About Framimo

Framimo is a free, local-first converter for GIF, animated WebP, AVIF and MP4. The idea is simple: the file you drop in should stay on your device unless you explicitly choose otherwise.

How the conversion works

• GIF is encoded in your browser with a JavaScript encoder; animated WebP with a WebAssembly build of libwebp.
• MP4 and AVIF use the browser's own WebCodecs video encoders (H.264 for MP4, AV1 for AVIF). Still-image AVIF is a single AV1 frame wrapped in an AVIF container by our own writer.
• Animated AVIF is encoded on your device in browsers with an AV1 encoder, such as Chrome and Edge. Other browsers can opt in to server encoding, only after you confirm it. Still-image AVIF conversion has no server fallback.

Supported browsers

GIF and WebP conversion work in current versions of the major browsers. AVIF and MP4 encoding need WebCodecs encoders, which are available in current Chrome and Edge. Firefox and Safari can display AVIF files but may not be able to create them here. Support changes over time; see Can I use for display support.

How we write and check our pages

Every converter page states what the tool really does, including its limits, such as transparency being flattened in GIF, MP4 and AVIF output. Factual claims about formats cite primary sources, and each page shows when it was last reviewed. Read the full methodology.

Contact

Questions, bug reports or corrections: support@framimo.com or the support page. See also our privacy policy.