DOI Extractor

Extract DOIs from PDF-copied text — regex detection with optional CrossRef validation

All PDF Reading

Text containing DOIs

Validate DOIs via doi.org (slower)

Extracted DOIs

DOIs will appear here…

More in PDF Reading

Note-to-Markdown Snapper

Formats raw PDF annotations into atomic Markdown notes with backlinks.

ArXiv Sync Monitor

Checks ArXiv preprint IDs against the API to detect published DOIs.

Supplemental Fetcher

Fetches supplementary material links for a DOI via Unpaywall and CrossRef.