Can WebP keep a transparent background?
Yes, the format supports transparency. Inspect the resulting edges because the color data may still be compressed.
Image WORKBENCH / FREE BROWSER TOOL
Convert PNG images to WebP
Create a WebP version of a PNG for a web workflow. Compare transparent edges and small text before replacing the original.
No signup · File contents stay on this device Files are processed on this device
Drop your files here
JPG, PNG, WebP, AVIF or HEIC images · files stay on your device
or paste an image with Ctrl / Cmd + VUp to 30 files · 20 MiB per file · 80 MiB total
Sequential processing keeps memory use lower.
Processing happens in your browser. File contents are not uploaded. Close the tab to release active files; temporary handoffs use local browser storage. · Privacy details
IMAGE → DOCUMENT WORKFLOW
Sample checks you can repeat
Measured with the listed sample and settings; these may differ from this page’s starting preset. Timings are individual processing-function runs in the stated environment and exclude page loading. Library caches may be warm. These small-file checks do not establish performance or compatibility for every document.
| Sample | Settings | Observed output | Environment |
|---|---|---|---|
| sample-transparent.png (1600 × 1000; 43,511 bytes) ↗ | WEBP; quality 90%; background transparent | approximately 33.8 KB; 1600 × 1000 · 0.10 sec | Chrome · Apple M2 / macOS · 15 Oct 2026 · local test |
Specific tasks
Using this tool
How to use png to webp
- Select the PNG source and keep WebP selected.
- Choose quality for the kind of image, keeping enough detail in text and edges.
- Convert and compare the WebP with the PNG at the size it will be displayed.
Before you start
What to keep in mind
- This browser export should not be treated as a guaranteed lossless WebP conversion.
- A smaller output is not guaranteed for every PNG.
- Check whether the destination accepts WebP, especially older software and upload forms.
- Use at most 30 images, 20 MiB per file and 80 MiB total input. Combined output is also limited to 80 MiB; completed files remain available when a later result exceeds that limit. Each image must stay within 24 million pixels and 12,000 pixels on either side.
Compare one real example before converting a set
A detailed photograph saved as PNG and a flat-color icon are different compression cases. Use representative files and compare actual output bytes and visible detail.
Keep a PNG master
A WebP can be a delivery copy for a website. The PNG remains useful for editing and destinations that require PNG.
Keep transparent artwork while changing its container
PNG-to-WebP is useful when the destination supports WebP and you want to compare its size with a PNG graphic. This preset keeps a transparent background and begins at 90% quality. The browser’s WebP encoder may use lossy encoding at that setting, so preserving an alpha channel does not mean every color pixel is unchanged. Small text and thin outlines deserve a closer check than a photographic background.
Use the supplied transparent PNG to examine both the background and the colored edges. Download one result and reopen it in the application where it will be used. A website content system may recompress uploaded images or reject a format even when your browser can display it. Keep the PNG master for later editing. If the WebP is not smaller or introduces visible artifacts, the original may already be suitable. If a fixed byte limit matters more than a starting quality value, move the result to the compressor and select WebP output there; the byte check is performed on the encoded file, not estimated from the slider.
Check alpha and color detail independently
A transparent background and lossless color are different properties. The WebP result may keep transparent pixels while still changing the colors of fine outlines or small text through the browser’s quality-controlled encoder. This preset does not offer a separate guaranteed-lossless WebP switch. Its 90% starting quality is an encoder input, not a measurement of retained detail.
Compare one representative graphic with the source at the same zoom and against the intended background. Read the actual bytes before replacing a PNG merely for a smaller-looking format name. If the WebP saves no useful space or the destination rejects it, retain the PNG. A batch shares these output settings, so test an icon and a photograph separately when both are present.
Common questions
About png to webp
Is this useful for a screenshot?
It can be, but small text and sharp lines need close inspection. Keep PNG when the output loses important detail.
Does selecting maximum quality guarantee identical pixels?
No. Do not infer lossless encoding from the quality control alone.
Where is the image converted?
Its contents are decoded and encoded in this browser. The website and any required decoder files load normally, but your chosen image is not uploaded to a conversion API. Initial preparation can require an internet connection.
Can I continue with another image operation?
Yes. After conversion, use the next-step actions to pass successful result files to another compatible tool through temporary local browser storage. Download a copy if you need a lasting artifact.