PII redaction & anonymization for law firms
Lawyers handle exactly the data that must not leak: client identities, case details, financial and health information. PII Shield lets your firm anonymize documents locally before using AI or sharing them, and restore the originals afterwards — so privileged data never leaves the firm’s computer.
Where it helps
| Task | How PII Shield helps |
|---|---|
| Using ChatGPT / Claude on a matter | Anonymize the brief first, run the AI on placeholders, restore the names locally. |
| Disclosure & document production | Redact third-party personal data with a reviewed, consistent pass across the file. |
| Data-subject access requests | Remove other people’s personal data before releasing records. |
| Sharing drafts with counsel or clients | Strip sensitive identifiers from a working copy before it leaves the office. |
| Interview & call recordings | Bleep names and numbers from audio, locally, before sharing. |
Why on-device matters for confidentiality
Under the GDPR, client identifiers are personal data, and professional-secrecy duties sit on top of that. A cloud redaction service means handing privileged material to a third party. PII Shield keeps everything on the machine you already trust: there is no account, no upload, and no telemetry by default. You can read exactly what stays on your device on the Data & Privacy Practices page.
Human review, not blind automation
Detection combines an AI model with precise pattern rules, but every finding is shown for you to keep or redact. That keeps a lawyer in control of the result — which also means PII Shield is a tool to assist you, not a substitute for legal judgement.
Frequently asked questions
Only if client identifiers are removed first. PII Shield lets you anonymize a document locally, use an AI tool on the anonymized version, and restore the real values on your own machine — so privileged information never leaves your control.
No. Detection, anonymization and restore all run locally on Windows. Client documents and the personal data in them are never uploaded to us or any cloud service.
Yes. You can redact third-party personal data from documents before sharing, disclosure or a subject access response, with a quick human review of every item.
Word, PDF, Excel, email and plain text, plus audio recordings such as interviews and calls.
No. Automated detection is a strong first pass, but you review and confirm the output. PII Shield is a tool to help you, not legal advice.
Try it on a real matter
Free for 14 days on Windows 10 and 11. One-time license, no subscription.
Related: anonymize before ChatGPT · redact audio · local vs cloud redaction