How to compress JPG images
- Click Select files and add one or more JPG/JPEG photos.
- Move the Quality slider: 70–80 for websites, 85–92 for printing and archiving.
- Click Compress and check the new size of each photo.
- Compare before and after, then download the photos or a ZIP.
How JPEG compression works
JPEG splits an image into small 8 × 8 pixel blocks and simplifies the fine detail in each block that the eye is least sensitive to. The quality setting controls how much is simplified. Phones and cameras usually save photos at very high quality, so there is a lot of room: dropping to 75–85 often halves the file size or better with little visible change.
Settings that work
- 70–80: web pages, blogs and online shops, where loading speed matters.
- 85–92: prints, portfolios and photos you want to keep.
- Below 60: artefacts become noticeable as blocky patches, banding in skies and halos around edges.
If a portal demands an exact size limit, use Compress Image to KB instead.
Avoid compressing the same file repeatedly
Every JPEG save loses a little more information. Always compress from the original photo rather than from an already compressed copy. The output also omits EXIF metadata such as GPS location and camera details. For larger savings on huge photos, reduce the pixel dimensions with Resize Image as well. Phone photos of 12 megapixels or more are far larger than any screen needs, so pairing a moderate quality with smaller dimensions gives the biggest savings.
Frequently asked questions
What is the best JPG quality setting?
Around 80 is a good default for screens. Use 90 if the photo will be printed or edited again.
Can I compress a JPG without any quality loss?
Re-encoding a JPEG is always lossy. At high settings the loss is invisible, but removing metadata is the only truly lossless saving; see Remove EXIF Data.
Is EXIF data removed?
Yes. Compressed files do not include camera details or GPS coordinates.
Are photos uploaded?
No. Compression happens in your browser.