Does WEBP keep the transparency from my PNG?

Yes. WEBP supports a full alpha channel, exactly like PNG. When you convert a transparent PNG to WEBP with this tool, the transparency is preserved precisely, pixel for pixel.

How much smaller will the WEBP be?

In lossy mode at quality 85, expect 50 to 70 percent reduction on most PNG graphics. In lossless mode (quality 100), expect 20 to 30 percent reduction. Simple graphics with flat colors benefit the most. Photos already compressed in PNG benefit a bit less.

Is there a quality difference at 85?

For photographs and complex illustrations, the difference between a lossless PNG and a WEBP at quality 85 is almost impossible to spot without pixel-peeping tools. For very sharp text at small sizes, you may want quality 95 or higher to avoid slight edge softness.

Does WEBP work in all browsers?

Yes, in all modern browsers. Chrome (2010), Firefox (2019), Safari (2020), and Edge (2018) all support WEBP natively for viewing and encoding. IE11 and very old Android versions are the only exceptions and are effectively irrelevant today.

Will FileShrink upload my file?

No. The conversion is done entirely in your browser through the HTML5 Canvas API. Your PNG is read locally, re-encoded locally, and the WEBP is produced locally. No file is sent to any server at any step.

Convert PNG to WEBP — keep transparency, cut the size

Drop a PNG below and get a WEBP typically 25 to 70 percent smaller, with transparency preserved. Entirely in-browser, nothing uploaded.

Drop your files here

or click to browse — one file or several

Your file is processed entirely in your browser. Nothing is uploaded.

PNG is unbeatable for preserving image detail pixel by pixel, but it pays for that precision with large file sizes. On the modern web, those large PNGs hurt Core Web Vitals, slow down page loads, and eat your visitors’ mobile data. WEBP is the modern alternative: it offers both lossy and lossless modes, supports a full alpha channel so your transparent backgrounds are preserved, and in most cases produces files dramatically smaller than the equivalent PNG — often 25 to 35 percent smaller in lossless mode, and up to 70 percent smaller in lossy mode at imperceptible quality loss.

This converter takes your PNG and re-encodes it as a WEBP directly in your browser, using the HTML5 Canvas API and the built-in WEBP encoder available in Chrome, Firefox, Safari, and Edge. Your image stays on your device — nothing is uploaded. Drop a PNG, choose a quality, and download the result. If you ship images on a website, this is one of the fastest wins for page speed you can get.

How to convert PNG to WEBP in 4 steps

1

Drop your PNG file

Drag the file onto the dropzone or click to open the file picker. Transparency in the PNG will be preserved in the output.
2

Pick a WEBP quality level

85 is the sweet spot for most content. 100 produces near-lossless output. 70 is aggressive but still visually acceptable for many use cases.
3

Let the Canvas API re-encode

The encoder runs locally in your browser. Most images finish in under a second.
4

Check and download

The result panel shows the size comparison. Click download to save your new WEBP.

PNG vs WEBP: same quality, much smaller

PNG uses a lossless compression algorithm called DEFLATE with filters, which was excellent when PNG was standardized in the 1990s but cannot compete with modern image codecs on compression ratio. WEBP offers two modes: lossy WEBP uses a compression scheme derived from VP8 video coding, while lossless WEBP uses a more advanced algorithm than PNG’s DEFLATE. On typical graphics with transparency — UI screenshots, product mockups, illustrations — lossless WEBP is about 25 to 30 percent smaller than the equivalent PNG. If you can accept lossy compression, the savings jump to 50 to 70 percent with no visible difference. Both formats support full transparency through an alpha channel. Browser support for WEBP is universal among modern browsers since 2020.

When should you convert PNG to WEBP?

Improving Largest Contentful Paint

Switching hero PNGs to WEBP can shave 500ms or more off LCP on mobile connections. One of the cheapest wins in web performance optimization.

Shrinking a design asset library

A team with thousands of PNG mockups can reduce their total folder weight 30 to 70 percent without any change in workflow or visual quality.

Delivering PWA icons and UI assets

WEBP is smaller than PNG at equivalent quality, and alpha transparency works exactly the same, making it ideal for app UI graphics.

Sending mockups by email

Smaller WEBPs travel faster through email gateways and rarely get rejected by attachment size limits.

Frequently asked questions

Does WEBP keep the transparency from my PNG?: Yes. WEBP supports a full alpha channel, exactly like PNG. When you convert a transparent PNG to WEBP with this tool, the transparency is preserved precisely, pixel for pixel.
How much smaller will the WEBP be?: In lossy mode at quality 85, expect 50 to 70 percent reduction on most PNG graphics. In lossless mode (quality 100), expect 20 to 30 percent reduction. Simple graphics with flat colors benefit the most. Photos already compressed in PNG benefit a bit less.
Is there a quality difference at 85?: For photographs and complex illustrations, the difference between a lossless PNG and a WEBP at quality 85 is almost impossible to spot without pixel-peeping tools. For very sharp text at small sizes, you may want quality 95 or higher to avoid slight edge softness.
Does WEBP work in all browsers?: Yes, in all modern browsers. Chrome (2010), Firefox (2019), Safari (2020), and Edge (2018) all support WEBP natively for viewing and encoding. IE11 and very old Android versions are the only exceptions and are effectively irrelevant today.
Will FileShrink upload my file?: No. The conversion is done entirely in your browser through the HTML5 Canvas API. Your PNG is read locally, re-encoded locally, and the WEBP is produced locally. No file is sent to any server at any step.

Related conversions

JPG → WEBP SVG → WEBP GIF → WEBP BMP → WEBP