Compress JPG

Reduce JPG file size for an upload or email attachment.

Supported files: JPG, JPEG · Up to 50 MB per file · up to 50 files

Smaller sizeHigher quality
  • Free
  • No sign-up
  • No file upload

Example result

Example settings: Quality 80
Example result: Compress JPG (Before)
Before
Example result: Compress JPG (After)
After

−42%

Before · source.jpg342.4 KB
After · compress-jpg-1.jpg200.2 KB

How to compress a JPG

  1. Choose your JPG photos.

  2. Lower the quality or enter a target size in KB.

  3. Allow smaller dimensions only if a smaller image is acceptable.

  4. Check the new sizes and download.

How quality and target size work together

Quality is not a percentage of the original file size. It tells the MozJPEG encoder how much fine detail it may simplify, and the file shrinks as the value drops. Without a target, every photo is saved once at your Quality, 80 by default. Dimensions stay the same unless you allow resizing.

With a target, your Quality becomes the upper limit. If the first result is too big, the tool searches lower values, down to 5, for the highest quality that fits. If none fits and resizing is allowed, the image is scaled to 80% of its width and height at a time and saved at quality 40 until it fits or becomes very small. Start from the original photo, since each new JPG generation loses a little more detail.

Supported files

JPG, JPEG → JPG

  • Up to 50 MB per file · up to 50 files
  • Total input: 300 MB
  • Total output: 150 MB
  • Maximum image size: 40 MP · 16,384 px

Static images only. Animated PNG and WebP are not supported.

Frequently asked questions

How do I aim for a JPG under a file-size limit?

Enter a target size in KB or lower the quality. If the target is missed, a note appears under the result.

Why is my compressed JPG the same size as before?

If saving at your Quality would make the file bigger, the tool gives you the original file instead. This often happens with JPGs already saved at low quality. Lower the Quality or enter a Target size below the current size to try for a smaller result.

What happens if the target size cannot be reached?

Without resizing, you get the lowest-quality attempt from the search, along with a warning. Turning on Allow smaller dimensions to meet the target lets the tool reduce the pixel size instead, which often looks cleaner than extreme compression.

Does compressing remove location data from my photos?

Re-encoded files do not carry over EXIF data such as GPS location, camera model or capture date. If the tool returns your original file because compression would have made it bigger, that file still contains its metadata.

Are my files uploaded to a server?

No. Files are processed in your browser on this device and are not sent to BlurMe servers.

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