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Image Compression Benchmark 2026

A practical comparison of JPG, PNG, WebP, and AVIF compression — with documented methodology and real file-size data.

Last updated: August 2026 · Methodology documented below

Key Finding

WebP lossy typically produces 25-35% smaller files than JPG at equivalent visual quality. AVIF can achieve 30-50% smaller files than JPG, but browser support is still maturing. PNG remains the standard for lossless needs. For most web use cases, WebP offers the best balance of compression, quality, and compatibility.

Benchmark Results

Photograph (4000 × 3000px, 24MP)

Format Quality File Size vs JPG
PNG (lossless)N/A~12.5 MB+525%
JPG85~2.0 MBbaseline
WebP (lossy)80~1.3 MB-35%
AVIF65~0.9 MB-55%
WebP (lossless)N/A~8.2 MB+310%

Screenshot with Flat Colors (1920 × 1080px)

Format Quality File Size vs JPG
PNG (lossless)N/A~85 KB-60%
JPG85~210 KBbaseline
WebP (lossy)80~65 KB-69%
AVIF65~45 KB-79%

Methodology note: File sizes are approximate and depend on image content, encoder implementation, and quality settings. Photographs with complex textures compress differently than screenshots with flat colors. These results represent typical ranges — your specific results may vary. All processing was done using browser-based encoders.

Practical Recommendations

For Photographs

Use WebP lossy at quality 75-85 for the best balance. JPG remains a reliable fallback. AVIF offers further savings if browser support is acceptable for your audience.

For Screenshots & Graphics

Use PNG or WebP lossless for images with flat colors, sharp edges, or text. JPG's lossy compression can introduce visible artifacts in these cases.

For Web Performance

Use modern formats with fallbacks. Serve WebP with JPG/PNG fallback using the <picture> element. This gives you better compression while maintaining compatibility.

For Maximum Compatibility

Use JPG for photographs and PNG for graphics requiring transparency. These formats are universally supported across all browsers and applications.

Frequently Asked Questions

Is WebP always smaller than JPG?

For photographs, WebP lossy typically produces 25-35% smaller files than JPG at equivalent visual quality. For images with flat colors or sharp edges, the difference can be even larger. However, JPG remains universally compatible and is still a good choice when compatibility is the top priority.

Should I use AVIF for everything?

AVIF offers excellent compression, but browser support is not yet universal. Use AVIF with a WebP or JPG fallback. Encoding speed can also be slower than WebP or JPG. Consider your audience's browser usage before adopting AVIF as the primary format.

What quality setting should I use for WebP?

Quality 75-85 is a good starting point for photographs. At these settings, most viewers cannot distinguish the compressed image from the original at normal viewing sizes. Lower quality settings (60-70) produce smaller files but may show visible artifacts on close inspection.

Can I compress images without losing quality?

Lossless compression (PNG, WebP lossless, lossless GIF) preserves all image data. Lossy compression (JPG, WebP lossy, AVIF) removes some data for smaller files. For photographs, lossy compression at moderate quality settings produces files that look identical to the original at normal viewing sizes.

Try It Yourself

Compare compression formats with your own images.

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Written by Image Tools Team

Published: 2026-08-15 · Updated: 2026-08-28