How to Compress PDF Documents Under 100KB Without Losing Text Legibility
A step-by-step technical guide on compressing scanned marksheets, caste certificates, and identity documents to under 100 KB and 300 KB for government recruitment portals.
Why Portals Require PDF Marksheets Under 100 KB or 300 KB
State recruitment portals (such as UPSSSC, BSSC, MPPEB) and UPSC DAF forms mandate scanned academic marksheets and category certificates uploaded as single-page or multi-page PDFs strictly under 100 KB or 300 KB.
Standard desktop scanners output 300 DPI multi-megabyte PDFs. Aggressive compression can blur small roll numbers, board seals, and QR verification codes.
- Scan documents at 150 DPI greyscale or color to balance sharpness and file size.
- Always verify that the official QR code and roll number remain razor-sharp after compression.
PDF Compression Benchmark Test
Original Scanned Marksheet PDF: 1.84 MB, 300 DPI color scan with university seal.
StudyBudyAI Calibrated PDF: 88.4 KB (under 100 KB target threshold).
Readability Result: University stamp, registration number, marks table, and QR code 100% legible.
PDF Document Upload Thresholds for Major 2026 Examinations
| Examination / Portal | Document Type | Target File Size | DPI Recommendation |
|---|---|---|---|
| UPSC Civil Services DAF | Marksheets & Degree | Under 300 KB | 150–200 DPI |
| UPSSSC PET / Lekhpal | 10th & 12th Marksheets | Under 100 KB | 150 DPI |
| BPSC TRE / Combined Exam | Educational Certificates | Under 100 KB | 150 DPI |
| State Police Recruitment | Caste / Domicile Certificate | 50 KB – 300 KB | 150 DPI |
| Banking IBPS / SBI PO | Declaration / Category Certificate | Under 500 KB | 200 DPI |
Frequently Asked Questions
Will compressing my PDF invalidate the digital signature or QR code?
StudyBudyAI uses vector-preserving compression techniques that retain embedded text and QR code clarity while optimizing raster scan layers.
Can I combine multiple semester marksheets into a single 100KB PDF?
Yes. Use our PDF Merger tool first to combine pages, then run the merged file through the PDF Compressor targeting under 300 KB.
Are my uploaded certificates stored on your server?
No. All PDF operations are handled 100% client-side inside your browser memory using WebAssembly. Your documents remain private.