GIF & Video · Browser-first processing

Optimize an Animated GIF

Reduce GIF file size with palette and frame optimizations on this device when supported, with an optional secure worker fallback. The default path runs in this browser. If this browser cannot decode the media or the file exceeds the local limit, you can explicitly choose the secure worker fallback.

Processed on this deviceFREE tier1 credit / runNever leaves this device

Decode input framesthis device
Transform or encode the resultthis device

GIF Optimizer Online processing workspace

GIF Optimizer OnlineProcessed on this device

or drop files here Selected files stay in this browser tab.

Preview and result

Local browser processing

Select a supported file or enter the requested values, then run the tool.

This browser path does not upload the selected source to ImgNimble. Closing or refreshing clears the selected files and generated result from the page.

Use secure worker fallback instead

Use this only when the browser cannot decode/encode the file or the local operation is too large. Choosing this fallback uploads the selected file to the configured secure worker and consumes 1 anonymous/member credit(s).

Common questions

How this tool behaves

Where does GIF Optimizer Online process the file?

With GIF Optimizer Online, the default path reads the selected file in this browser. It is uploaded only if you explicitly choose the secure worker fallback.

How long does GIF Optimizer Online retain its worker result?

The GIF Optimizer Online worker result is temporary and is deleted by the retention cleanup schedule, normally within 24 hours.

Why does GIF Optimizer Online enforce input limits?

For GIF Optimizer Online, animation and video processing is CPU intensive. Local caps protect mobile stability; larger or unsupported files can use the consent-based worker fallback.

What inputs work best with GIF Optimizer?

GIF Optimizer validates the selected file before processing. Use GIF within the 35 MB per-file limit. Keep an untouched original for comparison.

How is a GIF Optimizer worker result protected?

For GIF Optimizer Online, the local path creates the output in browser memory. If you choose worker fallback, the upload uses HTTPS and the result is returned through an expiring signed download.

Practical checks

Before you use the output

Verify the result

Keep the original, inspect the generated output and confirm the current destination requirements before replacing or submitting a file.