PNG to WebP

Free PNG to WebP converter - convert in your browser, no upload, no sign-up.

100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.

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Drop PNG files here or click to upload

Supports multiple files

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About this tool

Turn PNG files into WebP. PNG is a lossless format that keeps transparency, which is why logos, icons and screenshots are usually saved as one; the catch is that a PNG of a photograph is often several times larger than it needs to be. Files usually come out noticeably smaller, because WebP compresses much harder than PNG. WebP is Google's web format, which keeps transparency while compressing far better than PNG, and webP is a lossy format, so a small amount of detail is discarded. At the quality this tool uses that is invisible on a photograph, but fine text and sharp edges - screenshots especially - can soften slightly. Transparency survives the conversion intact, so cut-out logos and icons stay cut out. Nothing is uploaded. Your PNG files are decoded and re-encoded by your own device, so they never travel to a server, there is no queue behind other people's files, and there is no cap on how many you convert.

How to use this tool

  1. Add your PNG filesClick the box or drag PNG images onto it. Nothing is uploaded - your browser reads the files directly.
  2. Let it convertEach image is decoded and re-encoded as WebP on your device. A large batch takes a moment; nothing is queued on a server.
  3. Download your WebP imagesSave them one at a time, or take the whole batch as a single ZIP.

Key features

  • No sign-up, no watermark and no file-count limit.
  • Shows the before and after size of every file, so you can see what the conversion cost or saved.
  • Batch conversion - drop a whole folder and convert it in one pass.
  • Converts PNG to WebP without uploading anything.
  • Works offline once the page has loaded.

Common uses

  • Opening a PNG in software that only accepts WebP.
  • Preparing PNG images for a platform that rejects the format on upload.
  • Converting a batch of PNG files handed over by a client or a colleague.
  • Getting PNG images into a document, presentation or email that refuses to embed them.
  • Shrinking site images before publishing, without paying for an image CDN.

Tips for better results

  • Confirm your platform accepts WebP before publishing - most modern websites do, most print shops and older desktop apps do not.
  • Batch the whole folder in one pass - converting one file at a time is the slow way to do this.
  • Convert from the highest-quality PNG you have, not one that has already been resized or re-saved.

Mistakes to avoid

  • Expecting WebP to repair a low-quality PNG. Conversion changes the container, never the pixels already inside it.
  • Renaming the file extension by hand instead of converting. That changes the name, not the data, and the file simply fails to open.

Supported formats

  • PNG
  • WebP

Frequently asked questions

Drop your PNG files onto the box above and download the WebP results. It all happens on your device - no upload, no account, no queue.

WebP is a lossy format, so a small amount of detail is discarded. At the quality this tool uses that is invisible on a photograph, but fine text and sharp edges - screenshots especially - can soften slightly.

Yes. Add as many as you like and they are processed together, then download them one by one or as a single ZIP.

Transparency survives the conversion intact, so cut-out logos and icons stay cut out.

Yes. The converter runs in the browser, so it works on iPhone and Android as well as desktop, without installing an app.

No. The conversion uses your own device's image engine, so your PNG files never leave your computer. That also means it works with confidential material and on a slow connection.

Files usually come out noticeably smaller, because WebP compresses much harder than PNG.

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