Compress JPG Photos
Shrink JPG photos with MozJPEG, an encoder tuned for smaller files at the same visual quality. You pick the quality; the default of 75 suits most photos.
- On-device
- No sign-up
- Batch
- Free, no watermark
Drop images on the plate
or paste with Ctrl/⌘ V
Processed on this device
How it works
- 01Drop, choose or paste the JPG photos you want to shrink.
- 02Set the quality slider, or leave it at 75.
- 03Select Process and check the size saved on each photo.
- 04Download photos one by one or select Download all for a ZIP.
Why use this tool
MozJPEG encoding
Progressive encoding and optimized Huffman tables squeeze extra bytes out of every photo compared with a basic browser export.
Quality under your control
Start at 75 and go lower for thumbnails or higher for prints. The new size and percentage saved show for each file.
Big camera photos welcome
Large JPGs up to 50 MB and 100 megapixels are accepted, up to 200 files at a time.
Supported formats
Use cases
Real estate listings
Agents uploading dozens of room photos can cut each one down so listing portals accept them and pages open quickly for buyers.
Product photos for a shop
Bring large studio JPGs down to a size your store platform loads fast, while keeping enough quality for zoomed product views.
Sending holiday photos
Compress a set of trip photos before emailing them to family so they fit in one message instead of five.
Technical details
JPG and JPEG are the same format; the extension is just spelled two ways. Pixellin re-encodes each photo with MozJPEG, which uses progressive encoding, so the image appears coarse-to-fine while loading, and optimized Huffman tables. Photos straight from a camera or phone are usually saved at very high quality and shrink a lot at 75 with no difference you’d notice on a screen. At very low settings, skies and smooth gradients start to show banding and blocky edges.
Every JPG save is lossy, so compress from the best original you have rather than from a copy that has already been compressed several times. If you want Pixellin to pick the quality for you, try Optimize JPG, which stops at the smallest size that still measures as visually identical. When a photo can’t usefully get smaller, it is kept unchanged and marked “Already optimized”.
Your files stay with you
This tool runs entirely inside your browser using Web Workers and WebAssembly. Your images are never uploaded, never stored on a server and never used to train AI. Close the tab and they’re gone. Learn more
Frequently asked questions
What quality should I use to compress a JPG?
75 is a good default for photos viewed on screens, and it’s where Pixellin starts. Use 80–90 for photos that may be printed or zoomed, and 60–70 for thumbnails or email previews where size matters more than fine detail.
Is JPG the same as JPEG?
Yes. JPG and JPEG are the same format. Older versions of Windows limited file extensions to three letters, so .jpg became the common spelling. This compressor handles files with either extension in exactly the same way.
Can I compress a JPG without losing quality?
Not strictly, because JPG compression is lossy. At quality 75 to 85 the loss is usually invisible on screen. For the smallest file that measures as visually identical, the Optimize JPG tool tests several quality levels with SSIM and picks one for you.
How much smaller will my JPG get?
It depends on the original. Camera and phone photos are often saved at very high quality and shrink a lot. Images that were already compressed shrink less, and if re-encoding wouldn’t help, the original is kept and marked “Already optimized”.
Do my photos leave my computer?
No. MozJPEG runs as WebAssembly inside your browser tab, so photos are read and encoded locally. No copy is stored on any server, which matters for personal or client photos you’d rather not hand to a third party.
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