Compress APNG Online
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Supports: APNG, PNG
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
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Need help?Compress APNG Online
Make an animated PNG smaller without breaking the animation. APNG stores every frame as full lossless PNG data with no compression across frames, so a short loop can balloon to several megabytes — this tool shrinks it by reducing colors, scaling the canvas, thinning frames, and re-optimizing the PNG stream, all while keeping the file a playable APNG. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark.
How to Compress APNG
- Upload Your APNG File: Drag and drop your animated PNG onto the page or click "Add Files" to pick it from your device.
- Set Colors and Image Quality (%): Lower the Colors value (down to a small palette with optional dithering) and pull back Image quality (%) — fewer colors is usually the single biggest size win for flat or limited-palette animations.
- Scale or Thin Frames (Optional): Drop Image resolution with a resolution percentage to shrink every frame, or reduce the frame count to cut size on long loops where buttery-smooth playback is not essential.
- Compress and Download: Click compress and save the smaller APNG. No sign-up, no watermark.
What Each Setting Costs You
| Setting | What it does | Size impact | Tradeoff |
|---|---|---|---|
| Colors (palette) | Quantizes to a smaller palette, with optional dithering | Largest single win for flat art | Banding / dither speckle on gradients |
| Image quality (%) | Lossy color reduction strength | Moderate to large | Soft edges, color shift if pushed hard |
| Image resolution (%) | Scales every frame down | Scales roughly with area | Permanent detail loss |
| Frame reduction | Removes frames from the loop | Large on long animations | Choppier motion |
| Lossless re-optimization | Re-encodes PNG stream, strips metadata | Typically 10-40% | None (pixels unchanged) |
Frequently Asked Questions
Will compressing my APNG make it choppy or change the animation?
Not unless you ask it to. Color reduction, quality, and resolution leave the frame count and timing untouched — the loop plays exactly as before, just lighter. Choppiness only appears if you deliberately thin the frames, which is the one setting that trades smoothness for a big size cut on long loops.
Why is my APNG so much bigger than the equivalent GIF or WebP?
APNG has no inter-frame compression — each frame is stored as independent lossless PNG data, so size grows with every frame. GIF is capped at 256 colors, and animated WebP uses the VP8/VP8L codecs with cross-frame compression, so both are usually smaller. The upside is APNG keeps full 24-bit color and per-pixel (8-bit) alpha transparency, which GIF cannot.
What if I need it much smaller than APNG compression allows?
Because APNG is lossless-by-design, there is a floor to how small it can get while staying APNG. If size is critical, converting to APNG to WebP often shrinks far more thanks to lossy VP8 and cross-frame compression, and animated WebP is supported across Chrome, Firefox, Edge, and Safari 14.1+. For a low-color loop with broad compatibility, APNG to GIF is the other option.
How much smaller will my file actually get?
It depends on the source. In our testing, dropping a colorful 24-bit APNG to a 128-color palette plus a lossless re-optimization pass commonly cuts 40-70%, while a flat-color UI animation can shrink further. A photographic loop that already uses thousands of colors compresses the least without visible quality loss — that is the case where converting to WebP wins.
Is it safe to upload my APNG here?
Your file travels over an encrypted (TLS) connection, is processed on our servers, and is deleted automatically after a few hours. There is no sign-up, no watermark, and nothing is shared or made public. The only practical limit on a very large APNG is upload size and time, not anything on your device.