Turn still images into an animated GIF

Files become frames in the order shown in the file list. The default duration applies to every frame unless you enter a frame-specific duration. At 200 milliseconds per frame, five frames make a one-second animation before repetition. GIF stores time in hundredths of a second, so durations round to the nearest 10 milliseconds. The minimum offered here is 20 milliseconds; some viewers slow very short durations.

Fit whole image keeps every part of the image and leaves space around it when proportions differ. Fill and crop covers the canvas and cuts off edges as needed. White or black backgrounds flatten transparency. Transparent mode uses GIF's on-or-off transparency: partially transparent edges become opaque or transparent. Each frame clears before the next, so a transparent background does not deliberately retain earlier artwork.

GIF supports at most 256 palette colours per frame. This encoder has no dithering, so gradients, photographs and subtle shadows may show banding or colour changes. Simple drawings, logos and step-by-step diagrams often work better. This is a still-image animation maker, not a video converter, and it does not edit an existing animated GIF.

Output dimensions and combined frame pixels are bounded before encoding. Phones and low-memory devices allow one million pixels per canvas; larger devices allow two or four million. Input file size, aggregate input bytes and retained output also have device-specific limits. Reduce image dimensions, output size or frame count if the browser rejects the workload. Encoding runs in a worker and stops when you cancel.