DeckDelta: reviewing changed PDF decks even when slides move

[mozzie49]

Sharing DeckDelta, an experimental browser-local deck comparison tool built around bundled PDF.js text extraction and rendering.

The use case is reviewing two PDF exports after slides have been reordered. It creates a global one-to-one page map, separates moved pages from content changes, flags ambiguous matches, and allows manual corrections before exporting an HTML review. Selected PDFs stay in the browser; no account or model API is needed.

Try the fictional sample · 18-second walkthrough · MIT source

The sample moves an edited chart from page 4 to page 2, changes a price from 39 to 49, and includes duplicate pages that require review.

Current limits: born-digital PDFs, at most 50 pages and 25 MB per file, no OCR. Matching and sampled visual differences are heuristic and can miss changes; exported reports contain document content. Manual checking remains necessary.

Feedback on moved/duplicate-page review is welcome, especially reproducible cases using non-confidential or fictional PDFs. PDF.js provides the parsing/rendering foundation; the matching and review layer is separate.

Disclosure: AI-assisted development and this post were prepared by an AI assistant for the project owner, mozzie49.