Convert PNG to WEBP (Modern Web Format)

Convert PNG images to WEBP format for significantly smaller file sizes with similar visual quality. Ideal for web performance optimisation.

✔ What it does

Converts PNG images to WEBP format, typically achieving 25–35% smaller file sizes while maintaining comparable visual quality. Transparency is preserved.

✘ What it does not do

Does NOT support all platforms — older software, some email clients, and legacy systems may not display WEBP correctly.

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How PNG → WEBP conversion works

WEBP is a modern image format developed by Google, based on VP8 video compression technology. It achieves significantly smaller file sizes than PNG at comparable visual quality using both lossless and lossy modes. For lossless WEBP, pixel data is preserved exactly at a smaller file size than PNG. For lossy WEBP, compression is applied at a configurable quality level. Transparency (alpha channel) is supported natively in WEBP — unlike JPG, the alpha channel from the PNG is preserved in the output. Browser support is excellent across all modern browsers (Chrome, Firefox, Safari 14+, Edge). iOS older than 14 does not support WEBP.

Limitations

Not supported by some older operating systems and legacy software (older Photoshop versions, some Microsoft Office versions).
Some email clients do not render WEBP images inline.
iOS older than version 14 does not support WEBP.
Some third-party apps with image upload may not accept WEBP.

When to use this conversion

Optimising images for web pages and web apps where load speed and bandwidth matter.
Replacing PNG images in modern web projects for significant bandwidth reduction.
Mobile-first apps targeting Android and iOS 14+.

Alternatives to consider

AVIF format for even better compression than WEBP (if target browser support allows).
Export directly from Figma, Sketch, or Photoshop to WEBP if the original source file is available.

Frequently asked questions

Is WEBP supported everywhere?

In all modern browsers yes, but check compatibility for email clients and legacy desktop software before switching.

Does it preserve transparency?

Yes. WEBP supports alpha channel natively — transparency from the PNG is fully preserved in the WEBP output.

How much smaller will the file be?

Typically 25–35% smaller than an equivalent PNG. Results vary by image content — photographs compress more than graphics.