GIF Editor

An animated GIF is a sequence of images, each with its own display time, called the delay, stored in hundredths of a second. Many GIFs also save space by storing only the changed part of each frame and relying on disposal rules to build the full picture. When you open a file, the editor decodes it with those rules applied, so every frame in the strip looks exactly like it does in a browser, and edits can't produce glitches from missing partial frames.

Timing is where GIFs are most often wrong. You can select frames (click, Shift+click for a range, Ctrl or Cmd+click to add) and give them a fixed delay in milliseconds, or speed them up or slow them down by 0.5×, 0.75×, 1.5× or 2×. With nothing selected, the change applies to the whole GIF. Delays are kept between 20 ms and 10 seconds in 10 ms steps, because GIF can't store finer timing and browsers play delays under 20 ms at a sluggish 100 ms. Delete and Reverse work on frames too, and Undo steps back through your edits.

Crop works on the full frame with a draggable box, aspect presets (free, 1:1, 4:3, 16:9 and 9:16) and exact pixel fields. Resize scales the cropped result from 10% to 200%. A caption can be added to every frame at the top or bottom, in bold text with an adjustable size, any color and an optional black outline, wrapped automatically to fit. The preview animates with the real delays, so you see the result before exporting.

Export re-encodes the GIF in the browser with its own color palette for each frame (256, 128, 64 or 32 colors), keeping transparency where the source had it. You can choose to loop forever, play once or play a set number of times. No video engine is involved, so the editor starts instantly; large GIFs with hundreds of frames simply take longer to encode, and fewer colors or a smaller size produce smaller files.