Compress
Compress JPG Images
Shrink JPG photos to fit email and upload limits, and see exactly how much you saved. Your photos are compressed on your device and never uploaded.
Your images never leave your device
How to use Compress JPG
- Drop your JPG files on the page or pick them from your device.
- Lower the quality setting until the size is small enough, checking the size before and after.
- Download each compressed JPG, or all of them together as a zip.
Frequently asked questions
Does compressing a JPG reduce its quality?
Yes, a little, because JPG is lossy. At moderate settings the difference is hard to see at normal size. Lower settings save more space and show more softness, so find the lowest setting that still looks good to you.
How small can I make a JPG?
It depends on the photo. A 4 MB phone photo often drops below 1 MB with little visible change. Combine compression with a smaller pixel size for more.
Why does my compressed JPG look blocky?
The quality setting is too low or the picture was compressed before. Raise the quality and start again from the original file.
Is my photo uploaded for compression?
No. Compression runs in your browser using WebAssembly, so the photo stays on your device. There is no signup and no watermark.
About Compress JPG
JPG is a lossy format, which is what makes it compressible. Each file stores a trade-off between detail and size, and this tool lets you change that trade-off. The JPG is re-encoded with MozJPEG, an encoder designed to produce smaller files than most cameras and editors, so you often save space even at a high quality setting. Push the quality lower and the file shrinks further, until you begin to notice softness and blocky patches.
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The savings can be large. Phone photos are often 3 to 6 MB, and a moderate setting commonly brings them under 1 MB with no visible difference at normal viewing size. That is the range you need for forms that cap uploads at 1 or 2 MB, for sending several photos in one message, and for pages that load quickly. Email services typically limit attachments to around 25 MB in total, so compressing a batch of vacation photos can make the difference between sending them in one email or several.
To choose a setting, compress, compare and zoom in. Look at faces, text and smooth areas such as sky, since these show problems first. If the picture is still too large after you compress it, reduce its pixel dimensions with the resizer, which saves much more than quality alone. Compress from your original photo, not a copy that was compressed already, because each pass discards more.