Extend GIF animation duration

Extend animation duration online — Loop GIF, WebP, APNG, AVIF, JXL

Some websites and platforms require animated images to have a minimum duration before they can be uploaded. For example, a platform might require GIFs to be at least 2 seconds long. If your animation is too short, this tool will duplicate its frames to extend the total duration until it meets the required length.

Choose "Extend to target duration" and enter the minimum length in seconds. The tool will loop the animation's frames as many times as needed to reach that duration, preserving the original frame timing. Alternatively, use "Repeat animation N times" to simply multiply the animation by a specific number of repetitions.

Works with animated GIF, WebP, APNG (animated PNG), AVIF, MNG, and JPEG XL (JXL) files. The output format matches the input — a GIF input produces a GIF output.

Extend duration vs. loop count — what's the difference?

This tool is different from the GIF loop count changer. The loop count controls how many times the existing animation replays in the viewer — it's a metadata flag that tells browsers to repeat the same frames, but does not change the file's actual content or duration. Some platforms ignore the loop count entirely and only look at the real duration of the file.

Extend duration, on the other hand, physically duplicates the frames inside the file, making the animation genuinely longer. The resulting file contains more frames and has a longer total runtime, which satisfies minimum duration requirements that a simple loop count change cannot.

If you need to change the playback speed instead, use the animation speed changer. To trim an animation that's too long, use the GIF cutter.