Compress JPEG Online

Reduce JPEG file size for websites, email attachments, online stores and social media. LessMB compresses JPEG images locally in your browser, so your photos stay private.

Files stay on your device
How it works

Compress JPEG Online for private browser workflows

Compress JPEG files without uploading

Select a JPEG file and adjust the quality slider to balance file size and visual clarity. LessMB processes the image entirely in your browser — no server upload needed.

Choose your output format

Keep JPEG for broad compatibility, or convert to WebP or AVIF for modern websites where smaller file sizes matter. PNG is available when you need lossless output.

Resize while compressing

Adjust image dimensions by pixels or percentage alongside quality settings. This is useful when both the resolution and file size need to meet upload requirements.

Common use cases

Shrink JPEG photos before uploading to CMS platforms, blogs and e-commerce product pages.

Web publishing

Reduce JPEG size to meet attachment limits in Outlook, Gmail and other email providers.

Email attachments

Prepare photos for profile pictures, cover images and post media without installing editing software.

Social media

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FAQ

Compress JPEG Online FAQ

Answers for the most common questions about this tool, supported workflows, and local browser processing.

No uploadFree toolBrowser-based
Can I compress JPEG files for free?

Yes. LessMB compresses JPEG files for free directly in your browser without requiring an account.

Does compressing JPEG reduce quality?

JPEG uses lossy compression. Lower quality settings produce smaller files but may introduce visible artifacts. Start with 80% quality for a good balance.

What is the best format instead of JPEG?

WebP and AVIF often produce smaller files at similar quality. Use JPEG when you need the widest compatibility across devices and platforms.