Image Compressor
Reduce image file size with an adjustable quality slider and see the savings live — private and free.
Compress images without the hassle
The Image Compressor reduces the file size of your photos using an adjustable quality slider, showing the original size, the new size, and how much you saved in real time. Upload an image, find the sweet spot between quality and size, and download — all locally in your browser, so your images stay private.
Why compress images?
Large images are the number one cause of slow web pages. Compressing them dramatically cuts load times, improves Core Web Vitals, saves bandwidth and storage, and helps you stay under upload limits for forms and email. The trick is balancing file size against visible quality — and a live preview with a savings counter makes that easy.
How to use it
- Upload an image.
- Drag the quality slider and watch the size and preview update.
- Download the compressed JPG when it looks right.
Finding the right quality
| Quality | Best for |
|---|---|
| 85–100% | Print or high-detail photos |
| 70–85% | Web images — great balance |
| 50–70% | Thumbnails and previews |
For most web use, 70–80% quality cuts file size substantially with little visible difference. Compare the preview to the original to pick the lowest quality that still looks good.
How JPEG compression works
JPEG is a "lossy" format: it discards detail the eye is least likely to notice to shrink the file. Lowering the quality removes more detail and saves more space. Because the compressor re-encodes through your browser's canvas, photos with smooth gradients and natural scenes compress especially well, while sharp text or line art may be better kept as PNG.
Private by design
Your image is processed entirely in your browser and never uploaded. That makes the compressor safe for personal photos and confidential graphics, with no upload wait and no server ever seeing your files.
Private and free
The tool is completely free with no sign-up and no watermarks. Compress as many images as you like.
Frequently asked questions
Are my images uploaded?
No. Compression happens entirely in your browser. Your images never leave your device.
What quality should I use?
70–80% is ideal for the web — big savings with little visible loss. Use higher for print, lower for thumbnails.
What format does it output?
Compressed images are saved as JPEG, which gives the best size reduction for photos.
Is it free?
Yes, completely free with no sign-up and no watermarks.