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PNG to WebP

Cut PNG file sizes by around a quarter without losing anything, transparency included.

Convert PNG to WebP

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How to convert PNG to WebP

  1. Add your PNGs. Logos, icons, screenshots, or graphics.
  2. Choose lossless or lossy. Lossless for graphics, lossy for photographic content.
  3. Download. Individually or as a zip.

About PNG to WebP

This is the single easiest performance win available to most websites. WebP in lossless mode stores exactly the same pixels as a PNG in roughly 26 percent less space, with the alpha channel intact. Nothing is discarded, nothing looks different, and the file is meaningfully smaller. For a site carrying dozens of PNG logos, icons, and UI assets, converting them is a measurable improvement to load time for no visual cost at all.

The lossless-versus-lossy choice matters more here than for any other conversion, because PNG sources split cleanly into two kinds. Logos, icons, screenshots, diagrams, and flat-colour graphics belong in lossless mode: they are what PNG is for, and lossless WebP simply does the same job more efficiently. Photographs that happen to have been saved as PNG belong in lossy mode, where the savings jump from around a quarter to well over eighty percent.

Transparency survives either way, which is the main reason people hesitate. WebP supports an alpha channel in both lossy and lossless modes, unlike JPEG, so a logo with a transparent background converts without acquiring a white box. That makes WebP a genuine drop-in replacement for PNG on the web rather than a compromise.

The caveat is where the file is going. Browser support is universal now, so for anything served on a website WebP is safe. Outside the browser it is patchier: some older desktop software, some email clients, and upload forms validating against outdated extension lists will still refuse it. Use WebP for the web and keep a PNG for anything that has to be emailed or opened in unpredictable software.

What to expect

PNG contentModeTypical saving
Logos and iconsLossless~26% smaller
Screenshots with textLossless20–30% smaller
Diagrams and flat colourLossless25–35% smaller
Photographs saved as PNGLossy at 8580–95% smaller

PNG to WebP FAQ

Does PNG to WebP lose quality?

Not in lossless mode: the pixels are identical, just stored more efficiently, around 26% smaller. Lossy mode does discard detail, which is the right trade only for photographic content.

Is transparency preserved?

Yes, in both lossless and lossy modes. WebP has a full alpha channel, so a transparent logo stays transparent.

Should I use lossless or lossy?

Lossless for logos, icons, screenshots, and anything with sharp edges. Lossy only if the PNG is really a photograph, where the savings are far larger.

Will WebP work everywhere?

In browsers, yes. Outside them there are gaps: some desktop software and email clients still refuse it, so keep a PNG for files you need to email.

How much faster will my site be?

It depends how image-heavy it is, but images are the most common cause of slow pages, and this cuts their weight by a quarter with no visual change.

Are my images uploaded?

No. Encoding runs on the canvas in this browser tab.

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