Image Compression Tool - Reduce Image File Size Online

Simply adjust the quality slider to effectively reduce image file size. Compare file sizes before and after compression in real time. All processing happens in your browser, so your images are never sent to a server.

Drag & drop file here

or click to select

PNG, JPG, GIF, WebP, BMP

What is Image Compress?

Image compression is the process of reducing the file size of an image. By lowering quality parameters in JPEG format or using efficient algorithms in WebP format, file size can be significantly reduced with minimal quality loss. It is widely used for improving website loading speed, saving storage space, and meeting email attachment size limits.

How to Use

  1. Select the output format (JPEG or WebP) and adjust quality with the slider
  2. Drag and drop files onto the drop area, or click to select multiple files
  3. Processing starts automatically, and completed files are downloaded one by one

FAQ

Will compression degrade quality?
Setting quality to 70-80% can significantly reduce file size with virtually no visible difference. Lowering quality too much may cause block artifacts.
Can PNG images be compressed?
PNG uses lossless compression and doesn't support quality-based compression. For file size reduction, consider converting to JPEG or WebP format.
Are images sent to a server?
No, all processing happens entirely in your browser.
What image formats are supported?
JPEG, PNG, and WebP formats are supported. Note that PNG uses lossless compression, so the quality slider has limited effect on PNG files.
What should I do if compression fails?
Compression may fail for unsupported formats. For PNG files, consider using an image conversion tool to convert to JPEG or WebP first.

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Update History

Last Updated: 2026-02-24

  • 2026-02-24 Added support for batch compression of multiple files.
  • 2026-02-21 Initial release