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EVOA Toolbox

JPG to WebP Converter

Convert JPG and JPEG photos to WebP in your browser, with adjustable quality and a before/after preview. Nothing is uploaded.

Processed locally in your browser. Your files are not uploaded.

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What this tool does

WebP is a modern image format that, for photos, often reaches the same visual quality as JPEG at a smaller file size. Converting a website's JPEGs to WebP is one of the simplest ways to cut page weight. This tool converts one image or a whole batch and shows the real before and after size, so you can judge the benefit on your own pictures.

WebP is not always smaller. At high quality, or for images that were already compressed hard, the gain can be small, and a WebP of a noisy photo can even come out larger. Use the quality slider and the comparison view to find a setting where the difference is invisible and the size is lower. WebP supports transparency, but JPEG does not, so there is nothing to lose when converting from JPG.

The conversion runs in your browser: the JPEG is decoded, EXIF rotation is applied, and the pixels are encoded as WebP by your browser's own encoder. Because this is a re-encode, it is a second lossy generation, so keep your original JPEGs. Camera metadata such as GPS location is not carried over.

How to use it

  1. 1Add one or more JPG or JPEG files.
  2. 2Set the quality. Around 80 is a balanced start for photos.
  3. 3Press Convert to WebP.
  4. 4Use the before/after slider on a result to check detail in skies, skin and text.
  5. 5Download each file, or all of them as a ZIP.

Supported formats

Input: JPG and JPEG. Output: WebP (lossy). Your browser must be able to encode WebP; the tool tells you if it cannot.

Privacy

This tool runs in your browser. The data you provide is processed on your device and is not sent to our servers.

Limitations

  • The result is not guaranteed to be smaller than the JPEG, especially at high quality settings or for images that are already heavily compressed.
  • This is lossy to lossy conversion, so repeated conversions accumulate artefacts.
  • Browsers' WebP encoders differ. Some older Safari versions cannot encode WebP in a canvas; in that case the tool is disabled instead of saving a different format under a .webp name.
  • Metadata (EXIF, GPS, ICC profile) is not preserved. Very large images (over 100 megapixels) are refused.
  • WebP is widely supported by modern browsers, but older software, some email clients and some print or editing workflows may not open it.

FAQ

Is WebP always smaller than JPG?

No. Typical photos often shrink noticeably at comparable visual quality, but the gain depends on the image and the settings. Check the size shown after conversion; if WebP is not smaller, keep the JPEG.

What quality should I choose for WebP?

WebP quality numbers are not the same scale as JPEG. A value of 75 to 85 is usually a good balance for photos. Compare with the before/after slider and lower it until you see a difference.

Does WebP work everywhere?

All current major browsers display WebP. Older software and some services still reject it, so check where you plan to use the file, or keep a JPEG copy.

Is the conversion private?

Yes. It is processed locally in your browser and the images are not uploaded.

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