About Multiconversor
Last updated: 2026-09-12
Why this site exists
Converting an image is a two-second job, and yet the usual route is to hand your photos to a stranger's server, wait in a queue, dodge a download button that turns out to be an ad, and take it on faith that the file is deleted afterwards. For a holiday snapshot that is merely irritating. For a scan of your passport, a medical report or a signed contract, it is a bad idea.
Browsers have been able to decode and encode images on their own for years. Multiconversor just uses that: the conversion runs in the same tab you are reading this in, your file stays on your device, and there is no server-side pipeline to trust in the first place.
How it works
For JPG, PNG, WebP and AVIF the browser's own image decoder reads the file and the Canvas API writes the new one. HEIC is the exception: no browser ships a HEIC decoder, because the codec is covered by patents, so a WebAssembly build of libheif is fetched the first time you convert a HEIC file and does the decoding locally.
There is a deliberate limitation worth naming: HEIC is available as an input only, never an output. No browser can encode HEIC, and a converter that claimed otherwise would be lying to you.
How it is paid for
The site is free and always will be. It carries advertising, which covers the domain and hosting. We have kept ads out of the tool itself — nothing sits between you and the convert button, and no download link is ever an ad in disguise.
Contact
Found a file that will not convert, or a format you would like added? Write tohola@multiconversor.com — a sample file that reproduces the problem is always the fastest way to get it fixed.