What WebP Converter helps you do

Convert a PNG or JPEG image to WebP for a smaller file, or decode a WebP back to PNG or JPEG when a CMS or older design tool cannot open it. The export runs at high quality in the browser, so the image never has to be uploaded to a conversion service. It handles one image per run, which makes it easy to check the result before replacing an asset.

Conversion runs locally in your browser. Your images never leave your device.

How it works

The image is decoded by the browser and drawn to a canvas at its natural dimensions. The selected output format is encoded at a high quality setting and returned as a Blob for preview and download. Transparency survives into WebP and PNG; JPEG has no alpha channel, so transparent areas are flattened.

How to use WebP Converter

Drop an image and choose WebP, PNG or JPEG as the output.
Convert and preview the result against the source.
Download the converted file and keep the original.
If an app rejects WebP, convert that copy back to PNG or JPEG.

When to use it

Shrink hero images before deploying a static site or landing page.
Deliver WebP to modern browsers while keeping PNG fallbacks elsewhere.
Convert downloaded WebP assets to PNG for legacy design tools.
Replace a large JPEG with a smaller WebP for a gallery.
Check whether a WebP file opens correctly after conversion.
Prepare an image for a CMS that accepts only PNG or JPEG.

When not to use it

Do not convert a transparent logo to JPEG and expect the alpha channel to survive.
Do not convert an already compressed WebP to JPEG repeatedly; each pass loses a little quality.
Do not expect this tool to resize or crop; use the resizer or cropper first.

Example

A 1.8 MB hero JPEG is converted to WebP at the tool's high-quality setting and drops below 600 KB with no visible change at the displayed size. The original JPEG is kept for an email template that does not support WebP.

What you can do with WebP Converter

Convert PNG, JPEG or another browser-readable image to WebP.
Convert WebP back to PNG or JPEG.
Preview the converted image before downloading it.
Preserve transparency in WebP and PNG output.
Export at the source pixel dimensions.
Keep the image on your device.
Choose the output format before converting.

Example: replace a heavy hero image

Drop the original PNG or JPEG and choose Convert to WebP. Compare the preview with the source; a photo usually looks identical at this quality, while flat graphics may show slight edge differences.

Download the WebP and check its size against the original. If the saving is small, the source may already be compressed or the image may not suit WebP.

Keep the original for browsers or tools that still require PNG or JPEG, and update the page to serve the WebP with a fallback.

What to know before you start

One image per conversion.
The quality setting is fixed at a high value; there is no quality slider.
JPEG output flattens transparency.
The output keeps the source dimensions; no resizing is applied.
Browser support determines which input formats can be decoded.

Common mistakes

Using JPEG output for a logo with a transparent background.
Converting the same image back and forth between lossy formats.
Assuming every browser or CMS accepts WebP.
Replacing the original asset before checking the converted file.
Expecting a resize from a format conversion.
Converting a PNG screenshot to JPEG and losing crisp edges around text.

Troubleshooting

If the output is larger than the source, the source was already efficiently compressed; keep it or try PNG for a flat graphic.

If a tool refuses the WebP file, convert it back to PNG or JPEG for that tool.

If transparent areas turn dark, JPEG output was chosen; re-export as WebP or PNG.

If the preview does not load, the source format may not be decodable by the browser.

If the image looks soft, the source may have been upscaled or already compressed; start from the highest-quality original.

If the file size barely changes, the source may already be WebP or well compressed; compare at the display size before replacing it.

If an alpha channel disappears, JPEG was selected; re-export as WebP or PNG.

If the converted file will not open in an old app, convert it back to PNG or JPEG for that app.

If the output dimensions look wrong, the source may have a rotation flag that the canvas ignores; correct the orientation first.

WebP Converter