Free Image Compressor

How to Compress Images

Drop your images into the upload area or click to select files. The compressor processes each image in your browser — nothing is uploaded to a server. Adjust the quality slider to find the right balance between file size and visual quality, then download your compressed files individually or as a ZIP.

How Much Can You Compress?

Compression results vary by image type and content:

  • JPEG photos — typically compress 40–70% with virtually no visible quality loss at quality settings of 75–85%. A 3MB phone photo usually gets down to 400–600KB.
  • PNG screenshots — PNG compression works differently (lossless), so savings are more modest — typically 20–40%.
  • WebP — WebP is already an efficient format. This tool can still reduce file sizes 10–30%, and the format is worth using if you’re optimising for web.

Why Image Compression Matters for Web Performance

Page load speed is a direct Google ranking factor. Images are consistently the largest contributor to page weight — a single uncompressed hero image can be larger than an entire well-built web page. The 2024 Chrome UX Report found that images were the LCP (Largest Contentful Paint) element on over 70% of pages.

Compressing images before upload is faster than relying on server-side optimisation and gives you control over the quality/size tradeoff on a per-image basis.

Batch Processing

You can drop multiple images at once and compress them in a single session. Each image gets its own quality slider and before/after file size comparison. Download individual files or grab all compressed images in one ZIP.

Privacy First

This is worth emphasising: image compression tools that work server-side receive your images on their servers and process them there. For screenshots, documents, sensitive product photos, or anything you wouldn’t post publicly, that’s a risk you may not want to take. This tool compresses entirely in JavaScript in your browser tab. Your files never leave your device.

Frequently Asked Questions

What image formats does this compressor support?

JPEG, PNG, and WebP. GIF and AVIF support is not currently included.

Will compression make my images look worse?

At quality settings of 75% and above, most people can’t tell the difference between a compressed and uncompressed image in normal viewing conditions. The before/after preview in the tool lets you compare directly before committing to a download.

What’s a good quality setting to use?

75–85% is a safe range for most web images. Go lower (60–70%) for images where file size matters more than perfect detail — like thumbnails or background images. Stay at 85%+ for product photos where sharpness is important.

Is there a file size limit?

No hard limit. Large files (10MB+) may take a few seconds to process in-browser, but there’s no server-side restriction on file size.

Can I use this tool for free commercially?

Yes. Compressed images you download are yours to use however you like.

Related Tools

Scroll to Top