Shrink PDF documents to under 100KB while preserving sharp vector typography and clean graphics.
To compress a PDF to 100KB: 1. Drag & drop your PDF file. 2. The exact 100 KB ceiling is pre-selected. 3. Optionally toggle 'Convert to Black & White' for maximum reduction on scanned certificates. 4. Click 'Compress PDF' and download your clean, portal-compliant file under 100KB.
| Document Type | Mandatory Size | Format | Requirements |
|---|---|---|---|
| CBSE & ICSE Board Marksheets | Max 100 KB | PDF only | Official matriculation / 12th passing certificate |
| SSC CGL / CHSL Category & PwD | 100 KB – 200 KB | Central government SC/ST/OBC/EWS reservation validity | |
| RRB Railway Technical Qualification | 100 KB – 200 KB | PDF only | ITI / NAC / Engineering diploma certificates |
| Domicile & Income Verification | 50 KB – 100 KB | Tahsil / Revenue authority issued state domicile proof | |
| Central University Admission Portals | Max 100 KB | CUET UG/PG student enrollment & merit rank slips |
State and national admission portals in India, the US, and Europe frequently enforce a strict 100KB ceiling on uploaded academic transcripts, identity cards, and diplomas. When scanners produce 2MB to 5MB files, candidates face form rejections.
PDFBolt decouples the text layer from background raster images. It applies loss-resistant JPEG/Flate compression to images while preserving crisp vector typography, ensuring your document remains clean when reviewed by admissions committees.
Unlike generic raster tools that downsample the entire page into a pixelated bitmap, PDFBolt isolates typography and vector artwork. Text characters, roll numbers, and dates of birth remain vector-crisp at print-grade resolution.
Only background paper textures, scanner margins, and embedded color images are compressed to web-standard 150 DPI, preserving 100% legibility.
Scanned certificates frequently contain color noise, scanner grain, and aged yellow paper hues that inflate file size without adding value.
Toggling our Convert to Black & White option strips out unnecessary color channels while maintaining high 300 DPI edge sharpness. This immediately frees up to 80% more space, making it easy to hit 100KB even on multi-page certificates.
Yes! Text and vector lines are preserved untouched. Only background images are downsampled.
Simply enable our 'Convert to Black & White (Grayscale)' toggle or type a lower target (like 90 KB) into the Exact Target Size box. Grayscale eliminates background color noise, effortlessly reducing file size by up to 80%.
Yes! For text-based documents and standard marksheets, PDFBolt easily fits 3 to 5 pages into under 100KB by downsampling background scanner noise while preserving vector typography.
Yes. 100KB is the standard ceiling across major admission portals (such as GATE, State CETs, and Central Universities). PDFBolt ensures compliance with official 150 DPI verification guidelines.
Never. PDFBolt runs 100% locally in your browser memory using WebAssembly. Your marks, personal information, and grades remain completely private on your device.
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