Turn a sprite sheet into an animated GIF

Set a grid, inspect the motion, choose timing and export a loop from an existing image.

To convert a sprite sheet to GIF, divide it into frames, put them in playback order, choose frame timing and encode the sequence. FrameMint performs these steps locally in your browser. Start with a PNG that has real transparency when possible; JPG and WebP also work as single-sheet inputs.

Define the grid before editing

Suppose your sheet is 1024 × 1024 pixels, arranged as four columns and four rows without gaps. Each frame is 256 × 256 pixels. Open the image, enter 4 columns and 4 rows, and choose “Fit row / column grid”. The tool reads left to right, then top to bottom. It does not infer which poses belong to an action.

For a border or space between cells, enter Offset X/Y for the top and left border and Gap X/Y for the space between cells. The width calculation is floor((image width − offset − (columns − 1) × gap) / columns). A warning reports unused right or bottom pixels. Check the grid before going further; applying it again resets frame edits.

Watch a complete cycle

Press Play. Try 8 or 12 FPS for an initial look, then change it to suit the artwork. At 8 FPS, eight frames last one second. Select a frame and set Duration to 250 ms to hold it for a quarter second; a duration of 0 follows the global FPS setting. A longer hold changes rhythm but does not add new motion.

Choose the loop behavior

Loop repeats the frame order. Play once stops on the last frame. Ping-pong plays forward and then backward without repeating either endpoint: four frames become 1, 2, 3, 4, 3, 2. For a walk cycle, ordinary Loop often makes more sense than reversing footsteps.

Export and check the downloaded file

Choose Animated GIF. The export uses the edited order and timing, with timing rounded to 10 ms and a minimum of 20 ms. GIF supports at most 256 palette colors per frame and a single transparent index; partly transparent edges become opaque or transparent at an alpha threshold of 128. Open the downloaded GIF to check its final appearance. The working canvas preview retains PNG colors and alpha, so it is not a GIF color-proof.

For semitransparent effects or precise pixel colors, also export the PNG sequence or atlas. FrameMint does not upload images or call a generation API. Use only artwork you have permission to use.

By Draconova · Updated 14 September 2026. This guide describes the current tool; use the preview and check your downloaded output.