PNG to WEBP converter
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Turn heavy PNGs into compact WEBPs for websites and apps, transparency included.
This page is for people building or running websites, online shops and apps. PNG is often the heaviest thing on a web page, and WEBP is the usual cure: every current browser shows it, it supports transparency like PNG does, and for photos and product shots the files are a fraction of the size. Convert a whole folder of exported graphics or screenshots here, without uploading them anywhere, and swap them into your site.
How to convert PNG to WEBP
- Drop your PNG files: product shots, hero images, screenshots or icons.
- Keep quality at 85 for photos; try 90–95 for screenshots with small text. Set a max size such as 1920 px if the originals are larger than they’ll ever be displayed.
- Convert and download the WEBPs, or a ZIP of the lot.
What happens to quality, size and metadata
This conversion uses lossy WEBP, so some invisible detail is discarded in exchange for a much smaller file. At the default quality of 85, photos look the same as the PNG; flat graphics may show faint softening along sharp coloured edges, which a higher quality fixes. Transparency is kept, including soft shadows and anti-aliased edges.
If a source PNG holds camera data, it isn’t carried over: WEBP files from this tool contain no EXIF. The savings are largest on photo-like PNGs and smallest on simple icons that were already tiny.
- Test files
- 30
- Average input
- 14.7 MB
- Average output
- 1.2 MB
- Size change
- 92% smaller
- Time per file
- 897 ms
PNG vs WEBP
| Full name | PNG | WEBP |
|---|---|---|
| Full name | Portable Network Graphics | WebP |
| Introduced | 1996 | 2010 |
| Defined by | W3C · ISO/IEC 15948 | Google · RFC 9649 |
| Compression | Lossless | Lossy or lossless |
| Transparency | Yes | Yes |
| Animation | Yes | Yes |
| Largest size | 2,147,483,647 × 2,147,483,647 px | 16,383 × 16,383 px |
| Chrome / Edge | Yes | Yes |
| Safari | Yes | Yes |
| Firefox | Yes | Yes |
| Windows | Yes | Yes |
| iPhone / iPad | Yes | Yes |
| Android | Yes | Yes |
| Typical use | Screenshots, logos, icons, diagrams and any image that needs a transparent background. | Images on websites and in apps, where small files mean faster pages. |
PNG PNG is a lossless image format published by the W3C in 1996 and later as ISO/IEC 15948. Every pixel is kept exactly, and it supports full transparency, which makes it ideal for screenshots, logos and text. Photos saved as PNG are usually several times larger than as JPG.
WEBP WebP is an image format Google released in 2010, documented as RFC 9649. It has a lossy and a lossless mode, transparency and animation, and is usually 25–35% smaller than JPG or PNG at similar quality. Websites use it heavily, but some desktop apps and upload forms still refuse it.
Sources for this table
- www.w3.org/TR/png-3/
- www.iso.org/standard/29581.html
- caniuse.com/apng
- developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats/Image_types
- developer.android.com/media/platform/supported-formats
- www.rfc-editor.org/rfc/rfc9649
- developers.google.com/speed/webp/faq
- caniuse.com/webp
Browser support data: caniuse.com, CC BY 4.0.
Without this site
Windows and macOS can open WEBP files but have no built-in way to save them: Paint and Preview don’t list WEBP in their export formats. Image editors and command-line tools can do it, and most website builders and content systems convert uploads to WEBP on their own servers. A browser page like this one is the quickest no-install way when you want the WEBP files yourself.
Troubleshooting
- Very old software. Some older desktop apps and email clients don’t display WEBP. Keep PNG or JPG copies for those uses.
- Tiny icons get bigger. A 2 KB icon may not shrink. Leave such files as PNG or use an SVG.
- Text edges look soft. Raise quality to 90–95 for screenshots and UI images.
- Safari. Safari can’t write WEBP itself, so on Safari we load a small encoder once; conversion then works the same way.
Questions and answers
How much smaller is WEBP than PNG?
For photos and product shots saved as PNG, lossy WEBP is usually many times smaller; our benchmark table above shows the figure for a typical set. For logos and icons with few colours the gain is modest, and occasionally none. The bigger and more photographic the PNG, the larger the saving.
Does WEBP support transparency?
Yes. WEBP has a full alpha channel, so transparent backgrounds, soft shadows and smooth edges come through exactly as in the PNG. That is the main reason to choose WEBP over JPG for logos and cut-out product images on a website.
Do all browsers support WEBP?
All current major browsers do: Chrome, Edge, Firefox, Opera and Safari (since Safari 14 on macOS Big Sur and iOS 14). For a public website that covers practically every visitor. If you must support very old systems, serve a PNG or JPG fallback with the picture element.
Should I convert all my website images to WEBP?
Photos, banners and product images, almost always: they load faster and look the same. Simple logos are better as SVG, and tiny icons may gain nothing. Keep your original PNGs as masters, since WEBP at quality 85 is lossy and you don’t want to re-compress it again and again.