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PromptFence
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Chrome extension for AI-era data leaks

Stop secrets before they enter ChatGPT, Claude, Gmail, or a CRM.

PromptFence is a local-first browser guardrail. It catches API keys, passwords, tokens, credit cards, emails, and phone numbers in text fields, then redacts them before anything leaves the browser.

Download Chrome ZIP Open demo page
0server calls needed for detection
1 clickredact risky fields
$6-12per-seat team pricing target

Paste text to scan locally

Use fake data for testing. The real extension runs inside normal text fields across the browser.

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Risk score

Ready to scan

The scanner runs in this page. The extension performs the same checks directly inside text boxes.

Safe text preview appears here.

Tomorrow-morning validation path

1. Install

Download the ZIP, unzip it, open Chrome extensions, enable Developer Mode, and load `extensions/prompt-fence` or the unzipped folder.

2. Test

Open the demo page, paste the fake secret sample, and click in the field. PromptFence should show a warning panel.

3. Redact

Click Redact field. The risky values turn into placeholders before the text can be submitted.

Why this is easier to monetize

It has no overseas account dependency, no copyright gray area, and no marketplace data integration. Buyers understand the risk because every company is now telling employees to use AI while worrying about secrets and customer data.

Individual

For consultants and power users.

$9/mo

Team

Shared policies and audit counts.

$6/seat/mo

Agency

Client-safe prompts and policy packs.

$49/mo