Animated GIF cropper
Crop every frame of an animated GIF to the same rectangle. Watch the rectangle over the playing animation before exporting. Nothing is uploaded.
Chrome and Edge first. GIF and animated WebP decoding need ImageDecoder; MP4 export also needs WebCodecs H.264 support. Unsupported browsers show a clear message.
Input: up to 100 MB and 150 frames, 4096 pixels per side, and 128 MB of decoded frame pixels. Output: up to 960 pixels per side and 50 MB. Larger animations are rejected, never shortened silently.
GIF output has up to 256 colours per frame and binary transparency. WebP frame delays are rounded to GIF’s 10 ms steps. Very short source delays follow browser decoding behaviour. The chosen loop setting replaces the original repeat count.
GIF output uses gifenc by Matt DesLauriers, MIT. License text. Animation decoding uses your browser.
How to use this tool
Choose a GIF. Drag across its animated preview to choose a rectangle, or enter left, top, width and height in pixels. Select Crop GIF and save the result.
Frequently asked questions
Is it free, and are my files uploaded?
It is free with no account. Your file is decoded and processed on your device. Nothing is uploaded.
Which browsers can use this tool?
Use current Chrome or Edge first. This tool needs the browser ImageDecoder API for GIF or WebP animation. MP4 export also needs a working WebCodecs H.264 encoder. If support is missing, the page explains it and does not export only the first frame.
What are the size limits?
Input: up to 100 MB and 150 frames, 4096 pixels per side, and 128 MB of decoded frame pixels. Output: up to 960 pixels per side and 50 MB. Larger animations are rejected, never shortened silently.
Will it keep animation timing and transparency?
All decoded frames are exported. GIF stores delays in steps of 10 milliseconds, with a 10-millisecond output minimum; WebP delays are rounded with cumulative timing to limit drift. A zero or missing delay uses the browser display delay, or 100 milliseconds if unavailable. GIF frame delays longer than 655.35 seconds cannot be exported. GIF has at most 256 colours per frame and only fully transparent or opaque pixels, so colours and soft transparent edges can change.
Can I choose how the GIF loops?
Yes. Choose loop forever or play once. The output uses your chosen setting rather than copying the source repeat count.
How do I crop a GIF without dragging?
Enter left and top offsets from the upper-left corner, followed by the crop width and height in whole pixels. The rectangle must fit inside the source image, and its size must be no more than 960 pixels per side.