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Developer tools & everyday calculators, built to run in your browser.
83+ free utilities and 29+ browser games. No uploads, no tracking, no accounts needed.
Privacy First
All tools run entirely in your browser. No data is uploaded to our servers, ensuring your privacy and security.
Lightning Fast
Client-side processing means instant results. No waiting for server responses or dealing with upload limits.
Works Everywhere
Fully responsive design works on desktop, tablet, and mobile. Use our tools anywhere, anytime.
Popular Tools
View all 83+ →Base64 Encoder/Decoder
Convert text or files to and from Base64 encoding format.
JSON Formatter
Beautify, validate, sort keys, or minify JSON data instantly.
JSON Tree Viewer
Visualize JSON structure with expandable tree and search functionality.
YAML ⇄ JSON Converter
Convert between YAML and JSON formats with formatting options.
Image Editor
Edit images with color adjustments, creative presets, and special effects.
Image Compressor
Compress images with quality control and batch processing up to 10 files.
Image Resizer & Cropper
Resize and crop images to rectangle or circle with manual controls.
YouTube Thumbnail Fetcher
Download YouTube video thumbnails in multiple resolutions instantly.
Text & File Diff Checker
Compare two texts or files with line-by-line highlighted differences.
Cron Schedule Generator
Create and understand cron expressions with next execution preview.
URL Encoder / Decoder
Encode or decode URL components with automatic real-time transformation.
PDF Annotator
Annotate PDFs with text, images, drawings, and signatures online.
Play Free Browser Games
View all 29+ →Sudoku
Play Sudoku with live validation, timer, and difficulty levels. Super easy to hard. New puzzle every game.
Chess
Player vs Computer. Choose difficulty (easy to expert). No login, no persistence.
2048
Combine tiles to reach 2048. Arrow keys, WASD, or swipe. Best score saved locally.
Wordle
Guess the five-letter word in six tries. Green, yellow, gray clues. Random and Daily modes.
Minesweeper
Clear the grid without hitting a mine. Easy, medium, and hard. Timer, flags, and first-click safe.
Checkers
American Checkers vs computer. Easy, medium, hard AI. Mandatory captures, kings.
Othello
Reversi vs computer. 8×8 board, flip pieces to win. Easy to Expert minimax AI with alpha-beta pruning.
Tetris
Classic block puzzle. Rotate and drop tetrominoes to clear lines. Speed increases with level. High score tracking.
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Start using our free tools and games today. No sign-up, no credit card, no hassle.