What this tool does
Compress an image toward 100KB locally with automatic quality selection and an optional size limit.
Practical guidance
Check whether the destination measures decimal KB or binary KiB and leave a small safety margin. A result around 95–98KB is safer for upload forms with strict server-side limits.
Three simple steps
- Add an image.
- Adjust the optional dimension limit.
- Download the result closest to 100KB.
Private by design
Your images are processed in this browser. They are not sent to our server.
Browser processing limits
A target size is a best effort. Complex images may need lower quality or smaller dimensions.
Frequently asked questions
Is 100KB suitable for forms and websites?
Many forms and websites accept it, but always check the exact limit and required format.
Does the tool add a watermark?
No. Image PDF Tools does not add a watermark to processed images.
Concrete input and output example
Input a 2400×1600 travel photo at 2.4MB and target 100KB. A 96KB WebP may pass a strict portal while preserving more detail than forcing the full dimensions into JPEG.
Browser compatibility notes
Reviewed against the implementation and required web APIs on 2026-08-12. Use a current browser where these APIs are available and verify important output on your device.
- Chrome / Edge (current desktop)
- Requires local decode, canvas, encoding, Blob download, and enough memory; verify the downloaded image.
- Firefox (current desktop)
- Uses the same standard local APIs; color rendering can differ slightly from Chromium.
- Safari (current desktop)
- Uses canvas and Blob downloads; available memory and codec behavior remain WebKit-controlled.
A tool-specific question
Why download 96KB instead of exactly 100KB?
Some services use decimal KB, others KiB, and some add processing overhead. A small safety margin reduces rejection risk.