Send in your ideas. Deadline June 1, 2026
Grant
Theme fund: NGI0 Commons Fund
Start: 2026-04

Adding redaction to Cpdf

Robust, standards-compliant PDF redaction

Proper PDF redaction is becoming vital. It no longer suffices to crudely black out text and rasterize pages, nor to use basic PDF redaction which is unaware of modern metadata, since the resulting PDF would have been stripped of all accessibility information and no longer meet common regulatory requirements such as PDF/UA. This project extends the open-source Cpdf PDF processor to support the full spectrum of PDF redaction facilities in a robust, standards-compliant fashion. The result will be suitable for human-guided individual and batch redaction to a quality suitable for personal, legal and governmental work.

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This project was funded through the NGI0 Commons Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 101135429. Additional funding is made available by the Swiss State Secretariat for Education, Research and Innovation (SERI).