pdf-validation

A professional ChatGPT Skill for creating, editing, reviewing, extracting, validating, and visually improving production-ready PDF files.

An open, reproducible PDF corpus for benchmarking and regression testing across real-world, synthetic, malformed, accessibility, archival, rendering, parsing, repair, and conformance cases.

Run Apache PDFBox without JVM. Useful for PDF validation.

A local toolkit for creating PKCS#12 certificates, signing PDF documents, and validating electronic signatures.

Production Telegram bot that finds & delivers Arabic book PDFs in <10s. 14 libraries searched in parallel via Firecrawl, multi-stage PDF validator (HTTP→magic bytes→text density→AI judge), 10-provider AI summaries, admin AI agent (59 tools, ReAct loop), engagement loop (streaks + badges + referrals), Telegram Stars payments.