Compress PDF to 100KB — Free Online Tool
Need to shrink a PDF to 100KB for an email attachment, a web form, or a file upload limit? Our free browser-based compressor reduces PDF file size significantly — many scanned PDFs compress from several MB down to under 200KB.
Start Redacting for Free →When You Need to Compress a PDF to 100KB
Need to shrink a PDF to 100KB for an email attachment, a web form, or a file upload limit? Our free browser-based compressor reduces PDF file size significantly — many scanned PDFs compress from several MB down to under 200KB. Your file is processed locally in your browser — never uploaded.
- Email providers often cap attachments at 10MB — but many systems require far smaller files
- Government and job application portals frequently impose 100KB–500KB upload limits
- Compressing scanned PDFs can reduce size by 70–85% without visible quality loss
- Browser-based compression is instant — no waiting for server upload and processing
How to Redact — 3 Simple Steps
Open Your PDF
Select your PDF file. It loads in your browser — never uploaded to any server.
Compress the PDF
Click Compress PDF. Our tool optimises images and streams to reduce file size as much as possible.
Download the Compressed PDF
Download your compressed PDF and check the file size. For very large source files, repeat with a lower quality setting if available.
Key Features
🔒 Your Files Never Leave Your Device
Unlike tools that upload your PDFs to remote servers, our tool processes everything locally in your browser using WebAssembly. No server ever sees your documents — not even us. This makes it one of the most private PDF tools available, completely free.
Frequently Asked Questions
Can you guarantee a 100KB output?
The final size depends on the source file's content. Scanned PDFs typically compress 70–85%. Text-only PDFs compress less. The tool will get your PDF as small as possible.
Will the compressed PDF look different?
Text-heavy PDFs compress with no visible difference. Image-heavy or scanned PDFs may show slight image softening at high compression ratios.
What if my PDF is still too large after compression?
Try splitting the PDF and compressing individual sections, then recombining if needed.
Are there any watermarks on the compressed PDF?
No — our compressor is completely free with no watermarks on any page.
Ready to Redact Your PDF?
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