How much can I compress an image without losing quality?

Most photos can be reduced by 50–70% at quality level 75–80 with no visible difference. The tool uses perceptual compression that preserves details the human eye notices.

What image formats does the compressor support?

It handles JPG/JPEG, PNG, and WebP uploads. You can also choose the output format — converting a PNG to WebP often gives an additional 25–30% size saving.

Is there a file size limit?

Since compression runs in your browser, the practical limit depends on your device's RAM. Most devices handle images up to 30–50 MB without issues.

Does compressing a PNG remove transparency?

No. PNG and WebP compression preserves the alpha channel. Your transparent backgrounds remain intact after compression.

Are my images uploaded to a server?

Never. All compression happens locally in your browser using Canvas and Web APIs. Your images never leave your device — safe for personal photos and client work.

What's the difference between lossy and lossless compression?

Lossy (JPG, WebP at <100%) discards data the eye can't easily see, giving smaller files. Lossless (PNG, WebP at 100%) reduces size without any data loss but yields smaller savings.

Can I compress multiple images at once?

Yes. Drop or select multiple files and they are each compressed individually. Download them all with a single click as a ZIP archive.

Why should I compress images for my website?

Smaller images load faster, improving Core Web Vitals (LCP), user experience, and SEO rankings. Google explicitly factors page speed into search rankings.

Image Compressor

Q: What's the difference between lossy and lossless compression?

Lossy (JPG, WebP at <100%) discards data the eye can't easily see, giving smaller files. Lossless (PNG, WebP at 100%) reduces size without any data loss but yields smaller savings.

Q: Can I compress multiple images at once?

Yes. Drop or select multiple files and they are each compressed individually. Download them all with a single click as a ZIP archive.

Q: Why should I compress images for my website?

Smaller images load faster, improving Core Web Vitals (LCP), user experience, and SEO rankings. Google explicitly factors page speed into search rankings.

Image Live

Compress JPG, PNG and WebP images while keeping quality.

About this tool

Image Compressor — Compress JPG, PNG and WebP images while keeping quality. Free, fast and private. Runs entirely in your browser at Quick Calci Tools.

Examples

Common scenarios for the Image Compressor.

Hero photo for a blog post

quality: 75
format: webp

≈ 60% size reduction with no visible loss.

Logo PNG

quality: 90
format: png

Optimised PNG ready for production.

Who uses the Image Compressor?

Common scenarios and audiences for this tool.

Web developers & designers

Optimise hero images, thumbnails, and background graphics to improve page load speed and Core Web Vitals scores.

Bloggers & content creators

Shrink photos before uploading to WordPress, Medium, or Ghost to stay within CMS file-size limits and reduce bandwidth.

E-commerce store owners

Compress product photos in bulk to speed up category pages and improve mobile shopping experience.

Email marketers

Keep email images under 100 KB so newsletters load instantly on mobile and avoid spam-filter triggers from oversized attachments.

Social media managers

Reduce file sizes before upload to avoid platform re-compression that degrades quality.

Frequently asked questions

Everything you need to know about the Image Compressor.