Convert GIF to AVIF

No — that is the whole reason I built this. The conversion runs in your browser using WebAssembly, so your files never leave your device; there is no server in the loop at all. It also means the tool keeps working offline once the page has loaded, and there is no file size limit beyond your device’s memory.

Not here — this tool produces a still of the first frame. AVIF technically has an animated variant, but encoder support is immature enough that I don’t trust it yet. For motion, a video format (MP4/WebM) is the practical answer, and it is on my roadmap.

Many GIFs use dithering — a speckle pattern that fakes extra colors within the 256-color limit. AVIF’s encoder treats that speckle as noise and smooths some of it out. Usually that looks better, not worse; if you need the exact pixels preserved, GIF to PNG is the lossless route.

Expect 80–95% for typical GIFs: you are replacing 1987-era LZW compression and a forced 256-color palette with the strongest codec in wide deployment. The per-file readout shows your exact saving before you download.

For a still frame: an 80–95% smaller file in full 24-bit color instead of a 256-color palette. What it costs is the motion — this tool exports the first frame only. For animations you control, the honest middle path is a real video file; a poster-frame AVIF plus click-to-play video beats shipping a 4 MB GIF.

Animated ones where the motion is the message — a static first frame of a reaction GIF is just a confusing photo. Pixel art also deserves thought: AVIF’s encoder smooths deliberate dither, so when each pixel must land exactly as drawn, take the lossless route instead — it is often still 30–50% smaller than the GIF.