GIF Maker

GIF Maker writes the images you add out as the frames of a single animated GIF. The first image sets the canvas — its own dimensions, scaled down if they exceed the maximum width you choose — and every other image is painted onto that canvas in turn. The finished sequence goes to gif.js, which reduces each frame to a palette of at most 256 colours inside Web Workers. All of that happens in this browser tab, so the images are not transmitted and no copy of them reaches a server.

The controls are the ones the format actually has. Frame delay applies to every frame alike — 200 ms is five frames a second — and is rounded to the nearest 10 ms, because GIF records timing in hundredths of a second. Colour quality is the sampling factor the quantiser uses when choosing those 256 colours: 1 inspects nearly every pixel and is slow, 20 samples sparsely and gives coarser bands. Dither, off by default, spreads the quantisation error with Floyd–Steinberg so gradients band less, at the cost of noise that compresses badly. Looping is either forever or once.

Images of different shapes are reconciled in one of two ways. Fit inside and pad centres each frame within the canvas and fills what is left with the background colour; Fill the frame and crop scales the image until both sides of the canvas are covered and discards what hangs over the edge. The background is painted before every frame either way, and that is also what becomes of transparency: a PNG with an alpha channel is flattened onto that colour, and the GIF that comes out has no transparent pixels at all. Set the background to match whatever the animation will sit on, because a white halo cannot be removed afterwards.

There are firm edges worth knowing first. Two images is the minimum and 300 the ceiling; go past the ceiling and the refusal names how many files it counted. Maximum width only ever shrinks the first image, so asking for 640 px from a 400 px photo returns 400 px. Every frame carries the same delay, so no single frame can be held longer than the rest. Anything this browser cannot decode — HEIC from a phone, a camera RAW file, a truncated download — is skipped and counted in the summary, and the job fails only if fewer than two images survive. Whichever file ends up first in the running order is the exception, since it fixes the canvas: if that one will not open, the run stops with a decoding error rather than carrying on without it. And the tool exists to animate images that already stand as separate stills: a video file is not accepted, and an animated GIF dropped in contributes only its first frame.

Runs on your device. Your file is processed directly in this browser.