Free PNG to WebP Converter

How to convert PNG to WebP

1. Drop your PNG files onto the box above, or click Choose files to pick up to 30 images.
2. Set the quality. The default of 85 is a good balance for most web images; lower values give smaller files with more visible artifacts.
3. Click Convert to WebP and watch the progress bar while each file is processed on your device.
4. Compare the new size shown next to each file with the original, then download the WebP files one by one or all together as a ZIP.
5. If a file came out too soft or too large, move the quality slider and click Convert to WebP again.

Why convert PNG to WebP

WebP was designed to make web pages load faster. For photos and detailed graphics, a WebP file is usually much smaller than the same image as a PNG, while still supporting a transparent background. Smaller images mean faster pages, which visitors notice and search engines measure.

All current versions of Chrome, Edge, Firefox and Safari display WebP, so for a website the format is a safe choice. For files you send to people, attach to documents or upload to older services, PNG or JPG is still more widely accepted.

Choosing the quality

This converter uses lossy WebP compression, the same kind of trade-off as JPG. Around 80 to 90 is hard to tell apart from the original for photos and illustrations. Flat graphics with text, thin lines or pixel art show artifacts sooner; if they look blurry, raise the quality or keep them as PNG.

Keep your original PNG files. A lossy WebP cannot be turned back into the exact original, and converting it again later loses a little more detail each time.

Supported files and limitations

• Accepts PNG files. The format is checked from the file's contents, not only its extension.
• Up to 30 files at a time, 50 MB each.
• Images up to 50 megapixels and 16,384 pixels on the longest side. A decoded image needs about 4 bytes of memory per pixel, so a 50-megapixel photo takes around 200 MB while it is processed.
• Files are processed one at a time in a background thread, so the page stays responsive.

Not every browser can create WebP files. Chrome, Edge and Firefox can; Safari has historically not been able to. The converter checks the result and tells you if your browser cannot encode WebP instead of saving a file in the wrong format.

Transparency is kept, but the browser saves pixels only: text chunks, EXIF data and color profiles in the PNG are dropped, and wide-gamut images are converted to sRGB. 16-bit PNG files are reduced to 8 bits per channel.

Animated PNG (APNG) files are converted to a still image of the first frame. The WebP encoder in browsers has no lossless switch here; for pixel-exact WebP files use a desktop tool such as XnConvert.

Privacy and security

Your files are opened and processed by your own browser. The ExeDepot server only delivers this page and its scripts; it never receives your files, their contents or their names. The page loads no third-party scripts or ads, and its Content Security Policy allows connections only back to exedepot.com.

Results exist only in your browser's memory until you download them, and they are discarded when you click Convert more files or close the tab. No online tool can promise perfect security, so keep your browser up to date, and for documents you would never put online consider an offline desktop app such as Caesium Image Compressor.

Frequently asked questions

Does WebP keep the transparent background of a PNG?

Yes. WebP supports an alpha channel, and transparent and semi-transparent areas of the PNG are kept.

How much smaller will my images be?

It depends on the image. Photos and gradients usually shrink a lot, while simple graphics with few colors may gain little or even grow. The converter shows the new size next to the original so you can check.

Is WebP supported everywhere?

Modern browsers all display WebP. Some older programs, email clients and upload forms still expect JPG or PNG, so keep the originals for those.

Why does the converter say my browser cannot create WebP?

Some browsers can display WebP but cannot encode it from a web page; Safari has historically been one of them. Open this page in Chrome, Edge or Firefox to convert.

Is my PNG uploaded anywhere?

No. The image is decoded and re-encoded by your browser on your device, and no file is sent to ExeDepot or anyone else.