Batch Image Compressor: compress image online free

How batch image compression works

This tool lets you upload multiple images at once, define the compression level, and process all files locally in your browser.

Before compression, each file shows an estimated output size so you can choose a lighter or stronger setting with fewer retries.

Control output size and quality in one workflow

You can keep the original format or convert to JPEG/WEBP for better size reduction, depending on your publishing needs.

Each file displays original and compressed preview, final size, and reduction percentage to speed up approval before download.

• Light compression for better visual fidelity.
• Medium compression for size and quality balance.
• Strong compression for smaller uploads.
• Batch processing for many images in one run.

Privacy and practical limits

Image processing runs locally by default, without automatic upload to a server.

Very large images can take longer depending on available memory and CPU, especially on mobile devices.