PromptShielder automatically masks names, emails, and financial data in the browser before it hits ChatGPT or Claude. 100% local. Zero server logs. Built for your compliance program.
3 free prompts included. No signup necessary.
Draft a reply to Sarah Chen (sarah@acme.com) about invoice #4471...
Draft a reply to [NAME_1] ([EMAIL_1]) about invoice [ID_1]...
In US v. Heppner (S.D.N.Y., Feb 2026), documents created using a public AI platform were held NOT protected by attorney-client privilege. Firms are scrambling to write realistic AI policies. Banning AI doesn't work — associates use personal ChatGPT anyway. PromptShielder lets your team use AI without client data ever leaving their browser.
Every day, your account managers, analysts, and developers copy-paste sensitive client data, internal financial metrics, and raw emails into public LLMs to speed up their workflow. The moment that data is sent to external servers, you lose control over it forever.
Uploading proprietary client intellectual property to third-party models.
Violating strict CCPA, GDPR, and HIPAA data privacy regulations.
Public AI models training on your company's private financial data or legal strategies.
Our frictionless 3-step loop keeps your workflow fast and your data invisible to AI providers.
Paste your raw text into PromptShielder. Our algorithm instantly detects and replaces names, addresses, emails, and identifiers with secure tokens.
[NAME_1]Copy the sanitized text and safely paste it into ChatGPT, Claude, or any public AI model. Run your prompts with absolute peace of mind.
[EMAIL_1]Take the AI's response and paste it back into PromptShielder. Our local browser dictionary immediately swaps the tokens back to your original, real data.
→ real dataUnlike traditional software, PromptShielder has no backend database. We don't store your text, because we physically cannot see it.
Read the full security architectureAll regex extraction and token mapping happen entirely inside your local browser memory.
Because no data is transmitted to our servers, PromptShielder is designed to simplify corporate security, IT compliance, and legal reviews.
No complex software installations, no corporate VPN conflicts. Just open the tab and work securely.
"Our associates were pasting matter details into ChatGPT to draft summaries. PromptShielder let us keep the productivity without the privilege risk."
Managing Partner
Boutique litigation firm
"During tax season, my staff will do whatever is fastest. This runs in the browser, so client returns never leave the machine. That's the only story my WISP can defend."
Firm Partner
Regional CPA practice
"Before our next SEC exam, I needed a defensible answer for how advisors use AI. PromptShielder gave me one page I could hand to the examiner."
Chief Compliance Officer
Independent RIA
Select the tier that fits your team's operational scale. All plans include 100% client-side privacy guarantees.
Designed for independent freelancers and solo operators.
or $59 one-time