PNG to WebP converter
Free PNG to WebP converter in your browser. Files stay on this device. Nothing is uploaded.
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Drop images here
or click to choose. Paste works too.
Files never leave this device. Conversion runs in your browser.
Why convert PNG to WebP?
PNG screenshots and UI assets shrink dramatically as WebP while keeping transparency. Prefer WebP for the web; keep PNG when a partner still requires it.
What changes in the file
- WebP uses lossy compression — choose quality carefully for sharp graphics
- Transparency is supported in the WebP output
- You can resize, adjust quality where relevant, and strip EXIF on export
- Conversion runs on this device — the file is not uploaded
How to convert PNG to WebP
- Drop one or more PNG files onto the converter (or pick them from disk).
- Confirm the output is set to WebP, then adjust quality, size, or metadata if needed.
- Download the converted WebP file — processing never left your browser.
Why WebP from PNG
PNG is a lossless raster with optional alpha — the interchange staple for screenshots and UI. WebP (Google) can encode lossy or lossless stills and can keep transparency. For a website, a PNG screenshot often shrinks sharply as WebP without the muddy JPEG edges on type, because you can keep a lossless WebP or a high-quality lossy one with alpha.
Formatly encodes WebP through the browser canvas encoder in this tab. Support is broad in current Chrome, Firefox, Safari, and Edge. The holdouts are some email clients, older desktop publishers, and print RIPs that still want PNG or TIFF.
When to stay on PNG
Keep PNG when a partner’s pipeline names .png in a spec, when a design tool’s importer is picky, or when you need a file that Photoshop-era workflows open without a plugin. Do not convert if the next step is a print vendor that has never heard of WebP.
Lossless WebP can replace many UI PNGs. Lossy WebP is for photographic content inside a PNG container. If you flatten a transparent UI to lossy WebP at low quality, glyphs suffer the same way they do in JPEG. Use the quality control and zoom to 100% on text.
Alpha and re-encoding
Unlike JPEG, WebP can store alpha, so a logo with a hole can remain a logo with a hole. Canvas encoding still produces a new compressed file; it is not a bit-identical PNG wrapper. Very large 16-bit PNGs are flattened to what the browser can put on a canvas (8-bit per channel in practice).
If you only needed a smaller PNG, try WebP first for the web, and keep the original PNG as the master.
No file upload in Network
In the Network panel, converting PNG to WebP should not send the image bytes to Formatly as a conversion request. The WebP you save is encoded locally. Script downloads for the app are not your screenshot.
About PNG
PNG is a lossless raster format with optional transparency. Pixels are preserved exactly, so it is the usual choice for screenshots, UI, logos, and any image that needs a clean alpha channel.
About WebP
WebP is a modern web image format from Google. It can encode lossy or lossless images and supports transparency, often beating JPG and PNG on size at similar visual quality.
Common questions
Is this PNG to WebP converter free?
Yes. Formatly converts PNG to WebP in the browser at no charge and without an account.
Do you upload my PNG files?
No. Decoding and encoding run locally with browser APIs and WebAssembly codecs when needed. Files stay on this device.
Will converting PNG to WebP reduce quality?
WebP is lossy, so you trade some detail for smaller files. Use a higher quality setting when fidelity matters.