How to Compress a JPG Image Online
Compress a JPG online by lowering JPEG quality (or re-encoding at a chosen quality) in your browser. MiniFyPNG’s free JPG compressor shows the real size change and downloads locally without uploading the photo.
Reduce JPG and JPEG size in your browser with a quality slider — nothing is uploaded for this tool.
Open the free JPG compressor, add a photo, set quality, compress in the browser, and compare original versus compressed sizes before downloading.
What is JPG compression?
JPG compression re-encodes a JPEG photo with a quality setting. Lower quality usually means a smaller file and more lossy artifacts; moderate settings often look fine for photos while cutting bytes.
How do you compress a JPG online?
- 1
Open the JPG compressor
Use the free JPG compressor page. Output is locked to JPEG.
- 2
Add a JPG or JPEG file
Drop the photo or choose it from your device. Files are checked by content, not only by extension.
- 3
Set quality
Move the quality slider. Lower values usually mean a smaller file; higher values keep more detail.
- 4
Compress and compare
Run compression in the browser, then compare original and compressed sizes with proportional weight bars.
- 5
Download the result
Download when the balance looks right, or adjust quality and compress again.
When does JPG compression help?
- A camera photo that must stay under an email or form upload limit without converting away from JPG.
- A product shot for a site where you want a smaller JPEG before uploading to a CMS.
JPG compression FAQ
Does lower quality always look worse?
Often yes at very low settings, but moderate reductions can be hard to notice on photos. Always check the preview size and visual result.
Can I hit an exact byte size?
For a fixed target like 100 KB, use the compress-to-100 KB tool. The JPG compressor focuses on quality-based control.
What about transparency?
JPG has no alpha channel. If you need transparency, keep PNG or convert carefully to WebP.
Are files uploaded?
No. Compression runs in your browser for this tool.