Free Image Compressor
Shrink JPG, PNG and WebP file sizes by up to 90% without visible quality loss. Batch process up to 20 images at once — all in your browser, nothing uploaded.
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Drop images in the left panel to get startedWhat Is Image Compression?
Image compression reduces the file size of a picture by removing data that the human eye is unlikely to notice. The result is a smaller file that looks nearly identical to the original but loads faster, uses less bandwidth and takes up less disk space.
There are two broad approaches:
- Lossy compression — permanently discards some image data. JPEG and WebP are lossy. You can achieve dramatic size reductions (70–90%) with quality settings that are visually indistinguishable from the original.
- Lossless compression — rewrites the file more efficiently without discarding anything. PNG is lossless. Size reductions are more modest (10–30%) and depend on the image content.
How quality settings work
| Quality | Best for | Typical size reduction |
|---|---|---|
| 10–30% | Thumbnails, quick previews, icons | 85–95% smaller |
| 30–50% | Social media, email attachments | 75–85% smaller |
| 50–70% | Web images, blog posts | 60–80% smaller |
| 70–85% | Most photos — visually lossless | 50–75% smaller |
| 85–100% | Print, archival, professional work | 20–50% smaller |
75% is the sweet spot for most use cases. Above 85% the size reductions become small; below 50% the artifacts become obvious.
Which format should I choose?
| Format | Compression | Transparency | Best for |
|---|---|---|---|
| JPEG | Lossy | No | Photographs, web images, universal compatibility |
| WebP | Lossy or lossless | Yes | Best quality/size ratio — modern websites |
| PNG | Lossless | Yes | Screenshots, logos, images with transparency |
Why you should compress images
- Faster page loads. Images are typically 60–70% of a webpage's total weight.
- Better SEO. Google uses page speed as a ranking factor.
- Lower bandwidth costs. For high-traffic sites, image compression reduces CDN bills.
- Better mobile experience. Mobile users on slow connections feel the biggest improvement.
- More storage. Compress an old photo library and reclaim gigabytes of disk space.
About metadata and EXIF
When you compress an image through the Canvas API, most metadata is stripped — including camera make and model, GPS coordinates, date taken, and software used. This is usually a privacy win, and it also saves space since EXIF data can add 10–50 KB per image. Image orientation is preserved, so portrait photos stay upright.
Common use cases
Website Optimisation
Compress hero images and product photos for faster Core Web Vitals scores.
Email Attachments
Shrink photos to fit under email size limits without visible quality loss.
Social Media
Compress images for Instagram, Twitter, Facebook and LinkedIn uploads.
Cloud Storage
Reduce your Google Drive, Dropbox or iCloud storage footprint.
E-commerce
Speed up product galleries with optimised images that still look sharp.
Print Preparation
Resize high-res photos before printing to save paper and ink.
Blog Posts
Compress featured images and inline photos for faster loading pages.
Archival
Bulk-compress old photo folders to free up disk space.
Privacy and security
This image compressor runs entirely in your browser. Every step — reading the file, decoding it, re-encoding it and producing the download — uses local browser APIs. Your images never leave your device. Nothing is uploaded, stored or transmitted to any server.