Free converter · Lossless transform
Convert WebP to PNG
Short answer
Drop your WebP file into the converter below and download the PNG file. It runs in your browser with the Canvas API; nothing is uploaded. The pixels are saved as a lossless PNG; transparency is kept, without further loss. Detail the WebP compression already removed does not come back, and the file is usually larger.
WebP to PNG; PNG is lossless but cannot restore lossy WebP detail. · Lossless transform · Browser-side via Canvas - nothing uploaded.
Key takeaways
- PNG stores the decoded pixels without loss, so the conversion adds no new loss.
- The size grows a lot: our 2,224,544 byte WebP became a 29,284,800 byte PNG (13.2 times bigger).
- PNG cannot restore detail that lossy WebP discarded; the picture looks the same, only larger.
- Use it when a tool needs PNG or you need to edit repeatedly without further compression.
Measured: WebP to PNG
Measured on a NASA public-domain photograph, 3.1 MB, decoded once to a fixed RGB reference, using the same steps this converter runs in the browser (draw to a canvas, JPEG gets a white background, encode at quality 0.92), run in headless Chromium. Other browsers use their own encoders, so sizes can differ. Results describe this photograph.
The WebP input was made from the fixed RGB reference with libwebp quality 85 and compression level 6.
| Check | Result |
|---|---|
| Input | WebP, 2,224,544 bytes, 3840 × 3877 px |
| Output | PNG, 29,284,800 bytes (13.2 times bigger) |
| Dimensions | 3840 × 3877, unchanged |
| Quality change | None added: PNG is lossless |
The size jump happens because lossless PNG has to describe every pixel exactly, while lossy WebP described them approximately.
WebP vs PNG
| WebP | PNG | |
|---|---|---|
| Full name | WebP (Google) | Portable Network Graphics |
| What is inside | Lossy or lossless compressed pixels | Pixels compressed without loss |
| Compression | Lossy or lossless | Lossless |
| Transparency | Transparency supported | Transparency supported |
| Best for | Smaller images on websites; social platforms mostly document JPEG and PNG instead | Screenshots, logos and graphics with text |
What you get
A lossless PNG; transparency is kept. WebP to PNG; PNG is lossless but cannot restore lossy WebP detail.
When PNG makes sense
- A program you use accepts PNG but not WebP.
- You will edit the image several times and want no more compression between edits.
- You need transparency in a format every program reads.
When to keep the WebP
If the WebP is what you will publish, converting to PNG only makes the file bigger. Keep the WebP for the web and the PNG as a working copy.
Questions people ask
Is this WebP to PNG converter free and private?
Yes. It is free, needs no account and runs entirely in your browser, so the file never leaves your device.
Will converting WebP to PNG reduce quality?
No further loss: PNG stores the decoded pixels exactly.
Does WebP to PNG lose quality?
No new loss. PNG is lossless, but it cannot recover what a lossy WebP already removed.
Why is the PNG so much bigger?
Lossless storage needs far more data: 29.3 MB against 2.2 MB in our test.
Will transparency survive?
Yes if the WebP has an alpha channel; PNG supports it.
Can I convert back and save space?
Converting back to a lossy WebP is another lossy encode; keep your original source instead.
More converters
Sources and how we checked
- MDN: Media container formats
- MDN: Web audio codec guide
- MDN: Image file type and format guide
- FFmpeg documentation: stream copy
- FFmpeg Documentation: ffmpeg (stream selection, -map, -c copy) (read 2026-10-08)
- Google Developers: An image format for the Web (WebP) overview (read 2026-10-08)
- Wikimedia Commons: Buzz salutes the U.S. Flag (NASA, public domain), the photo used for the image measurements (read 2026-10-08)
Reviewed October 8, 2026. What the converter writes was measured with ffprobe on the same FFmpeg build your browser downloads; format descriptions follow MDN's media guides.