Private image compression

Free Online Image Compressor

Reduce image file size for websites, email, stores, newsletters and forms. LessMB compresses supported image files on your device, so private photos and design assets do not need to leave your browser.

image compressorcompress imagereduce image sizeJPG compressorPNG compressorWebP compressor
TypeAdd fileAdjustDownload

Drag your image here or click to compress

Compress JPG, PNG, GIF, WebP, AVIF, and JXL images in your browser.

How it works

Free Online Image Compressor for private browser workflows

Compress JPG, PNG, GIF, WebP, AVIF and JXL

Use one browser tool for common image formats. Choose automatic output or select JPG, PNG, WebP, AVIF, JXL or GIF depending on compatibility and size goals.

Control quality and dimensions

Adjust image quality and resize by pixels or percentage before downloading the optimized result. This helps prepare assets for product pages, blog posts and upload limits.

Local processing for private files

Your source image is opened by the current browser session and processed locally. LessMB does not require account login, cloud queues or remote storage.

Common use cases

Shrink large images before publishing pages, landing pages and product media.

Website owners

Prepare thumbnails, social graphics and portfolio images without installing desktop software.

Creators

Reduce screenshots and design previews before sending them through email or shared workspaces.

Teams

Related guides

Square image resizing

Resize Image to 512x512 Online

Many avatars, icons, thumbnails and upload forms ask for a 512x512 image. LessMB lets you resize and compress supported images locally in your browser.

Open guide
GIMP image resizing

How to Resize an Image in GIMP

GIMP is powerful for detailed edits, but it can be more than you need for simple resizing. Use GIMP when you need manual editing, or use LessMB when you just need a quick browser resize and compression pass.

Open guide
Windows image resizing

How to Resize Image in Paint

Microsoft Paint can resize images quickly on Windows. If you want browser-based resizing plus compression, LessMB gives you another simple option without opening desktop editing software.

Open guide
FAQ

Free Online Image Compressor FAQ

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

No uploadFree toolBrowser-based
Is LessMB a free online image compressor?

Yes. LessMB compresses supported image files for free in a modern browser without requiring an account or desktop installation.

Are my images uploaded to a server?

No. Image compression runs locally in your browser session, which helps keep source files on your device.

Which image format should I choose?

WebP and AVIF are strong choices for modern websites, JPG is useful for broad photo compatibility, and PNG is best when transparency matters.

Featured on ufind.best