JPEG Compressor
Adjust the quality slider and dimension scale to shrink your JPEG's file size, then download the result — free, private, and processed entirely in your browser.
About the JPEG Compressor
Our free online JPEG compressor shrinks the file size of any JPG or JPEG image, giving you full control over the quality-to-size trade-off with a live savings preview. Smaller JPEGs load faster on websites, attach more easily to emails, and take up less storage space — all without needing any design software.
Unlike most online tools, compression happens entirely inside your browser using the HTML5 Canvas API — your image is never uploaded to a server. That means it's fast, works without an internet round-trip, and keeps your files completely private and secure.
How to Compress a JPEG
Step 1
Upload your JPG or JPEG image
Drag and drop a .jpg or .jpeg file, or choose one from your device.
Step 2
Adjust quality and dimension scale
Drag the quality slider and pick a dimension scale to your desired balance of file size and sharpness.
Step 3
Compress and download
Click "Compress JPEG" and download your optimized image instantly.
Frequently Asked Questions
How much can I reduce a JPEG file size?
You can typically reduce JPEG file size by 40% to 80% with minimal visible loss in quality by setting quality around 70-80%. Lowering the dimension scale saves even more.
Is my image uploaded to a server?
No. All compression is performed 100% locally in your browser using the HTML5 Canvas API — your image is never uploaded anywhere.
What's the difference between quality and dimension scale?
Quality controls how much JPEG compression artifacting is applied at the same pixel dimensions. Dimension scale actually shrinks the image's width and height, which saves more space but produces a smaller image.
What's the best quality setting?
For photos shared online, 70-80% is a good starting point with little visible difference from the original. Go lower for maximum size savings when quality matters less, or stay near 100% when you need near-lossless results.
Does it cost money?
No. The JPEG compressor is 100% free to use, with no registration or account required.