Tiny Tiny Tools

Local browser image processing

JPG to WebP Converter

Convert JPG images to WebP for free, usually the smallest option for the web. Fast, private, and processed entirely in your browser.

No files selected

Your files will be listed here once you add them.

WebP quality

Processed locally in your browserYour files never leave this device. No uploads. No registration.

Understand the output

What This Tool Produces

  • A .webp delivery file
  • Unchanged decoded dimensions
  • Measured size change
  • Batch ZIP download

How to Use This Tool

  1. Add JPG photosChoose the website or publishing images to convert.
  2. Set WebP qualityStart near the default and lower it only after checking visible detail.
  3. Compare outputUse the displayed source and output sizes; keep the WebP only when it fits the workflow.

Controls and Method

WebP quality

Lower values usually make a smaller lossy WebP, but there is no guaranteed percentage reduction.

Check the Saving Is Real

WebP usually wins, but not always, and not by a fixed margin. Run the same source through the image compressor and compare the measured output before committing a whole library to one format.

Dimensions still dominate. Resizing to what the page actually displays saves more than any codec choice, and if some recipients reject WebP, converting back to JPG takes seconds.

Why WebP Is Useful for Websites

WebP supports efficient lossy photo encoding and alpha transparency in the format. Smaller delivery files can reduce transfer time, but performance also depends on correct display dimensions, caching, responsive image markup, and server delivery.

Keep the JPG Original

A delivery format should not automatically replace the source. Keep the JPG when partners, editors, or archives need broad compatibility, and publish the WebP where the website pipeline supports it.

No Guaranteed Savings

An already optimized JPG can be smaller than a new high-quality WebP. A noisy photograph can resist compression. Review the measured result rather than relying on a fixed savings claim.

Practical Uses

  • Preparing website hero or article photos
  • Reducing a product-grid transfer budget
  • Creating a modern CMS delivery asset
  • Testing WebP against an existing JPG

Important Limitations

  • The output is not guaranteed to be smaller.
  • Conversion does not change displayed dimensions.
  • No responsive HTML or CDN variants are generated.
  • The browser encoder may differ from a server image pipeline.

Frequently Asked Questions

Will WebP always be smaller than JPG?

No. Content, source compression, dimensions, and the selected quality all influence the result.

Does converting make the page faster automatically?

A smaller file can reduce transfer time, but the site must serve the WebP correctly and use appropriate dimensions, caching, and loading behavior.

Should I delete the JPG?

Usually not. Keep a broadly compatible source or master and use WebP as a delivery copy where supported.

Does JPG become transparent in WebP?

No. The input has no alpha channel, so the output remains opaque.

Does this resize the photo?

No. Use Image Resizer if the delivered pixel dimensions are also larger than needed.