APNG — Animated Spinner
A 12-frame animated PNG (APNG) of a rotating arc — a lossless, alpha-capable alternative to animated GIF. Useful for testing APNG support, frame extraction, and GIF↔APNG conversion.
Specifications
- Format
- APNG
- Width
- 128
- Height
- 128
- Frames
- 12
- Frame Duration Ms
- 90
- Loop
- infinite
What is a .apng file?
APNG (Animated PNG) extends the PNG format with animation by adding frame-control chunks while remaining backward compatible with static PNG decoders. It supports full 24-bit color and 8-bit alpha per frame, unlike GIF's 256-color limit. It is used for high-quality short animations.
How to use this file
Use an example APNG to test animated-PNG decoding, backward-compatible fallback to the first frame in older decoders, and conversion to and from GIF or WebP.
Related files
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- pgmPGM — Netpbm Test Image (P5)A 256×256 fruit still-life image as binary Netpbm P5 (8-bit greyscale) — the minimal, header-plus-raw-pixels family used across Unix imaging tools. For testing Netpbm parsers and conversion.
- ppmPPM — Netpbm Test Image (P6)A 256×256 fruit still-life image as binary Netpbm P6 (24-bit colour) — the minimal, header-plus-raw-pixels family used across Unix imaging tools. For testing Netpbm parsers and conversion.
- tgaTGA — Truevision Test ImageA 256×256 fruit still-life image saved as uncompressed Truevision TGA — a format common in games and 3D texturing. For testing TGA decoders and conversion to modern formats.
- png16-bit Grayscale PNG (deep colour)A 16-bit (deep-colour) grayscale PNG holding a smooth 0–65535 gradient — for testing high-bit-depth support and spotting banding when a tool truncates to 8-bit.
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