PNG to GIF Converter

GIF still works where newer formats do not: old e-mail clients, forums, chat apps and sites that accept only GIF. This converter turns PNG images into GIFs in your browser. Transparent PNGs keep their transparency, animated PNGs (APNG) become animated GIFs with the same timing and loop count, and several PNGs — frames exported from an animation program, say — can be joined into one animation. Each frame gets its own optimised 256-colour palette. Nothing is uploaded.

How to use this tool

1. Choose one or more PNG or APNG files.
2. Pick one GIF per PNG, or one animation from all of them (with a time per frame).
3. Set how transparency is handled: the cut-off and the colour soft edges are blended onto.
4. Choose colours, dithering and a maximum width, then download the GIFs.

Formula

Pixel opacity ≥ cut-off → solid (blended onto the edge colour); below → transparent

PNG allows 256 levels of transparency, GIF only on or off. Pixels at or above the cut-off are made solid, mixing their colour with the edge colour in proportion to their opacity, so an anti-aliased logo edge blends smoothly into a page of that colour. GIF stores delays in hundredths of a second, so animated PNG delays are rounded to 10 ms; browsers play delays under 20 ms as 100 ms.

Example

A logo pixel that is 50% opaque red (255, 0, 0, alpha 128) with the default cut-off 128 and a white edge colour becomes solid (255, 128, 128) — pink, which looks right on a white page. With the cut-off at 200, the same pixel becomes transparent instead, giving a sharper but more jagged edge.