PromptGuard
Real-time firewall that detects and blocks prompt injection attacks before they reach OpenAI, Anthropic, or any LLM API.
As of June 2026, PromptGuard has — users in the Productivity category.
Usersno change0%
—
—
Ratingno change0%
—
— reviews
Reviewsno change0%
—
Version
0.2.0
Manifest V3
History
1 snapshotsTracking since May 23, 2026.
Not enough history yet for this metric — the chart fills in as we collect more snapshots.
View as table
| Date | Users | Rating | Reviews | Version |
|---|---|---|---|---|
| May 23, 2026 | — | — | — | 0.2.0 |
| Now | — | — | — | 0.2.0 |
Permissions & access
- Permissions
- storagenotifications
- Host access
- https://api.openai.com/*, https://api.anthropic.com/*, https://*/*
Screenshots
About
PromptGuard is a browser-layer security extension that protects your AI-powered workflows from prompt injection attacks.
HOW IT WORKS:
1. L1 Pattern Engine (<1ms): Checks against 188+ patterns in 10 languages. Injections blocked instantly.
2. L2 Semantic Analysis (≤400ms): DeBERTa ML model confirms suspicious prompts.
3. L3 GPT Fallback: GPT-4o-mini handles edge cases.
WHAT IT PROTECTS AGAINST:
• Instruction override ("ignore all previous instructions")
• Persona hijacking ("you are now DAN")
• Data exfiltration attempts
• Jailbreak templates (DAN, AIM, STAN)
• Multilingual attacks (Turkish, German, Spanish, Russian, and more)
PERFORMANCE (546 labeled samples):
• Precision: 98.3%
• Recall: 87.2%
• F1 Score: 92.4%
PRIVACY:
• Only flagged prompts are transmitted — normal requests never leave your browser
• No personal data or browsing history collected
• Full source code: github.com/ahmetai-cell/promptguardTechnical
- Version
- 0.2.0
- Manifest
- V3
- Size
- 26.38KiB
- Min Chrome
- 88
- Languages
- 1
- Featured
- No
Metadata
- ID
- oecdkojnbkcojhadloicfbgominplnod
- Developer ID
- u8f86fbd5f9932c02abffa880afc054ec
- Developer Email
- [email protected]
- Created
- May 22, 2026
- Last Updated (Store)
- May 22, 2026
- Last Scraped
- Jun 11, 2026
- Website
- —
Data sourced from the Chrome Web Store · last verified Jun 11, 2026.