JPEG Compressor
Large photos slow pages down and bump against upload limits on forms, email and content systems. The JPEG Compressor re-encodes an image at a lower quality setting, which throws away detail the eye is least likely to miss and produces a much smaller file.
You control how far the compression goes. Drag the quality slider down for a smaller file, up for a closer match to the original, and compare the before and after sizes before you commit to the download.
Runs in your browser. JPEG Compressor processes your input on your own device. Nothing you enter or upload is sent to a server.
How to use the JPEG Compressor
- Drop a JPG or PNG onto the upload area, or click it to pick a file.
- Move the quality slider to trade file size against visual fidelity.
- Check the original and compressed sizes shown beneath the preview.
- Download the compressed image.
Supported formats: JPG, JPEG and PNG input; JPEG output.
Things worth knowing
- Compression is lossy — the original detail cannot be recovered from the compressed file.
- Very large images may take a moment to process, and are limited by your device's available memory.
Frequently asked questions
Does compressing a JPEG reduce its quality?
Yes. JPEG compression is lossy, so some detail is always discarded. At high quality settings the difference is usually hard to see at normal viewing size, but it is a real trade-off rather than a free saving. Compare the preview against the original before downloading.
How small will my file get?
It depends on the image. Photographs with lots of gradients and texture compress a great deal; flat graphics, screenshots and images that have already been compressed once have much less to give. The tool shows you the actual saving for your file.
Is my image uploaded anywhere?
No. The compression runs in your browser using a canvas element, so the file stays on your device and is never sent to a server.
Can I compress the same image twice?
You can, but it is rarely a good idea. Each pass discards more detail permanently, and the second pass usually saves far less than the first. Start from the original file whenever you can.