About UtilStax
UtilStax is a free suite of in-browser file tools for PDFs, images, video, and audio. Unlike most online converters, UtilStax processes files entirely on your device - they are never uploaded to a server. That makes it safe for contracts, medical documents, personal photos, and anything else you would not hand to a stranger's server.
Files never leave your browser
Every tool processes files on your device using WebAssembly, the browser's built-in high-performance runtime. There is no upload step, which means no server ever sees your files.
Free and usable without an account
Every tool works without signing up: 3 tasks per day anonymously, 7 with a free account. Pro ($5/month or $36/year) removes the daily cap, raises the file limit to 2GB, and unlocks batches of 50 files.
No watermarks, no dark patterns
Output files are clean - no watermarks, no forced sign-ups at the download step, no bait-and-switch limits. What the tool shows is what you get.
Who builds it
UtilStax is built and maintained by Dami (damiadeh) under Cartolinks Solutions LLC / Cartolinks Solutions Limited. It started from a simple frustration: most "free online converters" upload your files to unknown servers, stamp watermarks on the output, or hide the download behind a paywall. Browsers are now powerful enough to do the work locally - so UtilStax does.
Contact
Questions, bug reports, or feature requests: utilstax@gmail.com - or use the feedback button on any page. See also our Privacy Policy and Terms.