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Compress WebP images online

Optimize WebP files for even faster load times. Free, private, browser-based.

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Compress WebP Online — Free, Fast & Private

WebP is already an efficient format, but further compression can squeeze out significant additional savings. MiniPx re-encodes your WebP files at your chosen quality level, often reducing size by another 20-40% beyond what the original encoder achieved. This is especially valuable for web developers optimising Core Web Vitals scores.

This additional compression is most effective when you have WebP files exported at high quality (90%+) from tools like Photoshop, Figma, or other design software. Re-encoding at quality 78% (Smart preset) produces no perceptible visual difference while shaving 20-40% off file size.

For websites with hundreds of WebP images, this optimisation compounds dramatically. If your average WebP file drops from 200KB to 130KB, a page loading 15 images saves over 1MB — a noticeable improvement in loading time, especially on mobile networks.

MiniPx processes everything in your browser. Your WebP files are never uploaded to any server, making it safe for proprietary website assets and confidential images.

How it works

  1. Upload WebP files: Drag your WebP files into MiniPx. No file count or size limits.
  2. Set quality preset: Smart gives balanced compression. Tiny for maximum reduction. Gentle for minimum quality loss.
  3. Compress: Click the Compress button. Processing happens instantly in your browser.
  4. Download optimized files: Save optimized WebP files individually or as a ZIP.

Frequently asked questions

Can WebP files be compressed further?
Yes. WebP files exported at high quality (90%+) can typically be reduced by 20-40% with no visible quality loss by re-encoding at quality 78% (Smart preset). Files already at low quality will see smaller gains.
Is WebP better than JPEG for websites?
Yes. WebP produces 25-35% smaller files than JPEG at equivalent quality, supports transparency and animation, and is recommended by Google for web performance. All modern browsers support WebP.
Does compressing WebP affect transparency?
No. MiniPx preserves the alpha channel (transparency) when compressing WebP files. Transparent areas remain transparent in the compressed output.
Can I batch compress WebP files?
Yes. Add as many WebP files as you want and compress them all at once. Download all optimised files as a ZIP. No file count limits or daily caps.
Does MiniPx support animated WebP?
Currently MiniPx handles static WebP images. Animated WebP support is planned for a future update.
What quality setting should I use for WebP?
Smart (quality 78%) for most web images — visually identical to the original at 20-40% smaller size. Gentle (82%) when maximum quality matters. Tiny for images where file size is more important than visual fidelity.

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