PDF Processing Tips
Learn tips for processing PDF files
CAJ to PDF: Complete Guide to Converting CNKI Academic Papers
Can't open a CAJ file? Convert to PDF online instantly — no CAJViewer needed. Includes Tampermonkey script tips, encoding fixes, bookmark rebuilding, and more.
The Complete Guide to PDF Cropping & Margin Removal: Solutions for Every Scenario from Mobile Reading to Print Bleeds
Too much whitespace in your PDF? A systematic guide covering CropBox mechanics, e-reader optimization, academic annotation margins, print bleed setup, and OCR noise control — with a one-click cropping tool.
PDF Won't Open or Shows as Corrupted? Online Repair Steps + Common Causes
PDF won't open, shows 'file is corrupted', or upload fails? Repair the structure online first, then troubleshoot by cause — encryption, truncation, fonts — and get the shortest path to OCR, Word conversion, or compression.
PDF Password Types Explained: Open Password vs. Permission Password — Security Differences & Practical Guide
What's the difference between a PDF open password and a permission password? Open passwords use AES-256 to encrypt content and can't be bypassed; permission passwords are merely a 'gentleman's agreement' and can be removed instantly. This article breaks down the underlying mechanisms and best practices for both.
PDF to Text (TXT) Best Practices: Do These Steps Before Feeding AI for Summarization / Retrieval
Want to feed PDF text to ChatGPT/Claude/Gemini? Crop, convert to B&W, then extract text — the tool auto-repairs and OCR — significantly reducing garbled text, broken lines, and lost table structure.
PDF Rasterization & Anti-Tampering: A Complete Guide from Pixel Locking to Cryptographic Defenses
Learn how PDF rasterization eliminates editable content through 'visual locking,' and how digital signatures build a document trust chain. Includes step-by-step instructions and tool recommendations.
Scanned PDF to Editable Word: Complete Guide (OCR + Layout Fixes)
Turn scanned/photo PDFs into editable Word — with a 10‑second OCR check, preprocessing tips, common pitfalls, and reliable fallbacks.
Bank Statement PDF to Excel — Accurate Extraction, OCR, and Redaction
Convert bank statements/account statements/billing PDFs to editable Excel with high accuracy. Covers OCR for scans, header alignment, currency/date recognition, batch workflows, and privacy compliance.
Compress Resume PDF to 2MB — Clear and ATS‑Friendly
Meet the common “≤2MB” resume limit without losing clarity. Practical online settings plus native Windows/macOS ideas, with tips for black‑and‑white, unified page size, and image optimization.