Compress Photo to Specific KB Online
Compress images to target sizes (e.g. 50KB, 100KB) client-side using binary search quality sweeps.
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How to use Photo KB Compressor
- 1
Select and upload the photo you wish to compress.
- 2
Enter your target file size ceiling (e.g. '50' for 50KB).
- 3
Click 'Compress Image' to run binary search sweeps.
- 4
Verify the compressed file size is below your limit and download.
Capabilities
- Compresses images to precise KB thresholds in-browser
- Uses binary search to find optimal compression ratio
- Saves original file directly if already under limit
- Completely client-side protecting personal photos
This tool operates in a sandbox directly inside your web browser. All parsing, processing, and downloads are rendered locally. Your file size, metadata, and contents never cross the network. It works completely offline.
Frequently Asked Questions
Why does it sometimes not reach the exact KB size?
If the target KB is extremely low for a large image (e.g. trying to shrink a 5MB photo to 10KB), the tool reaches the lowest quality limit (5%) to preserve basic pixels without creating pure noise.