Zero File Uploads
Tools run in your browser with JavaScript and WebAssembly. PDFs use PDF.js, images use Canvas, crypto uses Web Crypto—your files never reach our servers.
Most used tools
J
JSON Formatter
Free JSON formatter — paste minified or messy JSON and instantly get beautified, indented output with syntax highlighting and error detection. Browser-based, no server upload. Runs locally in your browser when supported—no upload required for normal use.
I
Image Compressor — Compress JPG, PNG & WebP Online
Compress JPG, PNG & WebP in your browser—up to 80% smaller, batch 25 files, 50/100/200 KB presets. Files stay on your device. No signup.
M
Merge PDF
Free PDF merger — combine multiple PDF files into one document. Drag to reorder files, preview pages, and download the merged PDF instantly. No signup, fully browser-based. Runs locally in your browser when supported—no upload required for normal use.
W
Word Counter
Instantly count words, characters, sentences, paragraphs, and reading time. Great for essays, articles, and SEO writing. No signup — works as you type. Runs locally in your browser when supported—no upload required for normal use.
B
BMI Calculator
Calculate BMI from height and weight using metric or imperial units. See BMI category ranges and use it as a quick screening estimate. Runs locally in your browser when supported—no upload required for normal use.
R
Regex Tester
Free regex tester — highlight matches, capture groups, flags, and replace preview. JavaScript RegExp in your browser; patterns and text stay on your device, nothing uploaded.
P
Password Generator
Free password generator — create strong random passwords with custom length and character sets: uppercase, lowercase, numbers, and symbols. Copy instantly. Fully browser-based. Runs locally in your browser when supported—no upload required for normal use.
L
Length Converter
Convert meters, feet, inches, miles, kilometers, yards, and more with fast live calculations across all major units. Runs locally in your browser when supported—no upload required for normal use.
Browse by Category
10 categories — everything runs locally in your browser
PDF Tools
Merge, compress, split & convert
15 tools
Image Tools
Compress, resize & convert images
22 tools
Calculators
Health, finance & math
58 tools
Developer Tools
JSON, regex, JWT & UUID
58 tools
Text Tools
Word count, case & diff tools
13 tools
Unit Converters
Length, weight & temperature
10 tools
Date & Time
Age, hours & timezone tools
23 tools
Design & UI
CSS generators & color tools
21 tools
File Converters
CSV, JSON, XML & PDF formats
9 tools
3D Tools
GLTF, STL & 360° viewers
6 tools