Is Tampermonkey Safe?
Tampermonkey — Nerq Trust Score 61.8/100 (C+ grade). Score based on 2 independent trust signals. Last analyzed: 2026-04-12
Tampermonkey is a Chrome extension with a Nerq Trust Score of 61.8/100 (C+), based on 3 independent data dimensions. Last analyzed: 2026-04-12 Security: 90/100. Popularity: 90/100. Data sourced from Chrome Web Store metadata, permissions analysis, developer verification, and update history. Last updated: 2026-04-12. Machine-readable data (JSON).
Is Tampermonkey safe?
Trust Score Breakdown — Tampermonkey has a Nerq Trust Score of 61.8/100 (C+). Measured across 2 independent trust signals (as of 2026-04-12).
What is Tampermonkey's trust score?
Tampermonkey has a Nerq Trust Score of 61.8/100, earning a C+ grade. This score is based on 2 independently measured dimensions including security, maintenance, and community adoption.
What are the key security findings for Tampermonkey?
Tampermonkey's strongest signal is security at 90/100. No known vulnerabilities have been detected.
What is Tampermonkey and who maintains it?
| Author | Unknown |
| Category | Chrome Extensions |
| Source | N/A |
Tampermonkey Across Platforms
Same developer/company in other registries:
Similar Chrome by Trust Score
Safety Guide: Tampermonkey
What is Tampermonkey?
Tampermonkey is a Chrome extension — Userscript manager for custom JavaScript injection. Most popular userscript manager for Chrome..
How to Verify Safety
Review permissions carefully. 'Read all data on all websites' is high risk.
You can also check the trust score via API: GET /v1/preflight?target=Tampermonkey
Key Safety Concerns for Chrome extension
When evaluating any Chrome extension, watch for: excessive permissions, data harvesting, permission creep.
Measured Signals
Tampermonkey has a Nerq Trust Score of 62/100 (C+). This score is a composite of automated measurements of security, maintenance, community, and quality signals.
Key Takeaways
- Tampermonkey has a Trust Score of 62/100 (C+).
- The score is a measured composite — it is not a suitability judgment. Evaluate the individual signals against your own requirements.
- Query the current measured values via the Nerq API.
Detailed Score Analysis
| Dimension | Score |
|---|---|
| Security | 90/100 |
| Maintenance | 50/100 |
| Popularity | 90/100 |
| Quality | 40/100 |
| Community | 35/100 |
Based on 5 dimensions. Data from Chrome Web Store metadata, permissions analysis, developer verification, and update history.
What data does Tampermonkey collect?
Tampermonkey has a privacy score of 90/100. Review the documentation and privacy policy for data handling details.
Full analysis: Tampermonkey Privacy Report · Privacy review
Is Tampermonkey secure?
Security score: 90/100 (0-100, higher = fewer measured security issues).
Nerq monitors this entity against NVD, OSV.dev, and registry-specific vulnerability databases for ongoing security assessment.
Full analysis: Tampermonkey Security Report
Tampermonkey Across Platforms
Same developer/company in other registries:
How we calculated this score
Tampermonkey's trust score of 61.8/100 (C+) is computed from Chrome Web Store metadata, permissions analysis, developer verification, and update history. The score reflects 5 independent dimensions: security (90/100), maintenance (50/100), popularity (90/100), quality (40/100), community (35/100). Each dimension is weighted equally to produce the composite trust score.
Nerq analyzes over 7.5 million entities across 26 registries using the same methodology, enabling direct cross-entity comparison. Scores are updated continuously as new data becomes available.
Signals last measured on April 12, 2026. Data version: 1.0.
Full methodology documentation · Machine-readable data (JSON API)
Frequently Asked Questions
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Disclaimer: Nerq trust scores are automated measurements based on publicly available signals. They are not endorsements, verdicts, or guarantees of suitability. Always evaluate the signals against your own requirements.