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Convert PNG to WebP
WebP has a lossless mode, and it is the reason this conversion is worth doing: the output decodes to exactly the same pixels as the PNG and is usually far smaller. Measured here, an 800 x 600 screenshot went from 67 KB to 20 KB - 70% smaller, byte for byte identical once decoded; how much you save depends on how efficiently your PNG was written in the first place, so the page shows the real figures for your file. Screenshots, logos, diagrams and anything with flat colour or sharp text benefit most, because those are precisely the images PNG stores inefficiently and lossy formats damage. Everything runs in your browser.
How to convert PNG to WebP
- Drop one PNG or a folder of them onto the upload area.
- Lossless is on by default. Turn it off only if you want a smaller file and can accept some loss.
- Compare the sizes before and after.
- Download the WebP, or the whole batch as a ZIP.
Supported formats
This tool accepts PNG files. Everything is decoded by your own browser, so the formats available depend on what your browser can open - which for HEIC in particular varies between Safari and other browsers.
Because the image is rebuilt from raw pixels, EXIF metadata such as camera details, timestamps and GPS coordinates does not carry into the result. Orientation is applied to the pixels first, so photographs stay the right way up. Embedded colour profiles are also dropped and the output is saved as sRGB, which can shift colours slightly in wide-gamut photographs. Animated files are refused rather than being flattened to a single frame.
Frequently asked questions
Does converting PNG to WebP lose any quality?
Not with the default setting. WebP is really two formats sharing one name - a lossy one related to JPEG, and a lossless one related to PNG - and this page uses the lossless one unless you say otherwise. The decoded result is identical to the PNG, pixel for pixel, which is why the comparison the page shows you is purely about file size.
How much smaller will my file actually be?
It depends heavily on the picture, and the honest answer is that flat-colour images gain most. Measured on this engine: an 800 x 600 screenshot dropped 70%, a UI graphic with sharp text 76%, and a noisy photograph about 50%. A PNG that was already a photograph saves least, because PNG stores photographs badly and so does everything else. The result panel shows the real numbers for your file rather than an average.
Is transparency preserved?
Yes. WebP carries an alpha channel exactly as PNG does, and the lossless mode reproduces it unchanged, so a logo with a transparent background comes out with the same transparent background. This is the main reason to convert a PNG to WebP rather than to JPEG, which has no alpha channel at all and has to fill those areas with a solid colour.
Why would I not use lossless?
Only when you want a smaller file more than you want the exact pixels - a large photograph saved as PNG, for instance, where lossy WebP will be dramatically smaller and the difference is hard to see. Turning lossless off exposes the quality slider. For screenshots, logos and line art, leave it on: lossy compression puts visible fringes around sharp edges, which is exactly the content this conversion is best at.
Can I convert a whole folder of PNGs?
Yes, and it is the usual case - one screenshot rarely justifies a conversion, but a directory of them does. Every file gets the same setting and the results come back as a single ZIP. Files this browser cannot read are refused by name as you add them, so you find out before the batch runs.
Will WebP open everywhere?
In every current browser, yes. Outside the browser it is less certain: some older desktop applications and a few email clients still do not read it, which is the one real argument for keeping a PNG. If you need maximum compatibility rather than a smaller file, the PNG you already have is the safer choice.
Related tools
- WebP to PNG ConverterConvert WebP to PNG for apps that will not open WebP.
- JPG to WebP ConverterConvert JPG to WebP in your browser and cut file size by 25-35% at the same quality.
- PNG CompressorMake PNG files smaller in your browser while keeping transparency.
- PNG to JPG ConverterConvert PNG images to JPG in your browser with control over quality and background colour.
- Resize for a WebsitePrepare images for your own site: content images, hero banners, thumbnails and blog headers, converted to WebP and kept under a size budget.
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