Get this job done without an upload detour
Use the smallest target in this collection when a form rejects attachments above 100 KB.
- 1Choose a short PDF
- 2Keep the 0.1 MB target preset
- 3Compress and verify whether the result meets the portal limit
Exact-size compression · 100KB
Compress PDF to 100KB
Aim for an ultra-small 100 KB PDF for strict upload portals using a dedicated target preset.
✓ Files stay on your device✓ No signup to get started✓ Free browser workflow
Your document stays under your control
The strict 0.1 MB target is applied locally; the source PDF is never sent to a size-optimization server.
Check these before you start
- 100 KB is realistic mainly for very short, low-detail documents.
- The target is not guaranteed because usable PDFs have structural overhead.
- Strong downsampling can make small text or images difficult to read.
Meet a legacy 100 KB portal limit
- Input
- A one-page 720 KB monochrome confirmation
- Result
- The smallest readable local result, with a measured size showing whether 100 KB was reached.
Verify the privacy claim yourself
The strict 0.1 MB target is applied locally; the source PDF is never sent to a size-optimization server. You can inspect your browser Network panel while the job runs to confirm whether any PDF body leaves the device.
Learn how to verify local processing