Original preview
The original preview appears after you upload a file.
Glitch GIF Generator
Upload a GIF, choose the effect or layout you want, and create a new animation locally in your browser with Glitch GIF Generator.
File and settings
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Processed result
Waiting for a fileOutput preview
The output 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 to check the result
Compare the source and output previews, then check dimensions, frame count, duration, and file size to confirm that the chosen settings took effect.
The preview is a quick check. Treat the downloaded file, re-parsed for structure and timing, as the final result.
Learn more
Method and calculation
The tool reads each frame in this browser, applies the selected Glitch GIF Generator settings, and encodes the result as a GIF.
Boundaries and limitations
Large files or animations with many frames need more memory and may take longer. Check the downloaded GIF in a second player before sharing it.
Privacy and local processing
The GIF is read, decoded, processed, previewed, and encoded in this browser. Nothing is uploaded, no third-party runtime API is called, and the input is not saved.
Format and standards
GIF parsing and output follow the GIF89a format description. Very short delays, loops, and color quantization can look different across browsers and players.
Frequently asked questions
What does the glitch effect change?
It applies channel shifts, scanline dimming, and seeded block offsets to each frame. The source GIF is left unchanged and a new GIF is encoded.
Can the random seed reproduce the same effect?
Yes. With the same source, settings, and seed, the seeded glitch transformation is repeatable. Changing the seed or another setting changes the result.
Does the uploaded GIF leave the browser?
No. The GIF is decoded, processed, and encoded in this browser; it is not uploaded or stored by the tool.