Compress PDF to 100KB Online — Free

Shrink a PDF to 100 KB or as close as possible for online forms, job portals and email. Text stays sharp, scans stay readable — free and without a watermark.

How to use Compress PDF to 100KB

  1. Upload your PDF
  2. Keep 100 KB selected
  3. Download the compressed PDF

Popular size presets

How we get your PDF under 100 KB

The compressor runs up to five Ghostscript passes, from light to strong, lowering image resolution step by step, and stops as soon as the file is 100 KB or smaller. If a PDF cannot reach the target — for example a long, text-heavy document — you still get the smallest version produced, never a bigger file.

Where a 100 KB PDF limit is common

Exact limits change with every notification, so always check the official instructions for your exam or portal before uploading.

  • Caste, income and domicile certificates on exam applications
  • Single-page ID proofs and marksheets
  • Scholarship document uploads

If it still doesn't fit

  • Upload only the pages the portal needs
  • Scan in grayscale instead of colour for text documents
  • Rescan at 150–200 DPI instead of 300–600 DPI
  • Convert pages to images, compress them, then rebuild with JPG to PDF

Private by design

Files are uploaded over HTTPS, processed on our own servers in India and deleted automatically as soon as your download starts. We do not keep copies, add watermarks or ask you to sign up.

Last updated 2026-10-06

Frequently asked questions

How do I compress a PDF to 100 KB?

Upload the PDF, keep 100 KB selected and click Compress. The download will be at or as close as possible to 100 KB.

Will the document still be readable?

Yes. Text stays as real text. Scanned pages are downsampled but remain legible at normal zoom.

Does it work on mobile?

Yes. It works in any mobile browser — no app needed.