Welcome to UseConverter
UseConverter is a free, privacy-first collection of simple online tools
No uploads. All tools work right in your browser—your data never leaves your device.
UseConverter is built with vanilla JavaScript and styled with Tailwind CSS and DaisyUI no frameworks, no nonsense.
"People will never stop reinventing the wheel"
— My Wife
A tiny demo of the site's philosophy
This game is written in pure JS/HTML - just like the tools on UseConverter. No deps, runs entirely on your device, and it's oddly hypnotic. For now it's CPU vs CPU
Human mode might come later.
Pong Wars
day vs night — runs entirely in your browser
day 0 | night 0
Based on Pong Wars by Koen van Gilst — source:
github.com/vnglst/pong-wars. No external libraries.
UUID Generator
Generate unique random IDs (UUID v4) instantly in your browser.
Image Converter
Convert and resize images (PNG, JPG, WebP) with full privacy.
Password Generator
Create secure passwords with custom options, instantly and privately.
Epoch Converter
Convert between Unix timestamps and human-readable dates, with time zone support.
JSON Diff
Compare two JSON objects to find differences with color-coded highlighting.
ULID Generator
Generate ULIDs (Universally Unique Lexicographically Sortable Identifiers) instantly.
HackerNews Browser
Browse Hacker News top, new, and best stories with filtering by minimum score.
Test Image Generator
Generate blank or noisy test images with specific dimensions and file sizes.
Word & Character Counter
Count words, characters, and estimate reading time with advanced text analysis.