About 123 Toolbox
123 Toolbox is a free collection of hundreds of browser-based tools for PDFs, images, developers, designers, and the Khmer language. Everything runs in your browser — files and text are processed locally on your device and are not uploaded to a server.
The project was started in Cambodia to give Khmer-speaking users practical, offline-friendly utilities — PDF editing, QR codes, Khmer digit conversion, address formatting, government reference data, and much more — without signing up, installing software, or paying.
The interface supports English, Khmer, and a bilingual mode. Much of the code was written with AI assistance, so tools are verified against their documented formulas and sources before they are trusted for important work.
Principles
- Private by design — your files never leave your browser.
- Free — no accounts, no paywalls, no hidden costs.
- Honest — estimates, fallback data, and AI-assisted work are clearly labeled.
- Open source — the full code is public on GitHub.