Convert PNG to APNG Online

Turn PNG Images Into an Animated APNG

This tool stitches a set of PNG images into a single animated PNG (APNG) — each file you upload becomes one frame, played in the order you add them. Because APNG is a backward-compatible extension of PNG, your full 24-bit color and 8-bit alpha transparency carry over to every frame, so soft edges, glows, and drop-shadows stay clean instead of getting the jagged 1-bit cutout that GIF forces on you. Drop in a single PNG and you get a valid one-frame APNG; drop in a sequence and you get a smooth animation.

How to Convert PNG to APNG

1. Upload Your PNG Files: Drag and drop your PNG images or click "Upload." Add them in the order you want them to play — that order is the frame order.
2. Set the Framerate: Open the framerate dropdown and pick a speed. 10 FPS (Recommended) is the default and reads well for most loops; 1 FPS (Slideshow) holds each frame for a full second, while 30–50 FPS gives near-video smoothness.
3. Adjust Image Quality, Resolution, or Colors: Use Image Quality (%) to trade size for fidelity, set a Preset Resolution or Width/Height to scale frames, or apply Colors (By Color Reduction + Dither) to shrink the palette. Leave these at default to keep every frame lossless.
4. Convert and Download: Click "Convert" and download your APNG. No sign-up, no watermark.

APNG vs GIF for Animation

Frequently Asked Questions

Does APNG keep the transparency from my PNG files?

Yes. APNG inherits PNG's full 8-bit alpha channel, so every pixel keeps its exact opacity across all frames. This is the main reason to choose APNG over GIF: a GIF can only mark a pixel as fully transparent or fully opaque, which leaves a hard fringe around soft edges, glows, and drop-shadows. APNG preserves those gradients with no halo.

What framerate should I pick for a smooth animation?

It depends on the look you want. 10 FPS (the default) is a good general loop speed and keeps file size modest. For fluid, video-like motion choose 25–30 FPS; for a stepped, deliberate sequence use 2–5 FPS; and 1 FPS turns your images into a one-second-per-slide slideshow. In our testing, a 12-frame sticker sequence at 10 FPS produced a smooth ~1.2-second loop, while the same frames at 30 FPS ran in under half a second.

Will APNG play in every browser?

In about 94.7% of them, per current caniuse data — Chrome 59+, Firefox 3+, Safari 8+, Edge 79+, and Opera 46+ all play APNG natively. For the small share of clients that don't (mainly Internet Explorer and the old non-Chromium Edge), the file degrades gracefully: APNG stores its first frame as a standard PNG stream, so those viewers show a static image instead of breaking.

Do the PNG files need to be the same size?

For a clean result, yes — give every frame the same width and height so they line up. If your sources differ, use the Preset Resolution or Width/Height controls to normalize them to a common size before converting. Mismatched dimensions can leave frames offset or padded against the canvas.

How many images can I combine, and is there a size limit?

You can combine a full sequence of PNGs into one APNG. The practical limit is upload size and time rather than a fixed frame count — large, high-resolution batches take longer to transfer over the network. If your APNG comes out larger than you'd like, lower the Image Quality (%), scale down with a Preset Resolution, or reduce the palette with Colors (By Color Reduction + Dither). For the reverse direction, see APNG to GIF or APNG to PNG.

What happens to my files after converting?

Your PNGs are uploaded over an encrypted (TLS) connection and processed on our servers, then deleted automatically after a few hours. There's no sign-up, no watermark, and files are never shared or made public.