Kompressor v1.0

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Compress WebP images online.

WebP is Google's modern image format that delivers 25-35% smaller files than JPEG at equivalent quality. It supports lossy and lossless compression, transparency (alpha channel), and animation — making it a versatile replacement for both JPEG and PNG.

Browser support for WebP has reached over 97% globally, making it a safe choice for production websites. Our compressor uses the libwebp encoder with full control over quality, method, and compression mode.

Key features

  • 25-35% smaller files than JPEG at same quality
  • Lossy and lossless compression modes
  • Full alpha channel transparency support
  • Animation support for animated WebP
  • Adjustable compression method (0-6) for density

How to compress webp — step by step

  1. Drop your image: Drag and drop any image format onto the upload area — JPEG, PNG, WebP, or AVIF are all accepted.
  2. Configure WebP settings: Adjust quality (1-100), choose lossy or lossless mode, and set the compression method (0-6) for optimal density.
  3. Preview the result: Use the side-by-side comparison slider to verify quality, especially around edges and gradients.
  4. Download your WebP: Save individual WebP files or download all as a ZIP. Your originals never leave your device.

Common use cases

Whether you are a photographer, web developer, e-commerce manager, or social media creator, optimizing images before publishing saves bandwidth, improves page load times, and ensures compatibility with platform-specific requirements. Our browser-based compressor works with all major image formats and processes everything locally for your browser with no uploads.

Need to convert images between formats? Try our Image Converter. To resize images for any platform, use the Image Resizer. For rotation and flipping, check the Image Rotator. To crop images with preset aspect ratios, use the Image Cropper.

Compress WebP

Frequently Asked Questions

  • Is WebP better than JPEG?

    WebP typically produces files 25-35% smaller than JPEG at the same quality level, with fewer artefacts in gradient areas. It also supports transparency and animation — features JPEG cannot offer.

  • Does WebP support transparency?

    Yes. WebP has full alpha channel support, similar to PNG. Our compressor preserves transparency while independently optimizing the colour and alpha planes for maximum compression.

  • What is the difference between lossy and lossless WebP?

    Lossy WebP uses block-based predictive coding similar to VP8 video compression. Lossless WebP uses spatial prediction and colour cache for excellent compression without any quality loss.

  • Can I convert JPEG to WebP?

    Yes. Drop a JPEG and set the output format to WebP. The compressor re-encodes from the source into WebP, typically saving an additional 25-35% compared to the original JPEG.

  • Is WebP supported by all browsers?

    WebP is supported by Chrome, Firefox, Safari (14+), Edge, and Opera — over 97% of global browser usage. For the remaining 3%, serve a JPEG fallback.