Does compression reduce image quality?

At high quality settings (80–95%), compression is barely noticeable. Lower settings reduce file size more but may introduce artifacts. PNG compression is lossless.

What is the best quality setting?

For web use, 80–85% quality gives a great balance. For printing, use 90%+. PNG output is always lossless.

Can I compress multiple images at once?

Yes — select multiple files at once using the file picker. Each image is compressed and can be downloaded individually.

Why is PNG compression less effective?

PNG uses lossless compression, so the output quality is always perfect but file size savings are smaller. Convert to JPG or WebP for larger size reductions.

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Image Compressor

Compress PNG, JPG and WebP images and reduce file size. Adjust quality, compare before/after. 100% in-browser — nothing uploaded.

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Click to upload images or drag & drop here

PNG · JPG · WebP · Multiple files supported

About Image Compressor

Reduce image file sizes for faster websites, smaller email attachments, and easy sharing — without leaving your browser.

Features

Compress multiple images at once
Adjustable quality slider (10%–100%)
Output as JPG, PNG, WebP, or Auto
See exact size savings per image
Download all with one click
100% private — no server upload

Tips

80–85% quality is ideal for web images
90%+ for photos you'll print
WebP gives the best size/quality ratio
PNG compression is always lossless