Compress PDF to 100KB Free — Step by Step Guide 2026
⚡ Quick Answer
Use QuickToolz PDF Compressor with Maximum compression mode. Upload your PDF, select Maximum, click Compress. Most scanned documents compress to under 100KB instantly. No signup, no watermark, files never uploaded to any server.
Compress PDF to 100KB Free→Why 100KB? Common Upload Limits in India
If you've ever tried to upload a document to a government portal and seen "File size exceeds limit", you're not alone. India's recruitment and government portals are notorious for strict file size requirements — often 100KB to 500KB per document.
Here are the most common portals with 100KB limits:
| Portal | Limit | Document Type |
|---|---|---|
| UPSC Online | 100KB–300KB | Photo, signature, certificates |
| SSC CGL/CHSL | 100KB–500KB | Photo, signature, documents |
| RRB (Railway) | 100KB–200KB | Photo, signature |
| State PSC portals | 50KB–200KB | Certificates, ID proof |
| Bank job applications | 100KB–500KB | All documents |
How to Compress PDF to 100KB — Step by Step
Using QuickToolz (Recommended — Free, No Signup)
- Go to quicktoolz.tech/compress-pdf
- Upload your PDF by dragging it in or clicking Browse
- Select Maximum compression mode
- Click Compress PDF
- Check the compressed file size shown in the result
- If still over 100KB, see the tips section below
- Download your compressed PDF — no watermark, no signup
Tips to Get Under 100KB
✅ Tip 1: Use Maximum compression
Always start with Maximum mode. For most scanned documents, this reduces size by 70-85%. Text remains perfectly readable.
✅ Tip 2: Split multi-page PDFs
If you need to upload a 10-page document but the portal only needs 2 pages, use our Split PDF tool first, then compress only the required pages.
✅ Tip 3: Re-scan at lower DPI
If you're scanning a document, use 150 DPI instead of 300 DPI. This reduces the source file size by 75% before any compression. 150 DPI is sufficient for text documents.
✅ Tip 4: Convert to grayscale
Color scans are 3x larger than grayscale. If the portal doesn't require color (most don't), scan in grayscale or black-and-white mode to dramatically reduce file size.
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