About YuliusBox

YuliusBox is a collection of free online tools that run entirely in your browser: compress images, merge and compress PDFs, convert video to GIF, generate Excel formulas with AI, beautify screenshots, and transcribe audio with on-device AI. There are no accounts to create, no software to install, and no files to upload.

The project started from a simple frustration: every “free online tool” seemed to require uploading your files to a stranger's server, waiting in a queue, and hitting a monthly quota. For sensitive material — contracts, ID documents, unreleased work, personal recordings — that trade-off is unacceptable. Modern browsers are powerful enough to do the work locally with WebAssembly, the Canvas API, and on-device machine learning, so YuliusBox simply does it there.

Why you can trust it

• Verifiable privacy. You don't have to take our word for it — open your browser's network inspector while using any tool and watch: your files never leave your device.
• Open source. The full source code is public on GitHub, so anyone can audit exactly what the tools do.
• No dark patterns. No fake download buttons, no countdown timers, no “premium unlocks” gating basic features. Free means free.

How it stays free

YuliusBox is built and maintained by Yulius as an independent project. Running costs are kept near zero because there is almost no server infrastructure — your browser does the heavy lifting. In the future, the site may show a small number of clearly-labeled display ads to cover domain and maintenance costs. It will never sell data, because it doesn't collect any.

Get in touch

Feedback, bug reports, and tool requests are welcome at [email protected].