FREE ONLINE TOOL

Image Compressor

Compress JPG, PNG or WebP photos locally.

Jump to tool ↓
Drop files hereor select files to process locally in your browserChoose files

Loading tool…

REAL-WORLD EXAMPLE

Try a real image compression

Try: Select a JPG, PNG or WebP image, lower output quality to 75%, then select Process image.

Expected behavior: Compare original and final byte sizes and inspect the preview before downloading.

Results vary with photo complexity; PNG is lossless and may be larger.

NEXT ACTION

Keep working with another tool

Finished this task? Open a useful follow-on tool in one click.

Image Format Converter →Image Resizer →Combine JPG & PNG Images into One PDF →All tools →

About the Image Compressor

Reduce picture file sizes for websites, presentations and attachments in your browser.

Formula or method

A canvas encodes a new image as WebP, JPEG or PNG. Lower quality settings often make WebP and JPEG files smaller.

Worked example

Load a 3 MB photo, choose WebP quality 75%, process and download the result.

How to use the tool

  1. Choose up to 20 supported images or start with the sample image.
  2. Select the output format and quality; for photographs, compare WebP and JPEG results visually.
  3. Process the files, review before/after previews and bytes saved, then download individually or as ZIP.

When this tool is useful

Create smaller JPEG, PNG or WebP image files while checking visible quality.

What to check before relying on the result

PNG encoding may not reduce file size, animation is not supported and EXIF metadata is removed. JPEG removes transparency.

Assumptions and limitations

Results depend on image content and codec. PNG is lossless and may not shrink. Metadata and EXIF are not preserved.

Frequently asked questions

Can compression reduce image quality?

Yes. JPEG and WebP use lossy compression when lowering quality. Check the preview before downloading.

Why is my image larger after compression?

A small or already-optimized image can grow when re-encoded. Compare output size and try a different format or quality.

Continue with a related workflow

Privacy and support

Your inputs are processed locally in your browser. ToolMosaic does not upload or store the values you enter in this tool. Our tools are free, and we appreciate your support.