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PNG to WebP Converter

Convert PNG to WebP free, instantly, and entirely in your browser — smaller files, faster pages, no uploads, no signup.

Drop your PNG image here or click to upload

Why convert PNG to WebP?

Converting PNG to WebP is one of the simplest ways to shrink your page weight without changing how anything looks. Google's own published comparisons show that WebP files typically come in roughly 25-35% smaller than equivalent PNGs at visually lossless quality, and crucially, WebP supports the same full alpha-channel transparency as PNG. That means you don't lose anything switching over — your logos, icons, and UI graphics keep their transparent backgrounds while the file itself gets lighter.

This matters more than it might seem because of how Google evaluates page speed. Lighthouse's "Serve images in next-gen formats" audit specifically flags PNG images and recommends converting them to WebP or AVIF. Smaller image payloads load faster, and that directly improves Largest Contentful Paint (LCP), which is a real Core Web Vitals metric that factors into Google's ranking signals and shows up in PageSpeed Insights reports.

Where this helps most

Logos, icons, and UI graphics with transparency are exactly the kind of images that tend to be saved as PNGs in the first place, so they're also the images with the most to gain from converting. Shrinking these files is often the fastest single fix for a low PageSpeed Insights score.

How to convert PNG to WebP

  1. Drop your .png file into the upload box above, or click to browse.
  2. Confirm WebP is selected as the output format (it's pre-selected for you).
  3. Adjust the quality slider — 85% is a good default that keeps transparency intact.
  4. Click Convert, then download your new .webp file.

Frequently asked questions

Does WebP support transparency like PNG?

Yes. WebP supports the same full alpha-channel transparency as PNG, so logos, icons, and UI graphics keep their transparent backgrounds with no quality tradeoff when you switch formats.

How much smaller will my file be?

Typically 25-35% smaller at comparable visual quality, according to Google's published WebP research. Actual savings vary by image content, with graphics, logos, and screenshots often seeing the biggest reductions.

Will converting to WebP hurt my Core Web Vitals score, or help it?

It helps. Smaller image payloads reduce the time it takes your largest visible element to render, which directly improves Largest Contentful Paint (LCP), one of Google's Core Web Vitals.

Is there a file size limit?

The converter handles images up to 10000x10000 pixels. This cap exists because conversion happens in your browser's memory rather than on a server — see our Privacy Policy for details.