Free Image Compressor
Reduce JPG, PNG and WebP file sizes in your browser. Adjust quality, compare before/after sizes, and download — your files never leave your device.
Your files never leave your device. All processing happens in your browser.
How to Compress an Image
- Upload your image. Drag a file onto the box or click to browse. It loads in the browser — nothing is uploaded.
- Choose an output format. JPG works well for photos. WebP produces smaller files at the same quality. PNG is lossless — switch to JPG or WebP to see file size reductions.
- Set the quality. Use the Minimum / Web / High presets for common needs, or drag the slider for fine control. The savings banner updates live to show the exact before/after sizes and percentage saved.
- Download. Click Download compressed image to save the result.
Which Format Should You Use?
| Format | Best for | Transparency | Relative size |
|---|---|---|---|
| JPG | Photos, gradients | No | Medium |
| WebP | Photos + graphics, web | Yes | Small |
| PNG | Screenshots, logos, text | Yes | Large |
Frequently Asked Questions
Are my images uploaded to a server?
No. Compression happens entirely in your browser using the Canvas API. Your files never leave your device — open your browser's Network panel and you will see zero upload requests.
What quality setting should I use?
For photos on websites, quality 75–80 is a good starting point: files are typically 50–70% smaller than the original with barely noticeable quality loss. For print or archiving, use 90+. For thumbnails or previews where quality matters less, 50–60 is fine.
Will compression make my image smaller in pixels?
No. This tool only changes the encoding quality — the pixel dimensions (width × height) stay exactly the same. If you also want to reduce dimensions, use the Image Resizer first, then compress the result.
Why does changing to WebP save so much more space than JPG?
WebP uses a more modern compression algorithm than JPG. At the same visual quality, WebP files are typically 25–35% smaller than JPG. The trade-off is that a small number of very old browsers and apps do not support WebP.
Why does PNG not have a quality slider?
PNG is a lossless format — every pixel is stored exactly. There is no quality trade-off to make, so a slider has no effect. To significantly reduce the size of a PNG, the only option is to switch to a lossy format (JPG or WebP) or to reduce the image dimensions.
Related Tools
- Compress for Web → Auto-find the highest quality that fits under 200 KB.
- Compress for Email → Batch-compress photos to fit email attachment limits.
- Image Resizer → Reduce pixel dimensions alongside file size.
- Browse all tools →