Compress PDF Below 1MB — Free Online Compressor
Large scanned PDFs can easily reach 10MB, 20MB, or more — making them impossible to email or upload to web portals.
Start Redacting for Free →Why File Size Matters for PDF Sharing
Large scanned PDFs can easily reach 10MB, 20MB, or more — making them impossible to email or upload to web portals. Our free compressor reduces PDF sizes dramatically in your browser. Most scanned documents compress to well under 1MB without noticeable quality loss. No uploads, no watermarks, no account.
- Gmail and Outlook cap attachments at 10–25MB — shared drives are often more practical for large files
- Many web portals have a 1MB–5MB document upload limit
- Smaller PDFs transfer faster over messaging apps like WhatsApp and Teams
- Browser-based compression is instant — no waiting for server round-trips
How to Redact — 3 Simple Steps
Open Your Large PDF
Select your PDF — no size limit. It loads locally in your browser.
Compress It
Click Compress PDF. Our tool optimises every image and PDF stream to reduce file size as much as possible.
Download the Smaller PDF
Download the compressed version. Most multi-MB scanned PDFs compress to well under 1MB.
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
How much smaller will my PDF get?
Scanned PDFs typically compress 60–85%. A 10MB scanned document usually compresses to 1.5–4MB. Image-heavy PDFs: 40–60% smaller. Text-only PDFs: 20–40% smaller.
Is there a file size limit for the input PDF?
No hard limit — your browser's available memory is the only constraint. Very large PDFs (100MB+) may require a more powerful device.
Will the text still be readable after compression?
Yes — text in PDFs is stored as vectors, not images, and is unaffected by compression. Only embedded images are optimised.
Are there watermarks on the output?
None. Our compressor is completely free with no watermarks on any page.
Ready to Redact Your PDF?
Free, instant, private — no account or software required.
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