PNG to WebP Converter

Convert PNG images to WebP online for free. Batch conversion in your browser, no upload limits and no credits used.

WebP does everything PNG does โ€” lossless encoding and a full alpha channel โ€” in a substantially smaller file. For web assets that need transparency, it is close to a straight upgrade, which is not something you can usually say about a format change.

Lossless and transparent, but smaller

WebP has a lossless mode as well as a lossy one, and both support partial transparency. Converting a PNG to lossless WebP gives you a pixel-identical image, alpha intact, commonly 20โ€“30% smaller. Choosing lossy WebP instead saves far more and is usually still indistinguishable on screen.

  • Logos, icons, and UI assets with transparency convert cleanly and get noticeably lighter.
  • Screenshots and flat graphics โ€” PNG's traditional home ground โ€” are exactly where lossless WebP wins.
  • Soft shadows and anti-aliased edges survive, so cut-out product shots still sit on any background.

The photograph case

If your PNG is actually a photograph, the saving is dramatic rather than incremental: lossy WebP will typically be a small fraction of the PNG at no visible cost, because a photograph never needed a lossless format in the first place. This is the most wasteful case PNG is commonly used for, and the easiest to fix.

When to keep the PNG around

Keep a PNG copy for anything that has to leave the browser โ€” design handoffs, print, upload forms, older desktop software. Serve WebP on the site, archive the PNG. That way the compatibility gap costs you nothing and the page still loads at the smaller size.

Frequently asked questions

Does WebP support transparency like PNG?
Yes, including partial transparency such as soft shadows and anti-aliased edges. This is what makes it a viable replacement for PNG rather than only for JPEG.
Is converting PNG to WebP lossless?
It can be โ€” WebP has a lossless mode that reproduces the PNG pixel for pixel while still being smaller. Lossy WebP saves considerably more and is usually indistinguishable on screen.
How much smaller is WebP than PNG?
Around 20โ€“30% for lossless conversion of flat graphics. For a photograph mistakenly saved as PNG, lossy WebP can be a small fraction of the original.
Should I delete the PNG after converting?
Keep it. Serve WebP on the web and archive the PNG for print, design handoffs, and any tool or form that will not accept a .webp file.

What to do next

This tool is free. When you need more than file housekeeping, these pick up where it stops.

Background Removal Converting to PNG for transparency only helps if something is actually transparent โ€” this cuts the background out.Bulk Image Upscale Converting will not recover a low-resolution source. Upscaling raises the resolution before you export.AI Image Editor Change what is in the image, not just the container it ships in.