Local-first document redaction
by Student Radar
Redact UK documents on your own device. Nothing leaves your laptop.
Subject Access Requests, safeguarding bundles, FOI responses. Drop in a PDF, get a redacted PDF back with a full audit trail. The document never reaches our servers.
Local-first by design, with a human reviewer kept deliberately in the workflow.
Why it exists
UK schools, councils and NHS teams redact thousands of pages a year by hand. Adobe Acrobat sends content to Adobe's cloud. Most online redactors do the same. For documents containing safeguarding notes, medical history or criminal allegations, that's not a tradeoff most DPOs are comfortable making.
Doing it manually takes hours per bundle. Mistakes carry real consequences; a missed name in a SAR response is reportable to the ICO.
Inkwell runs entirely on your device. The detector, the redaction - all of it.
The workflow
Names, addresses, postcodes, NHS numbers, NI numbers, UPNs, ULNs, UCIs, hospital numbers, DBS references, driving licences, passport numbers, bank details, dates of birth, and special-category facts under UK GDPR Article 9 and Article 10.
Drop a PDF in. Review the suggested redactions. Export a redacted PDF where the underlying text is removed, not just covered.
No upload. No cloud processing. No telemetry of document content.
Four deliberate steps
Inspect the evidence
Review the Inkwell runtime evaluation licence, the detector data sources and licences, and the V19 human-review receipt.
Specific by design
Built for UK documents specifically. UK postcodes, NHS Mod 11 validation, HMRC NI number rules, DfE pupil identifiers, HMCTS case references, Welsh and Scottish address forms, particle names, and the safeguarding vocabulary that statutory guidance actually uses.
Built by a former SENCo. The categories aren't generic - they map to the things UK information governance teams actually flag, because Stuart AJ spent years writing the documents this tool now redacts.
Built locally by design. The detection engine, the OCR and the redaction all run on your device. We can't see your documents. Neither can anyone else.
We do not claim 100% recall. No PII detector reaches it, and ours doesn't either. The reviewer is part of the workflow on purpose.
Inkwell is built by Student Radar, a UK company based in Plymouth. Founded by Stuart AJ, formerly Assistant Head and SENCo.
Inkwell is the sister product to Student Radar.
Pilot access
Choose the installer for your device. Activation codes are issued separately for pilot schools.
For Macs with Apple Silicon chips, including M1, M2, M3 and newer.
Inkwell-0.1.13-arm64.dmg · 124 MB
For older Intel-based Macs.
Inkwell-0.1.13-x64.dmg · 129 MB
Windows installer for 64-bit Windows devices.
Inkwell-Setup-0.1.9-x64.exe · 151 MB
