How to compress a JPEG
- Drop your JPG or JPEG photos on the box above.
- Move the quality slider. 75% is a good default; the table shows the new size and the percentage saved.
- For large photos, also set a max width such as 2000 pixels.
- Download each file or all of them as a ZIP.
Choosing JPEG quality
JPEG quality is a scale from 1 to 100 that controls how much detail is discarded. Cameras and phones save at about 90–98%, which is far more than most uses need. Dropping to 75–85% usually cuts the size by half or more with no difference you can see at normal viewing size. Below 60%, blocky artefacts start to appear in skies and smooth areas.
Resolution matters even more than quality. A 12-megapixel phone photo is 4000 pixels wide; if it will be viewed on a screen or website, 1600–2000 pixels is enough, and resizing alone can make the file 4–6 times smaller. For a strict upload limit, type a target size in KB instead and the compressor finds the best quality automatically.
Compression happens in your browser. Your photos are never uploaded, and the output contains no EXIF metadata such as GPS location.
FAQ
What is a good JPEG quality for the web?
70–85%. It keeps photos looking sharp while making files several times smaller than camera originals.
Does compressing a JPEG again lose more quality?
Yes, each lossy re-save discards a little more. Always compress from the original photo, not an already compressed copy.
How do I compress a JPEG to a specific size?
Enter the size in the Target size box, for example 200 KB. The tool searches for the highest quality that fits.