GIF to AVIF Converter

Graphics Interchange Format (GIF) is a mixed image format used for short silent loops, simple animations and legacy compatibility. Files saved as GIF usually come from CompuServe. Before converting, check that the source is the highest-quality copy you have, because every later step can only preserve what is already there.

The target is AV1 Image File Format (AVIF), a lossy image format chosen for highly compressed modern images and complex photos. Both stages are lossy, so re-encoding adds one more generation of compression artifacts; start from the best source and avoid repeating the step. The output keeps the original dimensions or sample rate unless you change them, so this step changes the encoding rather than the content.

AVIF uses AV1 intra-frame coding, the smallest option for photographic detail, but encoding is slower and older viewers cannot open it. Animated frames are not preserved by {toExt}: only the first frame is written, and the motion sequence is lost. GIF’s 256-colour palette is expanded to full RGB, so gradients stop banding but the file may grow before the new encoder compresses it again. File size stays close to the source because both sides use comparable encoding efficiency.

This conversion runs locally in your browser tab through Canvas or FFmpeg.wasm. The file is read from your device, decoded, re-encoded and handed back as a download; it is not uploaded to a conversion server. That keeps private recordings, client material and unreleased artwork off shared infrastructure.

After the download, play or open the result before deleting the original. Check the first and last seconds, confirm that transparency, rotation metadata or sample rate survived, and compare file sizes. If something looks wrong, retry with a higher quality setting rather than converting the output again.