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PNG vs AVIF – Which Format Is Better?

AVIF delivers dramatically smaller files with modern compression. PNG offers universal compatibility and guaranteed lossless quality.

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Quick Answer

Use AVIF for web images when the smallest possible file size matters most and browser support covers your audience. Use PNG for images you need to edit repeatedly, for print work, or when the image must stay exactly lossless.

PNG vs AVIF Comparison

FeaturePNGAVIF
CompressionLossless onlyLossy and lossless
TransparencyYes (alpha channel)Yes (alpha channel)
Typical file sizeLarge40-60% smaller than PNG
Encoding speedFastSlow (10-50x longer than PNG)
Browser supportUniversalChrome, Firefox, Edge, Safari 16.4+
Best forEditing, print, legacy compatWeb pages, performance-critical apps
Color depthUp to 48-bit RGB + 16-bit alphaUp to 12-bit with HDR support
AnimationAPNG (limited)Yes (native, excellent quality)

When to Use PNG

  • Image editing pipelines, since lossless saves keep the exact pixel data
  • Print and prepress, where professional software supports it everywhere
  • Archival storage, because PNG is a predictable, proven format with long-term support
  • Maximum compatibility, as it works everywhere without fallbacks
  • Simple graphics such as icons and logos, where PNG's compression is efficient enough

When to Use AVIF

  • Websites tuned for performance, where the smallest files mean the fastest page loads
  • HDR images, since AVIF supports high dynamic range content
  • Animated content, with better animation quality at small file sizes
  • Users with limited bandwidth, such as mobile users and emerging markets
  • Progressive web apps that need strong compression

Key Differences Explained

Compression is where AVIF stands out. Built on the AV1 video codec, it produces files 40-60% smaller than PNG at comparable visual quality. The cost is much slower encoding: what takes PNG milliseconds can take AVIF seconds. For web images that are encoded once and served millions of times, the trade-off is worth it.

AVIF also supports HDR. It can store high dynamic range images with wide color gamuts (BT.2020), which PNG cannot, so photographers who want to show HDR work on the web choose AVIF.

Browser support is the main thing to check. PNG works everywhere. AVIF is supported in Chrome 85+, Firefox 93+, Edge 85+, and Safari 16.4+, so if some of your visitors use older browsers, serve a fallback format alongside AVIF.

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Frequently Asked Questions

Is AVIF better quality than PNG?

AVIF achieves better visual quality than PNG at much smaller file sizes, thanks to its advanced compression based on the AV1 video codec. However, AVIF uses lossy compression by default, while PNG is always lossless. If you need pixel-perfect accuracy, PNG is the safer choice. If you want the smallest files with excellent visual quality, AVIF wins.

Can AVIF replace PNG for web use?

For most web use cases, AVIF can replace PNG. It supports transparency, produces much smaller files, and is supported by all major modern browsers. The main reason to keep using PNG is for older browsers that don't support AVIF or for workflows requiring guaranteed lossless quality with zero data loss.

Why are AVIF files so slow to create?

AVIF uses the AV1 video codec for compression, which requires much more computation than PNG's deflate algorithm. Encoding can take 10-50x longer than PNG depending on the quality settings. This is a trade-off for the much smaller file sizes. For static websites, this is usually acceptable since encoding happens once at build time.

Does AVIF support transparency?

Yes. AVIF supports alpha channels for transparency, including partial transparency, just like PNG. You can convert transparent PNGs to AVIF while preserving the transparency effect, often with dramatic file size savings.