Original preview
The original preview appears after you upload a file.
GIF Speed Adjuster
Upload a GIF and speed it up or slow it down with a multiplier, a uniform delay, or a half-speed preset.
File and speed settings
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Speed mode
Speed-adjusted result
Waiting for a fileAdjusted preview
The adjusted preview appears after processing finishes.
- Original size
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- Output size
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- Output dimensions
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- Output frames
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- Output duration
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- Processing details
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Choose a file to begin.
How playback speed is changed
Multiplier mode scales each frame delay; uniform mode applies the same delay to every frame. The minimum delay prevents impractically fast playback.
The output keeps frame order. Players may still clamp very short delays differently.
Learn more
Method and calculation
For multiplier mode, each delay is divided by the speed multiplier and clamped to the minimum. Uniform mode assigns the same delay to every frame.
Boundaries and limitations
Very short delays are clamped to the selected minimum, so extreme speed settings may not be exact in every player.
Privacy and local processing
Reading, decoding, delay editing, and result generation happen in this browser. Files are not uploaded or saved.
Format and standards
The output follows GIF89a timing fields. Browsers and players can differ in how they display very short delays and finite loops.
GIF speed questions
How is GIF playback speed changed?
Multiplier mode scales each frame delay, uniform mode gives every frame the same delay, and the half-speed preset uses a 0.5× multiplier.
Why can playback differ slightly between players?
Very short delays are clamped to the selected minimum, and browsers or players can handle timing with different precision. Extreme settings may therefore not look identical everywhere.