & more instantly. Dozens of units covered – browser-based, no download, 100% free. Convert now!
Eye Break 20-20-20 - Protect your eyes with the 20-20-20 rule. Get gentle reminders during long screen sessions – browser-based, no install needed. Start now!
Calorie Calculator - Calculate daily calorie needs with the Mifflin-St Jeor equation. Get BMR, maintenance, deficit and surplus calories. Free online tool.
Water Intake Calculator - Calculate your daily water intake based on weight, activity, and climate. Get recommendations in liters and glasses. Free online tool.
Sleep Calculator - Calculate the best bedtime or wake-up time based on sleep cycles. Wake up refreshed with 90-minute cycle planning. Free tool.
Heart Rate Zone Calculator - Calculate target heart rate zones for exercise. Get personalized training zones with the Karvonen formula. Free online calculator.
Body Fat Calculator - Calculate body fat percentage with the US Navy method. Get fat mass, lean mass, and fitness category. Free online calculator.
Pregnancy Calculator - Calculate your due date and track pregnancy milestones. See current week, trimester, and key dates. Free online pregnancy calculator.

Fun Tools

Free fun tools: AI prompt builder, decision wheel, CPS test, keyboard tester, nickname generator, countdown timer, and more.

AI Prompt Architect - Build structured prompts for ChatGPT, Claude & Gemini. Set role, context & instructions – free, no signup, browser-based. Craft prompts now!
Decision Wheel - Add your options, spin the wheel and let fate decide. Fair, fun & customizable – no download, no ads, completely free. Spin now!
CPS Test - Measure your clicks per second with a precise CPS test. Perfect for gamers – browser-based, no download, instant results. Test now!
Keyboard Test - Test every key on your keyboard in real time. Find stuck or broken keys instantly – browser-based, no install required. Test now!
Nick Generator - Create unique, stylish nicknames with cool fonts & symbols. Perfect for gaming & social media – no download, 100% free. Generate now!
Countdown Timer - Track days, hours & minutes to any important date. Birthdays, launches, holidays – browser-based, no signup needed. Start counting now!
Gacha Habit Machine - Turn daily habits into a gacha game. Complete goals, earn tokens & collect rare cards – fun, free, browser-based. Start your streak now!
Tinder Task Cleaner - Swipe right to complete tasks, left to skip. The most fun to-do list ever – browser-based, no signup, 100% free. Start swiping now!

Social Tools

Free social and productivity tools: white noise generator, hashtag finder, invisible character, date calculator, and Pomodoro timer.

White Noise - Mix rain, ocean waves & ambient sounds to focus or relax. Customizable soundscapes – no download, no ads, completely free. Listen now!
Hashtag Bank - Find 300+ trending hashtags for Instagram, TikTok & X. Boost your reach with curated niche tags – free, no signup. Get hashtags now!
Invisible Character - Copy invisible & zero-width characters for usernames and bios. Blank text that works everywhere – browser-based, 100% free. Copy now!
Date Difference - Calculate exact days, months & years between two dates. Age calculator, deadline tracker – no signup, instant results. Calculate now!
Pomodoro Timer - Boost productivity with the Pomodoro Technique. 25-min focus + 5-min break – browser-based, no install, completely free. Start now!

Expert Guides

Free visual reference guides: traffic signs, dashboard warning lights, laundry symbols, AC remote symbols, and plastic recycling numbers.

Traffic Signs - Learn all traffic signs with clear explanations. Warnings, mandatory rules, info signs – free visual guide, no download needed. Study now!
Dashboard Lights - Identify every dashboard warning light in seconds. Oil, engine, ABS & more explained – free, no download, works on phone. Check now!
Laundry Symbols - Decode wash, dry & iron symbols on clothing labels. Never ruin clothes again – free visual reference, no download needed. Check now!
AC Remote Symbols - Understand every AC remote button and mode. Dry, swing, turbo & more explained – free, no download, works on any device. Learn now!
Plastic Numbers - Learn what plastic numbers 1-7 mean for recycling & health. Make sustainable choices – free visual guide, no download needed. Check now!

SEO Tools

Free SEO tools: slug generator, meta tag generator, robots.txt builder, OG tag previewer, Twitter Card generator, keyword density analyzer, and .htaccess generator.

Slug Generator - Turn any title into a clean, SEO-friendly URL slug. Handles special characters & diacritics – browser-based, instant, free. Generate now!
Meta Tag Generator - Generate title, description, Open Graph & Twitter Card meta tags instantly. Copy-ready HTML – no signup, free, browser-based. Create now!
Robots.txt Generator - Create a robots.txt file with simple toggles. Control crawler access to your site – no coding needed, free & instant. Generate now!
OG Tag Previewer - Preview how your links appear on Facebook, LinkedIn & Discord. Test OG tags before publishing – free, browser-based. Preview now!
Twitter Card Generator - Create perfect Twitter Card meta tags with live preview. Summary, large image – copy code instantly, no signup needed. Generate now!
Keyword Density - Analyze keyword frequency & density in your content. N-gram patterns, stop-word filter – browser-based, no upload. Analyze now!
.htaccess Generator - Generate .htaccess rules for redirects, GZIP, caching & security. No coding needed – free, instant, browser-based. Generate now!
Rank Tracker - Track Google rankings for target keywords. Log rank checks, monitor position changes, and export your keyword rank tracker data free.
Keyword Research - Generate long-tail keyword variations from a seed word. Proven patterns & modifiers – browser-based, free, no signup. Research now!
Site Audit - Audit your page SEO with instant scoring & actionable tips. HTML analysis, meta checks – browser-based, free, no signup. Audit now!
Backlink Monitor - Track backlinks with dofollow/nofollow stats & anchor text analysis. Local dashboard, data stays private – free. Monitor now!
Site Explorer - Parse sitemaps & visualize site architecture in a tree view. Understand site structure instantly – browser-based, free. Explore now!
Competitor Insights - Compare competitor metrics side by side with charts & SWOT analysis. Data-driven insights – browser-based, free, no signup. Analyze now!
Traffic Overview - Visualize traffic data with KPI cards, growth trends & charts. Beautiful analytics dashboard – browser-based, free. Visualize now!
AI Search Visibility - Evaluate your AI search optimization with a smart checklist & visibility score. Get ready for AI search – free, browser-based. Check now!
SEO Checker - Analyze title tags, meta descriptions & keywords with live SERP preview. Fix SEO basics instantly – free, no signup. Check now!

Jewel Crash - Swap and match 3+ jewels to score big in this addictive puzzle game. No download, play instantly in your browser – 100% free. Play now!
2048 - Slide and combine number tiles to reach 2048. Addictive puzzle game – no download, play instantly in your browser, 100% free. Play now!
Snake - Guide the growing snake to eat food and avoid walls. Classic arcade fun – no download, play instantly in your browser, free. Play now!
Minesweeper - Uncover tiles and avoid hidden mines using logic clues. Classic puzzle game – no download, play instantly in your browser, free. Play now!
Block Stacker - Stack and clear falling tetrominoes in this block puzzle. No download, play instantly in your browser, 100% free. Play now!
Sky Hopper - Tap to fly through pipe gaps in this arcade game. No download, play instantly in your browser, 100% free. Play now!
Breakout - Bounce the ball and smash all bricks in this classic arcade game. No download, play instantly in your browser – 100% free. Play now!
Memory Match - Flip cards and find matching pairs in this concentration game. No download, play instantly in your browser – 100% free. Play now!
Word Guess - Guess the 5-letter word in 6 tries with color-coded hints. No download, play instantly in your browser – 100% free. Play now!
Hangman - Guess the hidden word letter by letter before time runs out. No download, play instantly in your browser – 100% free. Play now!
Sudoku - Fill the 9x9 grid with logic in this classic number puzzle. No download, play instantly in your browser – 100% free. Play now!
Nonogram - Solve picture logic puzzles by filling cells from number clues. No download, play instantly in your browser – 100% free. Play now!
Solitaire - Sort 52 cards into foundation piles in classic Klondike solitaire. No download, play instantly in your browser – free. Play now!
Tower Defense - Build and upgrade towers to stop enemy waves in this strategy game. No download, play instantly in your browser – free. Play now!
Arena Duel - Create a gladiator, train stats & battle in the arena. Turn-based RPG, no download, play instantly in your browser, 100% free. Play now!
Maze Chase - Guide your hero through mazes, eat dots & outsmart ghosts. Arcade maze game, no download, play in your browser, free. Play now!
Alien Defense - Blast descending alien waves in this classic arcade shooter. No download, play instantly in your browser – 100% free & retro. Play now!
Paddle Ball - Two paddles, one ball in this classic arcade sports game. No download, play instantly in your browser – 100% free. Play now!
Sketch Jump - Bounce upward from platform to platform in this addictive jumper. No download, play instantly in your browser – 100% free. Play now!
Fruit Slicer - Swipe to slash flying fruits but dodge the bombs. Satisfying slicing fun – no download, play in your browser, free. Play now!
Cookie Tapper - Click cookies, buy upgrades & build a cookie empire. Addictive idle game – no download, play in your browser, free. Play now!
Piano Tiles - Tap falling black tiles to play music in this fast rhythm game. No download, play instantly in your browser – 100% free. Play now!
Four in a Row - Drop discs and line up four in a row to win. Classic strategy game – no download, play instantly in your browser, free. Play now!
Checkers - Jump and capture pieces in this classic board game. Play against AI – no download, play instantly in your browser, free. Play now!
Tic Tac Toe - Get three in a row on a 3x3 grid. Play vs AI or a friend – no download, play instantly in your browser, 100% free. Play now!
Bubble Shooter - Aim and pop matching bubble groups in this colorful puzzle. No download, play instantly in your browser – 100% free. Play now!
Cube Dash - Jump through rhythm-synced obstacles in this fast platformer. No download, play instantly in your browser – 100% free. Play now!
Color Gate - Pass through barriers matching your ball color in this arcade game. No download, play in your browser – 100% free. Play now!
Mole Smash - Smack moles as fast as they pop up in this classic reaction game. No download, play in your browser – 100% free. Play now!
Road Hopper - Hop across roads, dodge trains & cross rivers in this endless hopper. No download, play in your browser – 100% free. Play now!
Tower Bounce - Drop a ball through twisting helix tower gaps. Satisfying physics game – no download, play in your browser, 100% free. Play now!
Stack - Tap to stack blocks perfectly and build the tallest tower. Precision timing game – no download, play in browser, free. Play now!
Knife Throw - Throw knives at a spinning log without hitting others. Precision arcade game – no download, play in your browser, free. Play now!
Water Sort - Sort colored water into matching tubes in this relaxing puzzle. No download, play instantly in your browser – 100% free. Play now!
Tall Man Run - Collect items to grow taller and dodge obstacles in this fun runner. No download, play in your browser – 100% free. Play now!
Parking Jam - Slide cars to clear a path in this clever parking puzzle. No download, play instantly in your browser – 100% free. Play now!
Balloon Guard - Shield a rising balloon from obstacles in this unique arcade game. No download, play instantly in your browser – free. Play now!
City Hole - Control a black hole and swallow everything in the city. Bizarre & brilliant – no download, play in your browser, free. Play now!
Gladiator Quest RPG - Train your gladiator, explore zones & battle in turn-based combat. Browser RPG – no download, play instantly, 100% free. Play now!
Zigzag - Control a ball on a zigzag path – tap to change direction and survive. Hyper-casual, no download, free browser game. Play now!
Bouncy Ball - Bounce a cute ball upward on platforms – tap to boost and climb higher. Endless fun, no download, free browser game. Play now!
Color Match - Match colors on a spinning wheel – release the ball at the right moment. Reflex-testing, no download, free browser game. Play now!
Basket Dunk - Aim and shoot basketballs into the hoop – hold to aim, release to score. Free browser game, no download needed. Play now!
Drift Pro - Drift through sharp turns on an endless road – tap to change direction. Free browser racing game, no download. Play now!
Pizza Chef - Make perfect pizzas – read orders, add toppings, and serve before time runs out. Free browser cooking game. Play now!
Hopscotch - Hop left and right on tiles in this endless runner – classic playground game reimagined. Free browser game. Play now!
Color Road - Steer your ball to match colors on a 3-lane road. Free browser game, no download needed. Play Color Road now!
Merge Link - Link and merge numbered tiles to reach higher values. Free browser puzzle, no download. Play Merge Link now!
Neon Maze - Navigate glowing mazes before time runs out. Free browser maze game, no download needed. Play Neon Maze now!
Wall Breaker - Launch balls to smash through numbered walls. Free browser game, no download needed. Play Wall Breaker now!