Converting PPM to GIF reduces the image to a 256-color palette. For scientific visualizations with limited color schemes this can work; for photographic or full-color PPM content it causes visible banding.
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Drop your PPM files here
Palette quantization introduces banding on gradients. No alpha to worry about (PPM has none). GIF's LZW compression is effective on flat-color content.
GIF plays everywhere.
PPM is a trivially simple uncompressed RGB format from the Netpbm suite. Each pixel is three bytes, prefixed by a tiny text header. Used in academic image processing, scientific computing pipelines, Linux kernel boot splashes, and as a debug format because anyone can write a parser in 20 lines.
GIF is a 1987 format limited to a 256-color palette. Its lasting relevance is support for simple animation, which kept it in the meme ecosystem after PNG replaced it for static images. GIF compression is lossless within its palette constraints but usually worse than PNG for the same image.
When the PPM has limited colors (visualizations with heatmaps or categorical coloring) and the target platform requires GIF. For photos or full-color content, PNG is better.
Yes, if the PPM has more than 256 colors. The encoder picks which colors to keep and optionally dithers the rest.
PPM is a trivially simple uncompressed RGB format from the Netpbm suite. Each pixel is three bytes, prefixed by a tiny text header. Used in academic image processing, scientific computing pipelines, Linux kernel boot splashes, and as a debug format because anyone can write a parser in 20 lines.
GIF is a 1987 format limited to a 256-color palette. Its lasting relevance is support for simple animation, which kept it in the meme ecosystem after PNG replaced it for static images. GIF compression is lossless within its palette constraints but usually worse than PNG for the same image.
Yes. The converter runs entirely in your browser using WebAssembly. Your images are never uploaded, never sent to a server, and never leave your device.
There's no hard limit, but because everything runs in your browser you're bounded by available memory. Very large images (over a few hundred megapixels) can hit browser memory limits. Process in smaller batches if you run into issues.