HIFreeTools
ENES

Free PNG to WebP Converter

Shrink PNG files by converting them to modern WebP, which keeps transparency while producing a much smaller file. Convert in batches, all in your browser.

Drop images here, or browse

Convert one or many at once to WEBP · processed in your browser, never uploaded

Higher = better quality and larger file. 80–92% suits most photos.

Runs entirely in your browser — your images are never uploaded to a server.

Quick answer

To convert PNG to WebP, re-encode the image in Google's WebP format, which is typically 25–35% smaller than PNG or JPG at similar quality and still supports transparency. This tool does it in your browser: drop in PNGs, pick a quality, and download lighter WebP files ready for the web.

Formula & method

The tool decodes each PNG, draws it onto an HTML canvas keeping the alpha channel, and exports WebP at your chosen quality. WebP combines efficient lossy compression with transparency support, so a transparent PNG logo becomes a far smaller file that still drops cleanly onto any background — ideal for fast-loading web pages.

Examples

Example 1: Speed up a page
Input
640 KB PNG → WebP 80%
Result
≈ 180 KB
Why
WebP cuts most of a PNG's weight, improving load time and Core Web Vitals.
Example 2: Keep transparency
Input
Transparent PNG logo → WebP
Result
Smaller, still transparent
Why
Unlike JPG, WebP preserves the alpha channel, so the logo stays see-through.
Example 3: Whole image folder
Input
20 PNG assets at once
Result
20 WebP files
Why
Batch-convert a site's image assets in one pass for deployment.

When to use this tool

  • Reducing page weight while keeping transparent logos and icons crisp.
  • Preparing modern, fast-loading image assets for a website.
  • Shrinking large PNG exports for sharing without losing the alpha channel.

Common mistakes

  • Using WebP for images that must open in very old software — confirm your audience's tools support it first.
  • Setting quality to 100% and expecting big savings; the largest gains come around 75–85%.
  • Converting a flat-color icon that's already tiny as PNG, where the savings are negligible.

Frequently asked questions

Does WebP keep the PNG's transparency?

Yes. WebP supports an alpha channel, so transparent areas in your PNG carry over — one of the main reasons to choose WebP over JPG for logos and icons.

How much smaller will the WebP be?

It depends on the image, but WebP is commonly 25–35% smaller than PNG or JPG at comparable quality, and often much smaller for photographic PNGs.

Are my PNG files uploaded?

No. Conversion happens entirely in your browser on an HTML canvas, so your images never leave your device.

Will every browser show WebP?

All current major browsers support WebP. Only very old browsers and some legacy desktop software don't — keep a PNG or JPG copy if you must support those.

Can I convert many PNGs at once?

Yes. Drop in or select multiple PNGs and they are all converted to WebP together, each with its own download.

What quality should I use?

75–85% gives a strong size reduction with no obvious loss for most images. Use higher quality for graphics with sharp edges or fine text.

Sources & references

External references open in a new tab. We are independent and not affiliated with these organizations.

  • ✓ Free to use
  • ✓ No sign-up required
  • ✓ Runs entirely in your browser — nothing is uploaded.
  • ✓ Formula and method shown above
Last updated: How we calculateReport a correctionDisclaimer

Provided “as is” for general information only — results may be inaccurate, so verify before you rely on them. No warranty; use at your own risk.

Built and reviewed by HIFreeTools against the formula shown above and any authoritative references cited on this page. See our methodology and editorial standards.

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