PNG to WebP Converter

Convert your PNG images to WebP format instantly. Adjust compression quality to optimize file size.

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WebP supports the same full alpha transparency as PNG, but compresses considerably better — Google's benchmarks show lossless WebP averaging ~26% smaller than PNG, with lossy WebP going much further when the content allows it. For a website, converting PNG graphics to WebP is usually a straightforward file-size win with no visible quality trade-off.

PNG vs WebP: what actually changes

  • Transparency: Fully preserved. WebP's alpha channel works the same way PNG's does, in both lossy and lossless mode.
  • File size: Lossless WebP averages ~26% smaller than PNG. Lossy WebP (fine for photos with transparency) can cut 60-80% off the original.
  • When to use lossless: Sharp-edged graphics, logos, and UI icons where any softening is noticeable — lossless or 90%+ quality keeps edges crisp.
  • When to use lossy: Photographic content with transparency, where 80-90% quality is visually indistinguishable from the PNG at a fraction of the size.

How to convert PNG to WebP

  1. Upload: Drag and drop your PNG files.
  2. Set quality: 90%+ for graphics/logos, 80-90% for photos with transparency.
  3. Convert: Runs locally via WebAssembly.
  4. Download: Individually or as a ZIP.

Frequently Asked Questions

Does PNG to WebP conversion keep transparency?

Yes. WebP supports a full alpha channel in both its lossy and lossless modes, so transparent areas in the PNG are preserved after conversion — unlike converting to JPG, which cannot keep transparency at all.

How much smaller is WebP than PNG?

Google's benchmarks show lossless WebP averaging about 26% smaller than PNG, and lossy WebP (when transparency allows it) can be considerably smaller still — often 60-80% smaller for photographic PNGs.

Should I use lossy or lossless WebP for a PNG with transparency?

For graphics, logos, and UI elements where edges must stay crisp, use higher quality settings (90%+) or lossless. For photos with a transparent background, lossy WebP at 80-90% usually looks identical while cutting file size significantly.

Is it safe to use this browser-based tool?

Yes. All processing happens locally via WebAssembly — files are never uploaded to a server.