How to convert PNG to WebP
- Drop in your images. Supported image formats can go in together — there is no need to sort them by format first.
- Tick the ones you want in this round. Everything you add starts selected; untick anything you want to skip.
- Choose Export as — it starts on WebP, and set the quality you want.
- Press Export. One file downloads directly; two or more arrive as a single ZIP.
Your files stay in the workspace after an export. Change the selection, switch the output format, and export again — you never re-upload.
Transparency survives
This is the main reason to pick WebP over JPG. WebP has a real alpha channel, so a PNG with a cut-out background stays cut out — nothing is painted underneath, and no background colour has to be chosen. That is why this page has a quality control but no Background option: there is nothing to composite onto.
If you need the transparency and an exact copy of every pixel, export as PNG instead. WebP here is a lossy encoder.
Quality, and what it actually does
- Quality is a whole number from 1 to 100, and it starts at 85. Higher quality usually means a larger file.
- There is no lossless mode. The browser's WebP encoder only accepts a single quality number, so this page cannot promise lossless WebP — and does not.
- The setting applies to every file in the export you are running. Change it and export again to compare.
A smaller file is likely for photographs and detailed artwork. It is not guaranteed: small or flat images — icons, simple logos, screenshots of plain UI — can come out larger after re-encoding, because the container and colour-profile overhead outweighs the pixels. If size matters, compare the downloaded file with the original before you keep it.
What this page supports
- Input: PNG, plus JPG/JPEG (including .jfif), WebP, AVIF and BMP if you want to mix them into the same batch.
- Output: WebP by default; PNG and JPG are one dropdown away.
- Transparency: preserved. No background colour is applied.
- Same format in and out: a WebP exported as WebP is re-encoded at your chosen quality, not passed through untouched — otherwise the setting would apply to some files and not others.
- Animated WebP: one still frame is exported. The animation is not preserved.
- Metadata: EXIF, ICC colour profiles and similar embedded data are not carried over.
- Browser support: WebP export is checked against your actual browser when the page loads. If it cannot encode WebP, the option is shown as unavailable — never silently swapped for PNG.
- Batch: files are processed one at a time so memory stays predictable; duplicate output names are numbered automatically.
If one file fails to decode, it is marked failed and the rest of the batch continues.
Questions
Are my images uploaded?
No. Everything happens inside your browser tab: files are read from disk into memory, redrawn, and re-encoded locally. Nothing is sent to a server, and there is no server-side copy to delete afterwards. You can watch the network panel while you convert — it stays quiet.
Will transparency stay transparent?
Yes. WebP supports an alpha channel, so transparent areas of your PNG stay transparent in the WebP. Nothing is flattened onto white or any other colour — that is why there is no background control on this page. Exporting to JPG is the case where transparency cannot survive, and that page asks you to choose a fill colour.
What quality should I use?
85 is a sensible default and is what the page starts with. For photographs you can usually drop to 70–80 without a visible difference; for graphics with hard edges and text, staying at 90 or above avoids fuzzy edges. Rather than guess, export once, compare the downloaded file with the original, and export again with a different number — your files stay in the workspace, so a second run costs nothing.
Will WebP always be smaller than PNG?
No. It usually is for photographs and complex images, but a small or flat PNG can grow. Re-encoding is not compression magic: the WebP container has its own overhead, and browsers embed a colour profile in the output. Compare the downloaded file with the original before you keep it.
Does this create lossless WebP?
No. WebP as a format can be lossless, but the encoder available to a web page only takes a quality number — there is no lossless switch to turn on. If you need an exact copy of the pixels, export as PNG instead.
What if my browser cannot export WebP?
The page still loads and works; the WebP option is shown but disabled, with a line explaining that this browser cannot export WebP. It is never quietly changed to PNG behind your back — you would have no way to tell you did not get a WebP. Pick PNG or JPG yourself, or try a different browser.