Compress PDF to 100KB

1. Upload your PDF (up to 50 MB).
2. The compressor automatically targets 100 KB or under.
3. Download the compressed PDF.

100 KB is very tight for a PDF — usually only achievable for text-based documents or by aggressive image downsampling. Best for exam portals and forms with strict caps.

100 KB is a common cap on exam portals, government forms, and some job applications. Most PDFs are much larger — a single-page scanned document is often 200-500 KB. Our compressor iteratively downsamples images and strips metadata until the output is 100 KB or under.

The compressor analyzes the PDF, downsamples embedded images to lower resolutions, re-encodes them with efficient compression, and strips metadata. It iterates until the output is 100 KB or under. Text is preserved losslessly.

• Exam portal document upload (100 KB cap).
• Government form document upload.
• Job application document upload.
• Meeting strict upload limits on forms.
• Reducing PDF size for messaging apps.
• Preparing documents for size-capped portals.
• Reducing scanned document size drastically.

100 KB is very tight — scanned PDFs will have low-resolution images but stay readable. Text-based PDFs compress best. Best for exam portals and forms where size matters more than print quality.

• Very tight — scanned PDFs show visible resolution loss.
• Image-heavy PDFs may become pixelated.
• Text-based PDFs compress much better.
• Encrypted PDFs must be unlocked first.
• Not suitable for print quality.

• Output PDF opens in every browser, reader, and OS.
• Text stays searchable and selectable.
• Accepted by exam portals and government forms.
• Standard PDF — no special software needed.
• Ideal for strict upload limits.

• 100 KB is very tight — text documents compress best.
• Scanned PDFs will show low resolution.
• For higher quality, use the 200 KB or 500 KB variant.
• Text stays sharp regardless.
• Batch-compress up to 50 MB at once.

Need to hit an exact size? Use our dedicated target-size tools:

PDF can't reach 100 KB without severe quality loss

Use the 200 KB or 500 KB variant. 100 KB is extremely tight for scanned or image-heavy PDFs.

Text is still sharp but images are pixelated

This is expected — text is vector (sharp), images are downsampled to hit the target.

Portal rejects the file even under 100 KB

Check the portal's other requirements (page count, dimensions, format).

• PDF Association — ISO 32000