PNG masters your transparent assets but bloats your bundle. AVIF keeps every alpha pixel and cuts the weight by up to 70% on photographic PNGs, 30–40% on flat graphics.
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Alpha preserved, bytes cut dramatically
Upload single or multiple PNGs — opaque or transparent, 8-bit or 16-bit. Indexed-color PNGs expand to truecolor during processing.
Photographic PNGs encode as lossy AVIF at quality 50 (typically 60–80% smaller). Flat graphics and UI content encode as lossless AVIF (30–45% smaller). Alpha preserves either way.
AVIF output carries transparency, dimensions, and color profile. Filenames preserved with .avif extension. Works with picturefor progressive enhancement.
Convert images between these related converters
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AVIF encoding is 10–100× slower than PNG saving. The payoff is per-request bandwidth every time the image loads. Heavy-traffic assets benefit most.
your PNGs never touch a server
process entire PNG asset folders without round-trips
Alpha handling, compression ratios, encoding time, and browser support.
Yes — identically. AVIF's alpha channel is encoded separately using AV1's monochrome mode, then combined at decode. Every transparent, semi-transparent, and opaque pixel in your PNG preserves its exact alpha value in the AVIF output.
Lossless for icons, logos, UI graphics, screenshots with text — anywhere JPG-style artifacts would offend. Lossy for photographic PNGs (where PNG was never the ideal format). Our tool auto-selects based on content analysis, with manual override available.
For photographic PNGs converted to lossy AVIF: 60–80% reduction. For UI and icon PNGs using lossless AVIF: 25–40% reduction. For very small images (10 KB), overhead can shrink or even reverse the gain — measure before converting tiny assets.
Yes. AVIF supports 10-bit and 12-bit color. 16-bit PNGs currently down-sample to 10-bit for AVIF output (AV1 doesn't support 16-bit). For most content the visual impact is zero, but color-critical workflows should verify.
PNG compression uses generic DEFLATE (fast). AVIF uses AV1 with block prediction, variable-block-size transforms, and rate-distortion optimization (slow). Expect 1–5 seconds per image in-browser. Server-side tooling with multi-threaded encoders is faster if you need production-scale conversion.
ICC color profiles preserve in AVIF's color_profile box. PNG text chunks (description, author) don't have a direct AVIF equivalent. EXIF — rare in PNG but possible — transfers when present using AVIF's EXIF box.
On the same content, AVIF typically runs 15–25% smaller than WebP. Whether the extra encoding time and marginally lower browser support are worth it depends on your traffic. For high-volume image endpoints, yes; for low-volume, the WebP status quo is fine.
AVIF has 92% browser coverage as of 2025 — not quite universal. For production, use picturewith AVIF first, WebP or PNG fallback for older browsers. Content management systems and image CDNs automate this negotiation via Accept headers.