PNG to WebP Converter

Convert any PNG into a lighter WebP file while keeping full transparency. It is perfect for shrinking logos, icons, and web graphics. Everything runs in your browser, so there is no upload needed.

No uploadKeeps transparencySmaller files

100% browser-based. Your files never leave your device — we couldn't see them if we tried.

How to convert PNG to WebP (10 seconds)

1

Drop your PNG

Drag and drop your PNG file onto the converter. Up to 50MB.

2

Instant preview

See your image immediately. No upload to any server.

3

Convert

Click Convert to WebP. The conversion happens entirely in your browser using the Canvas API.

4

Download WebP

Download your smaller WebP file with transparency intact. Ideal for logos and web graphics.

Why convert PNG to WebP

PNG has long been the go-to format for graphics that need transparency, but it can produce heavy files. WebP solves that. It supports the same alpha channel transparency as PNG, so your see-through backgrounds and soft edges survive the conversion, yet the resulting file is usually far smaller. WebP also offers two modes: lossless, which keeps every pixel exactly and works beautifully for crisp logos and flat-color artwork, and lossy, which compresses harder for photographic content where a tiny quality trade is worth the size win.

That mix makes WebP ideal for logos, icons, and graphics that live on websites and apps, where every kilobyte affects load time. There are still moments to keep PNG, though. If you have to hand the file off to an older editor or a workflow that does not understand WebP, or a client insists on PNG for delivery, stay with the original. For everything aimed at the modern web, converting PNG to WebP trims weight without giving up the transparency you rely on.

Other converters you might need

JPG to WebP →WebP to PNG →Compress Image →Complete WebP Converter Guide →

Measured: how small WebP gets compared with PNG

We measured this on twelve of the illustrations used on this site. Each one was saved as a PNG and as a WebP at three quality settings.

FormatTotal for 12 imagesShare of the PNG size
PNG4,757,432 bytes100 percent
WebP at quality 90544,780 bytes11.5 percent
WebP at quality 80382,304 bytes8.0 percent
WebP at quality 75324,564 bytes6.8 percent

At quality 90 the WebP files were about a ninth of the PNG size. For photographs and shaded illustrations, that is the kind of saving that noticeably speeds up a page.

Transparency comes along

WebP keeps transparency in both of its modes. It stores the transparency channel separately from the colours, so edges stay clean even when the colours are compressed. We tested this on this site's own 512 pixel app icon, a flat graphic with a transparent background.

Version of the iconSizeShare of the PNG size
PNG108,851 bytes100 percent
WebP, lossless72,832 bytes66.9 percent
WebP at quality 90, with transparency23,066 bytes21.2 percent

Even the lossless WebP, with every pixel identical to the PNG, was a third smaller. This converter uses WebP's quality slider, which is what produces the larger savings. For logos and graphics with crisp edges, keep the slider at 90 or above.

Frequently asked questions

Does WebP keep PNG transparency?+
Yes. WebP supports a full alpha channel just like PNG, so transparent backgrounds and soft edges carry over cleanly. Your logo or cutout graphic will still sit nicely on any colored background after conversion.
How much smaller will the file be?+
It varies with the image, but WebP is often dramatically smaller than PNG for the same picture, especially for graphics with flat colors and text. Many logos and UI assets drop to a fraction of their PNG size.
Is WebP lossless or lossy?+
WebP supports both. Lossless mode preserves every pixel and is great for sharp graphics, while lossy mode squeezes the file harder and suits photographic content. This tool produces WebP that keeps your transparency either way.
When should I keep PNG instead?+
Stick with PNG if you need to hand the file to an old tool or workflow that does not read WebP, or if a client specifically requests PNG. For anything destined for the modern web, WebP is the lighter choice.
Is the conversion private?+
Completely. Your image never leaves your browser. There is no server upload. The conversion uses your device's Canvas API.
How much smaller is WebP than PNG?+
In our measurement, WebP at quality 90 came to about a ninth of the PNG size on shaded illustrations. On a flat icon with transparency it came to about a fifth.
Does WebP keep sharp edges on logos?+
At high quality settings, yes. For graphics with crisp edges and flat colour, keep the quality at 90 or above so the edges stay clean.
Is lossless WebP smaller than PNG?+
Usually. In our test on a flat icon, lossless WebP was about a third smaller than the PNG with every pixel identical.