PNG to WEBP Converter

Convert PNG images to WEBP and keep every transparent pixel where it was. WEBP supports a full alpha channel, so logos, icons and cut-out product shots survive intact while the file itself gets considerably lighter.

Your files never leave this device

Convert your files Up to 20 files · 30 MB each

Drag & drop PNG images here

Transparency is preserved. Set the slider to 100% for a lossless WEBP copy.

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WEBP quality

90%

100% asks the browser for a lossless WEBP. Lower values trade exactness for a much smaller file.

How to use this PNG to WEBP converter

Drag your PNG files onto the dropzone above, or press Browse files to select them.
Decide on the slider. Use 100% for logos, diagrams and screenshots, and 85 to 90% for photographic content.
Check the queue and remove anything you did not mean to add.
Press Convert to WEBP and wait for the progress bar to finish.
Look at the saving reported for each file, then download them individually or as one ZIP.

What makes this converter useful

Preserves the alpha channel completely, including semi-transparent edges and soft shadows.
Offers a genuinely lossless mode at the top of the slider, not just a very high lossy setting.
Reports the before and after size for each file so you can see whether the trade was worth it.
Converts twenty files in one pass without asking you to repeat yourself.
Leaves pixel dimensions untouched, so nothing is silently resized.
No watermark, no account and no cap on how many batches you run.

WEBP does something PNG cannot

PNG has one compression mode and it is lossless. Every pixel is recorded exactly, which is perfect for a logo with four flat colours and wasteful for a screenshot of a photograph. WEBP offers both modes in one format, and that is the whole reason this conversion is worth doing.

Choose the lossless mode and you get a file that is pixel for pixel identical to the PNG, usually 20 to 30 per cent smaller simply because WEBP's lossless algorithm is newer and better. Choose the lossy mode and the savings become dramatic, often 70 per cent or more on images with photographic content, at a cost in exactness that is frequently invisible.

Transparency survives either way

This is the point people most often need reassuring about, because the older comparison was PNG against JPG, and JPG has no alpha channel at all. WEBP does. A logo with a soft drop shadow, an icon with anti-aliased curves or a product photograph with the background removed all convert without a white box appearing behind them.

Fully transparent pixels stay fully transparent.
Semi-transparent pixels keep their exact opacity in lossless mode and very close to it in lossy mode.
Anti-aliased edges stay smooth rather than developing a hard fringe.
Images with no transparency at all simply convert with the alpha channel unused.

Choosing the slider position

The nature of the image matters more than the file size does. Flat graphics with a limited palette, meaning logos, icons, charts, diagrams and interface screenshots, belong at 100 per cent. They compress extremely well losslessly, and lossy compression puts visible ripples around the hard edges and lettering they are made of.

Photographic content is the opposite case. A photograph saved as PNG is already a poor fit for the format, and lossy WEBP at 85 to 90 per cent will often produce a file a fraction of the original size with no difference you can point to. Screenshots that contain both, such as an interface with a photograph inside it, are a judgement call, and comparing two conversions takes less time than reasoning about it.

Where PNG still wins

Keep the PNG when the file has to be opened by software rather than a browser. Desktop image editors, print pre-flight checks, some CMS uploaders and plenty of document tools still handle PNG faultlessly and WEBP badly or not at all. Keep it too when the image is a master copy you will edit repeatedly, because every lossy save compounds the previous one.

The sensible arrangement is to keep PNG masters and serve WEBP. If you need to reverse the conversion the WEBP to PNG converter handles it, and if you would rather stay with PNG and simply make it smaller, the PNG compressor does that without changing format at all.

Everything happens on your device

The PNG is decoded by your browser, painted onto an off-screen canvas and re-encoded as WEBP, all inside this tab. No file is uploaded, no server sees your artwork and nothing is stored for later. Unreleased branding, client work and internal screenshots stay exactly where they are, which is also why the tool keeps working if your connection drops after the page has loaded.

Frequently asked questions

Does WEBP keep PNG transparency?

Yes. WEBP supports a full alpha channel in both its lossless and lossy modes. Transparent and semi-transparent pixels survive the conversion, so no white background appears behind a logo or cut-out.

How do I get a lossless WEBP?

Set the quality slider to 100 per cent. At that setting the browser encodes a lossless WEBP that is pixel for pixel identical to the PNG, and usually 20 to 30 per cent smaller than it.

Which quality setting should I use?

Use 100 per cent for logos, icons, charts and interface screenshots, where hard edges and text show artefacts easily. Use 85 to 90 per cent for photographic content, where the saving is large and the loss is invisible.

Why is my PNG so much bigger than the WEBP?

PNG records every pixel exactly and has no option not to. That suits flat graphics and suits photographs very badly. WEBP can choose, which is why a photographic PNG often shrinks by 70 per cent or more.

Should I delete my PNG files afterwards?

Not usually. Keep the PNG as your master copy for editing and for software that will not read WEBP, and use the WEBP for anything served to a browser.