APNG Viewer Online — Free Animated PNG Player | Online Gallery

v1.0.0Free · APNG PlayerImage Tools

APNG Viewer Online — Free Animated PNG Player | Online Gallery

Play APNG animations frame-by-frame with full playback controls. Play and inspect Animated PNG (.apng) files frame-by-frame with play/pause, frame speed control, and loop toggle.

What is APNG Viewer and what does it do?

The APNG Animation Viewer decodes Animated PNG files frame-by-frame and plays them back using an HTML5 Canvas renderer.

It displays frame count, delay timings, and lets you step through each frame or toggle auto-play.

Play and pause APNG animations with frame-by-frame scrubbing controls.
Display total frame count, per-frame delay (ms), and loop count.
Export any individual frame as a PNG image.
Show image dimensions, bit depth, and color type from PNG headers.

How does APNG Viewer work?

Reads the APNG binary, locates fcTL and fdAT chunks to extract frames, composites each onto a canvas, and animates using requestAnimationFrame.

100% private: all processing happens locally in your browser using client-side WebAssembly, WebCrypto, WebAudio, and HTML5 Canvas. Your files are never uploaded to any server.

Who needs APNG Viewer?

Web Animators

Preview and debug APNG animations without browser dev tools.

Game Developers

Inspect sprite sheet timing and frame transitions in APNG assets.

Supported file formats

APNG Animated PNG Viewer (.apng) opens and processes the following file extensions directly in your browser:

.apng.png

How to use APNG Viewer — step by step

1
Open APNG
Drop your .apng file into the viewer.
2
Control Playback
Play, pause, or step through frames one at a time.
3
Adjust Speed
Use speed slider to inspect animation timing.

Frequently asked questions

Does it work with regular PNG too?

Yes, static PNGs are rendered as a single frame.

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