Convert PNG to WebP free in your browser. Batch convert, set the quality and download instantly. Your images are never uploaded.
Add your PNG files, adjust the settings and download WebP files. Everything runs in your browser, so your images are never uploaded.
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To convert PNG to WebP online, add your PNG files above, choose lossy (smaller) or lossless (exact pixels) mode, press Convert and download the WebP files. Google reports that lossless WebP is about 26 percent smaller than PNG. Transparency is kept. Nothing is uploaded.
Convert PNG graphics and screenshots to WebP to cut file size while keeping transparency. Choose lossless mode for exact pixels, or lossy mode for photographs and the smallest files. It is a free tool from Websolindia, a New Delhi website design and SEO company that builds fast, image-optimised websites.
Unlike most online converters, this tool does not upload your images. Your browser decodes each PNG file, converts it and creates the WebP file on your own device. That keeps private photos private, avoids upload waits and keeps working on a slow connection once the page has loaded. You can convert up to 50 files at a time and download them one by one or together as a ZIP.
Need to go the other way? Use our WebP to PNG Converter Online. For related jobs, try the PNG to JPG Converter Online, or browse every tool in the Websolindia image converter collection. To see how much smaller images improve your page speed, test the page with our Website Performance Analyzer.
This table compares the two formats so you can decide whether converting is the right move.
| Feature | PNG | WebP |
|---|---|---|
| Full name | PNG (Portable Network Graphics) | WebP (developed by Google) |
| Origin | W3C Recommendation in 1996 | Released by Google in 2010 |
| Compression | Lossless | Lossy and lossless |
| Transparency | Yes, full alpha (256 levels of transparency) | Yes, in both lossy and lossless modes |
| Animation | No (animated PNG is a separate extension) | Yes |
| Colour depth | Up to 16 bits per channel | 8 bits per channel |
| Typical file size | Large for photos, small for flat graphics | Usually smaller than JPG or PNG |
| Best for | Logos, screenshots, graphics and anything needing transparency | Website images where speed matters |
| Browser support | Every browser, app and device | Chrome, Edge, Firefox and Safari 14+ (all current browsers) |
| File extension | .png | .webp |
File size: Google reports lossless WebP images are 26 percent smaller than PNGs; lossy WebP can be much smaller still.
This is exactly what happens to your file. Nothing is hidden, and you can verify that nothing is uploaded by watching your browser's network tab while you convert.
| Step | What happens |
|---|---|
| 1. Read the file locally | Your browser reads the file from your device into memory. Nothing is sent to a server. |
| 2. Identify the format | We check the file's first bytes (its signature) instead of trusting the extension, so a PNG renamed to .jpg is still handled correctly. |
| 3. Decode the PNG to pixels | The image is decoded to raw red, green, blue and alpha pixels using your browser's built-in PNG decoder. |
| 4. Resize (optional) | If you set a maximum width, larger images are scaled down with an area-weighted filter. Images are never enlarged, and the proportions are always kept. |
| 5. Keep transparency | Transparency passes straight into the WebP file, because WebP supports it. |
| 6. Encode the WebP | The pixels are written out as WebP using your browser's WebP encoder for lossy output, or libwebp compiled to WebAssembly for lossless output and for browsers without a WebP encoder. Metadata such as camera details and location is not copied. |
| 7. Report the result | We show the dimensions, the sizes before and after, and the change: (new size − original size) ÷ original size × 100. For example, 500 KB becoming 350 KB is −30%. |
| Setting | Default | Range | What it does |
|---|---|---|---|
| Quality | 85 | 1–100 | Higher gives a sharper, larger WebP. 80–90 suits most images. |
| WebP mode | Lossy | Lossy / Lossless | Lossless keeps every pixel exactly but makes larger files. |
| Maximum width | None | 1–20,000 px | Scales larger images down. Never enlarges. |
| What | Formula | Notes |
|---|---|---|
| Size change | (new − original) ÷ original × 100 | Shown for every file. Negative means smaller. |
| Downscale factor | min(1, maximum width ÷ width) | Applied only when you set a maximum width; never above 1. |
| Quality | Passed to the encoder as a number from 1 to 100 | The scale is encoder-specific, so the same number gives different results in different formats. |
Speed depends on your device and the image size. In our Chrome tests on a desktop-class processor, a 6-megapixel photograph took about 2 seconds to convert to WebP or PNG. AVIF is the slowest: about 2.5 seconds on Fast and about 7.5 seconds on Balanced. Phones and older laptops take longer, and images over about 120 megapixels are declined rather than risking a frozen browser.
| Format | Where it opens | Typical use |
|---|---|---|
| PNG | Every browser, app and device | Logos, screenshots, graphics and anything needing transparency |
| WebP | Chrome, Edge, Firefox and Safari 14+ (all current browsers) | Website images where speed matters |
| This converter | Current Chrome, Edge, Firefox and Safari. Needs JavaScript | Private conversion on your own device |
Serve WebP to browsers that support it and keep a JPG fallback for the rest, using the HTML picture element.
<picture>
<source srcset="photo.webp" type="image/webp">
<img src="photo.jpg" alt="Describe the image" width="1200" height="800" loading="lazy">
</picture>Google reports that lossless WebP images are about 26 percent smaller than PNGs. Lossy WebP can be far smaller, especially for photographs, at the cost of some detail.
Yes. WebP supports a full alpha channel in both lossy and lossless modes, so cut-outs, logos and shadows stay transparent.
Use lossless for logos, line art, text and anything that must stay pixel-exact. Use lossy for photographs and other complex images where you want the smallest file.
Yes. All current browsers support it, and Google Search can index WebP images. Keep PNG as a fallback only if you must support very old browsers.
Current versions of WordPress and most modern CMS tools accept WebP uploads. If a platform refuses it, convert back using the WebP to PNG Converter Online.
AVIF can be smaller still but encodes more slowly and is supported by slightly fewer programs. See the PNG to AVIF Converter Online if you want the smallest files.
Yes. It is free, needs no sign-up, adds no watermark and has no daily limit. You can convert up to 50 PNG files in one go. It is provided by Websolindia.
No. Your PNG files are read and converted inside your browser, on your own device. They are never sent to Websolindia or anyone else, which is why this converter is safe for private photos and documents.
Yes. The new file is created from the decoded pixels, so camera details, GPS location and other embedded metadata are not copied. If you need to keep metadata, use a desktop editor.
Up to 50 files per batch and 150 MB per file. Images above roughly 120 megapixels are declined with a clear message rather than freezing your browser.
Current versions of Chrome, Edge, Firefox and Safari.
Websolindia built it. We are a New Delhi website design, SEO and digital marketing company serving businesses since 2014. We also build fast websites with properly optimised images; see our website designing and SEO services.
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