How to Optimize an Animated GIF for Size and Quality
GIF optimisation works best when you simplify the animation before reducing colours or accepting visible artefacts.
Read guide →GIF Optimizer
Re-encode an animated GIF with fewer colours, smaller dimensions, fewer frames, or optional dithering.
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Reviewed 2026-07-10
About GIF Optimizer
Animated GIF size is influenced by dimensions, frame count, colour complexity, and frame content. This optimizer can cap the palette between 2 and 256 colours, scale dimensions from 20% to 100%, and keep every frame, every second frame, or every third frame.
GIF decoding and encoding are local to the browser. The decoder holds full composited RGBA frames, so memory use grows with width × height × frame count and can greatly exceed the compressed GIF size.
Supported formats
- Animated or single-frame GIF input
- Animated GIF output
How to use it
- Add an animated GIF. Choose the source and review the decoded frame strip and timing before changing settings.
- Reduce carefully. Lower the colour cap or scale first. Use frame reduction only when the animation still looks acceptable, and enable dithering if gradients band badly.
- Optimize and replay. Create the new GIF, compare motion, transparency, colour, dimensions, and file size, then download the result.
Useful for
- Reduce the dimensions of a reaction GIF for a chat or forum limit.
- Lower palette complexity in a simple screen recording or pixel-art animation.
- Reduce frame density while preserving the overall animation duration.
Limitations
- Optimization is not guaranteed to reduce every GIF. A source that is already well optimized can become larger after re-encoding.
- Dropping frames preserves total timing by folding skipped delays into retained frames, but motion becomes less smooth.
- Large dimensions or many frames can exhaust browser memory, especially on mobile devices; process a smaller or shorter source when that happens.
Questions and answers
Does frame reduction make the GIF play faster?
The implementation carries skipped-frame delays into retained frames, preserving the overall duration. The motion can still look more abrupt because fewer visual states remain.
What does dithering do?
Dithering uses pixel patterns to approximate colours outside the reduced palette. It can soften banding but may add visible grain and can affect file size.
Is the loop setting preserved?
Yes. The optimizer reads the GIF loop count and passes it to the new animated GIF encoder.
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