UnpassHow to Compress a PDF to 100 KB
Open the Compress PDF tool →Some portals cap PDF uploads at 100 KB, 200 KB or 500 KB. If your file is bigger, it won't upload. Here's how to bring a PDF down to a small target size.
How to compress a PDF to a small size
- Open the Compress PDF tool —
- Upload your PDF —
- Choose "High" compression — This gives the smallest file — best when you need to hit a tight KB limit.
- Download and check the size — If it's still over, split the PDF and upload the key pages only.
💡 Text-only PDFs are already tiny. Big PDFs are usually scanned pages, which compress the most — High compression can cut them by 80% or more.
If it still won't fit
Split the document and keep only the pages the form actually needs — fewer pages means a much smaller file.
Ready? Use the Compress PDF tool — free, and your file never leaves your device.
FAQ
Can I compress a PDF to exactly 100 KB?
High compression gets most scanned PDFs well under 100 KB; split it if needed.
Will the text still be readable?
Yes, text stays legible even at High.
Is it free and private?
Yes — nothing is uploaded.
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