Compress GIF Online — Reduce File Weight Fast
Uncompressed animated GIFs can easily swell beyond 15 megabytes, crashing chat applications and wrecking mobile page speed scores. Our browser-based GIF compression engine shrinks file weight through lossy LZW codebook optimization, color table palette clamping (from 256 colors down to 64 or 32), and intelligent frame deduplication. Because all color mapping algorithms execute inside local Web Workers, your media remains private while yielding up to 70% reduction in byte size.
Drag & drop MP4, WebM, MOV, or photos here. 100% processed in your browser.
Platform Attachment Ceilings & Lossy LZW Compression
GIF file size is predominantly governed by two factors: the bit depth of the color table and the repetition frequency in the LZW compression codebook. By clustering similar color vectors via NeuQuant neural network quantization, our optimizer dramatically increases consecutive byte patterns, enabling the LZW compressor to pack frames into a fraction of original file weight without perceptible blur.
| Platform Target | Hard Limit | Optimal Resolution | Target Palette | Typical Byte Savings |
|---|---|---|---|---|
| Discord Standard Upload | 8 MB | 320 × 240 px | 128 colors | 40% – 55% reduction |
| Discord Emoji / Sticker | 256 KB | 128 × 128 px | 64 colors | 60% – 75% reduction |
| Slack Custom Emoji | 128 KB | 64 × 64 px | 32 colors | 70% – 85% reduction |
| Email Marketing Newsletter | 1 MB | 480 × 320 px | 128 colors | 45% – 60% reduction |
Adaptive Palette Clamping
Clamping color depth from 256 colors down to 64 or 32 yields immediate byte savings by reducing local color table entries, while preserving dominant foreground contrast and character silhouettes.
Lossy LZW Codebook Compaction
By allowing slight variance between near-identical neighboring pixels, the LZW dictionary finds significantly longer repeating byte runs, packing complex animations into fractions of their original weight.