Signature PDF
Open-source web app to sign, organize, edit metadata, and compress PDFs
Signature PDF is an open-source web application for signing and manipulating PDF documents directly in the browser. It supports both solo signing and shared multi-signer workflows, alongside common PDF organization and optimization tools.
Key Features
- Add signatures, initials, stamps, text, strike-through annotations, and watermarks to PDFs
- Multi-signature workflow via a shared link (optional server-side PDF storage)
- Page organization tools: merge, reorder, rotate, delete, extract pages, and generate booklets
- PDF optimization: compress PDFs to reduce file size
- Edit PDF metadata (add, modify, or remove predefined fields)
- Optional server-side encryption for stored PDFs using a symmetric key known to signers
- Optional server-side digital signature using certificate tooling (NSS database and pdfsig)
Use Cases
- Collect signatures from multiple people on the same document using a shareable link
- Prepare PDFs by merging files, extracting pages, and standardizing page layout before sending
- Reduce PDF size for email delivery or archiving while retaining a usable document
Limitations and Considerations
- Multi-signature mode requires storing PDFs on the server, which impacts storage and retention planning
- Digital signature support depends on additional system tools and certificate setup on the host
Signature PDF is well-suited for organizations that need a lightweight, browser-based PDF signing and editing workflow. It combines signing, page management, metadata editing, and compression in a single self-hostable interface.
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Tech Stack:
JavaScript
INI
Docker
Bootstrap
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