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Convert JPG to WebP

Convert JPG and PNG to WebP for faster websites, with a quality slider.

How it works

WebP is supported by every current browser and by most CMS platforms, and it produces files 25-35% smaller than JPG at equal quality. Smaller images mean faster Largest Contentful Paint, which matters for both users and search ranking. Converting your existing JPG and PNG assets is the quickest win.

This tool uses the browser's own WebP encoder. PNG sources keep their transparency, since WebP supports an alpha channel. Metadata is not carried over, which is normally what you want for web assets.

Choosing the WebP quality

UseQualityWhy
Hero images and product photos80 to 85Indistinguishable from the JPG at normal size, and noticeably smaller
Thumbnails and gallery grids70 to 75Shown small, so artefacts are invisible
Screenshots with text90 or higherKeeps letter edges clean
Images with transparency (from PNG)80 to 90The alpha channel is kept

Honest limits: the quality slider trades size against fidelity, so lower values are lossy; EXIF metadata (camera, location) is not copied, which is usually what you want on the web; and only still images are converted. For an exact byte limit, the image compressor can target a size with WebP output too.

Before replacing images on a site, check that your CMS or theme serves WebP (WordPress has supported WebP uploads since version 5.8) and keep the original JPGs as a backup.

How to use it

  1. Drop a JPG or PNG file, or click to browse.
  2. Choose a quality. 80-85% is the usual sweet spot for photos; use 90%+ for images with fine text.
  3. Click Convert.
  4. Download the .webp file and compare the size shown against the original.

Frequently asked questions

Is WebP safe to use on my website?

Yes. Chrome, Firefox, Edge, Safari (since 14) and all major mobile browsers support it. Keep a JPG fallback only if you must support very old browsers.

Does WebP keep transparency from PNG?

Yes. Lossy WebP with alpha is supported and is usually far smaller than the PNG.

Why not AVIF?

AVIF is smaller still, but browser encoders for AVIF are not widely available in the canvas API yet. WebP is the practical choice for in-browser conversion today.

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