PNG to WebP Online Converter

Drag & drop images here, or click to browse

Batch conversion on your device — images are never uploaded.

Description

100% in-browser Canvas conversion
Smaller file size while keeping transparency

Related Tools

PNG to WebP Converter – Free, Keeps Transparency

Convert PNG images to WebP directly in your browser and keep the alpha channel. A batch of logos, stickers or UI graphics is decoded and re-encoded on your own machine, so nothing is uploaded and there is no software to install.

WebP is built for the modern web: it stores transparency like PNG but compresses far tighter, which is why sites swap heavy PNG assets for it. For the trade-offs in plain terms, see WebP vs JPG vs PNG.

Key features

Turn PNG logos, stickers and graphics into smaller WebP files, in batch
Alpha transparency survives the conversion - backgrounds stay see-through
Runs as local canvas processing; files never traverse the network
Original resolution is preserved with no resizing control to mis-set
Free with no account required, no waiting queue and no watermark

How to use

Drag PNG files onto the page, or click the drop zone to browse for them.
The browser encodes each one to WebP automatically and shows the new size.
Download files individually, or take the whole batch as a ZIP archive.

Where WebP came from and what it is built on

Google announced WebP in September 2010 as a new web image format. Its lossy encoder was derived from the intra-frame coding of the VP8 video codec, and a lossless mode followed later, built on a dedicated compression scheme called VP8L. In both modes WebP supports an alpha channel, which plain JPEG cannot offer.

Google published comparisons, repeated by browser vendors, showing that at equivalent visual quality lossy WebP images come out about 25 to 35 percent smaller than JPEG, and lossless WebP graphics are meaningfully smaller than equivalent PNGs. Support now covers Chrome, Edge, Firefox and Opera; Safari added WebP in version 14 (2020). On genuinely old browsers a JPEG or PNG fallback may still be worth serving.

PNG vs WebP: the case for switching

The two formats are the only common ones that carry true transparency, so the comparison is really about compression efficiency rather than capability.

Size: transparent logos, badges and stickers often shrink by 30 to 70 percent moving from PNG to WebP, with the transparent pixels fully intact.
Transparency: 8-bit alpha is preserved, so a WebP logo composited over a coloured page looks exactly like the PNG did.
Compatibility: WebP is native on all current desktop and mobile browsers. If your audience uses older Safari versions or embedded in-app web views, keep a PNG or JPG fallback alongside.
Editing: most modern design tools open WebP, but if your workflow still relies on an old editor that cannot, keep the master as PNG and ship the WebP to the browser.

How the browser produces the WebP file

Nothing about the output is adjustable on purpose. Each PNG is loaded into an offscreen canvas at its native pixel size, and the canvas is then exported as WebP using the browser built-in encoder - the same engine that powers WebP support in Chromium-based browsers.

Because the target type is WebP rather than JPEG, no white background is painted first; the alpha channel is carried through unchanged.
The encoder applies the browser standard WebP compression; there is no quality slider on this dedicated page, and the pixel dimensions never change.
Batch input is accepted, and more than one file unlocks the combined ZIP download.
Support note: WebP export relies on the current browser. In an ancient browser where canvas WebP encoding is unavailable, the page cannot produce the file - a modern Chrome, Edge, Firefox or Safari is required.

When to choose WebP over PNG

Convert to WebP when...

the images are destined for a website, app or CDN where smaller bytes matter;
transparent logos, icons or decorative graphics must keep their alpha over the page;
you are optimizing page load time alongside other image compression steps.

Keep PNG when...

an old client, printer, CMS or legacy tool cannot open WebP;
you need a lossless master that every piece of software ever made can read;
the recipient explicitly asked for a .png attachment.

Step by step: preparing transparent assets for a site

For the opposite direction - serving WebP to modern browsers and PNG to older ones - the format guide linked below lays out the fallback logic.

Collect the transparent PNGs - logos, badges, product cutouts.
Drop them onto the zone together; order does not matter for independent files.
Wait for local encoding; each WebP reports its size, usually far below the PNG.
Download the batch ZIP and deploy the WebPs alongside your site assets.
If you also have photographic JPGs to slim down, the image compressor handles those in the browser too.

Frequently Asked Questions

Does PNG to WebP keep transparency?

Yes. Unlike JPEG, WebP stores an alpha channel, and this converter does not flatten the image onto a background. Transparent pixels stay transparent, so the result composites cleanly over any coloured page.

How much smaller is WebP than PNG?

It varies with the image, but transparent graphics commonly shrink by a third to two thirds. Google published tests putting lossless WebP roughly a quarter smaller than equivalent PNGs on average, and photographic lossy WebP about 25 to 35 percent below JPEG.

Will old browsers still display my WebP?

Current Chrome, Edge, Firefox and Safari 14+ do. Very old Safari versions and some embedded web views do not; for those, keep a PNG or JPG fallback next to the WebP.

Is the conversion lossless?

This page exports WebP through the browser canvas encoder. It preserves pixels and alpha, but the exact compression behaviour is the browser own; for a guaranteed master, keep the original PNG and treat the WebP as the web-ready copy.

Are my images uploaded during conversion?

No. The whole process runs in your browser tab with the canvas API; the PNG files never leave your device and no server sees them.

Can I convert a whole folder at once?

Yes. Select multiple PNGs or drag a group onto the drop zone. Each one is encoded separately, and a batch of more than one downloads as a single ZIP.

Why not just use the [PNG to JPG](/convert/png-to-jpg/) page?

Because JPEG has no transparency. If your graphic must stay see-through, JPG would paint white around it. WebP is the right target when you need both small size and alpha.