LessMB is a free, browser-based tool that compresses images, videos, and PDFs directly on your device without uploading them to any server.
What is LessMB?
LessMB is a privacy-focused online file compression tool that processes files entirely in your browser. It takes image, video, and PDF files as input and outputs compressed versions of the same format, reducing file size for easier sharing and storage. The tool runs on any modern web browser without installation or account creation. LessMB is developed by an independent team focused on local-first utilities.
Key Features
- Local processing – Files are compressed in your browser session; no data leaves your device.
- Multiple format support – Compress JPG, PNG, GIF, WebP, AVIF, and JXL images; MP4, MOV, and WebM videos; and PDF documents.
- No sign-up required – Fully free to use with no account or email needed.
- Multilingual interface – Available in English, Spanish, Portuguese, German, French, Japanese, and Chinese.
- Instant download – After compression, the smaller file is available for download immediately with no waiting.
- Privacy by design – Since everything runs client-side, sensitive files stay private.
Who is it for?
- Web developers and designers – Optimize JPG, PNG, and WebP images to improve page load times without losing visible quality.
- Content creators and social media managers – Compress video clips and GIFs to meet platform upload limits (e.g., Twitter's 512MB for video).
- Office workers and students – Reduce PDF file sizes to fit email attachment limits or school portal upload requirements.
- Privacy-conscious users – Anyone who needs to shrink files but does not want them processed on external servers.
What can you do with LessMB?
- Reduce image sizes for websites: Compress product photos, blog images, and design assets to under 100KB for faster loading.
- Compress videos for sharing: Shrink screen recordings, short clips, and presentation media to under the upload limits of messaging apps like WhatsApp (16MB) or email.
- Shrink PDFs for email: Reduce scanned contracts, forms, and reports to stay under typical 10-25MB email attachment caps.
How does LessMB work?
- Upload – Select an image, video, or PDF file from your device using the file picker.
- Compress locally – The file is processed entirely in your browser using client-side algorithms; no data is sent to a server.
- Download – Once compression finishes, the reduced file is ready to download immediately.
