Comparison1 min readUpdated July 1, 2026

JPG vs WebP: which should you use?

Short answer

Use WebP for the web: it is typically 25-35% smaller than JPG at the same quality and supports transparency. Use JPG when you need maximum compatibility with old software, email clients, or printers.

The core difference

Both are lossy photo formats, but WebP uses newer compression than JPG and reaches a smaller file at the same visible quality. WebP also supports transparency and animation, which JPG cannot do. The trade-off is compatibility: JPG opens everywhere, while a few older tools still choke on WebP.

Same photo, relative file size (illustrative)

WebP~0.7x

JPG~1x

Illustrative: WebP is commonly 25-35% smaller than JPG at matching quality. Actual savings depend on the image.

When to use WebP

Images on a website or web app, where page weight matters
Photos that need a transparent background (JPG cannot)
Anywhere you control the viewer and know it supports WebP

When to stay on JPG

Maximum compatibility with old apps, email clients, and printers
Sharing with people who may open the file in legacy software
Workflows that require JPG, such as some photo-print services

WebP vs AVIFAVIF compresses even better than WebP but has less support and is slower to encode. For most sites WebP is the pragmatic default. See WebP vs AVIF.

Try it: Image ConverterConvert between JPG, WebP, PNG, and AVIF locally — the file stays in your browser.Open tool

References

Questions

Is WebP better than JPG?

For the web, usually yes: WebP is smaller at the same quality and supports transparency. JPG remains better only when you need to open the file in older or specialized software that lacks WebP support.

Does converting JPG to WebP improve quality?

No conversion adds detail. Converting a JPG to WebP mainly reduces file size; it cannot recover detail the JPG already discarded. Convert from the highest-quality source you have.

Do these tools upload my images?

No. Utilumo's image tools decode, edit, and export pictures inside the browser tab. The files are never uploaded or stored on a server.

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