About Convertmaxxing

Convertmaxxing is a media converter that works the way file tools should: you open the page, drop in your files, and get results — no account, no upload progress bar, no “free tier” with a paywall behind it.

No uploads, by design

The trick is that there is no server doing the conversion. When you convert a photo or a video, the bytes never leave your device. There is nothing to upload, which also means there is nothing for us to store, scan, or lose. That architecture is the whole privacy story, and it's verifiable: open your browser's network tab while converting and you'll see no file uploads.

How it works

Images convert through ImageMagick — the same battle-tested engine used on servers for decades — compiled to WebAssembly and running inside your browser. The engine downloads once (about 5 MB), gets cached by your browser, and converts everything from everyday JPEG and PNG to HEIC iPhone photos, camera RAW files, AVIF, and JPEG XL.

Video converts through Mediabunny on WebCodecs, your browser's own hardware-accelerated video pipeline. MOV, MP4, WebM, and MKV files convert to MP4 or WebM — and when the source video already fits the target format, Convertmaxxing repackages it without re-encoding: lossless, and nearly instant. Because encoding support varies by browser, the converter checks yours up front and tells you honestly when something won't work rather than producing a broken file.

Free, and staying that way

The site is free to use and will eventually be supported by unobtrusive display ads — never ads that gate your downloads or interrupt a conversion. Read the privacy policy for the full picture, the terms of service for the ground rules, and the licenses page for the open-source software this site is built on.

Who makes this

Convertmaxxing is an independent project by HYPEWORKS. Questions, bug reports, or a format you wish we supported? Email hello@convertmaxxing.com — we read everything.