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Preview of Blekline

Blekline by thewall_

Protect prompts before send with real-time PII masking and policy controls. Blekline helps protect sensitive data in prompts before it leaves your browser. 🛸

Some features may require paymentSome features may require payment
Available on Firefox for Android™Available on Firefox for Android™
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Extension Metadata

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Stop accidental AI data leaks before prompts leave your browser.Blekline masks sensitive entities before prompts are sent.Review masked prompts and security activity.AI adoption with enterprise-grade security guardrails. Keep a consistent protection layer across tools your team already uses.
About this extension
Teams move quickly with AI tools, but one pasted secret, customer identifier, or internal detail can create security and compliance risk. Blekline adds a real-time protection layer by intercepting prompt sends, masking sensitive entities, and applying workspace policy controls before transmission.

Blekline Shield helps teams keep productivity high while reducing accidental data leakage in day-to-day AI use.

What Blekline Shield does
- Masks sensitive context before prompt send
- Applies workspace-level policy controls (strict mode, keyword rules)
- Supports secure prompt workflows across major AI platforms
- Connects extension activity with Blekline webapp security controls
- Helps teams operationalize AI usage with safer defaults

Use Blekline to
- Reduce accidental sharing of names, emails, IDs, keys, and other sensitive data
- Enforce prompt safety policies at the point of use
- Keep consistent protection across tools your team already uses
- Reduce manual prompt sanitization overhead for engineering, operations, and security teams

Who this is for
- Engineering teams handling internal code and secrets
- Revenue and operations teams working with customer/account context
- Security and compliance stakeholders who need stronger AI usage controls
- Marketing teams handling IP and client-sensitive information

How to get started
1. Install Blekline Shield
2. Create your Blekline account: https://app.blekline.com/auth/signup
3. Sign in to the extension and link your workspace
4. Enable Shield and apply policy settings
5. Prompt as usual with pre-send protection

Sign in: https://app.blekline.com/auth/signin

Website: https://blekline.com

Privacy Policy: https://blekline.com/privacy

Terms: https://blekline.com/terms
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Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for chatgpt.com
  • Access your data for chat.openai.com
  • Access your data for claude.ai
  • Access your data for gemini.google.com
  • Access your data for www.perplexity.ai
  • Access your data for perplexity.ai
  • Access your data for grok.com
  • Access your data for poe.com
  • Access your data for www.poe.com
  • Access your data for deepseek.com
  • Access your data for www.deepseek.com
  • Access your data for blekline.com
  • Access your data for app.blekline.com

Required data collection, according to the developer:

  • Authentication information
  • Website content
Learn more
More information
Add-on Links
  • Homepage
  • Support site
  • Support Email
Version
0.1.1
Size
84.16 KB
Last updated
3 days ago (Apr 20, 2026)
Related Categories
  • Privacy & Security
  • Social & Communication
License
All Rights Reserved
Privacy Policy
Read the privacy policy for this add-on
Version History
  • See all versions
Tags
  • anti malware
  • anti tracker
  • chat
  • content blocker
  • google
  • privacy
  • search
  • security
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