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HeaderLint

HeaderLint

ID: ljdlfmmjplmbgknpialhldkpbkegpfcg

Extension Info & Metadata

Status
Active
Version
0.5.1
Size
0.06 MB
Rating
0.0/5
Reviews
0
Users
0
Type
Extension
Updated
Mar 27, 2026
Category
Developer tools
Price
Free
Featured
No
Visibility
Listed
Mature
No
By Google
No
Trusted
No
Download CRX
Chrome Web Store
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Publisher Contextual Analysis

Author
KookabearView Profile
Privacy
Privacy Policy
MX records exist
Yes
Domain exists
Yes
Is disposable
No
Is role-based
No
Mailbox exists
Yes
Total Extensions
3
Active
3
Obsolete
0
Listed
1
Unlisted
2
Total Users
3

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Screenshot 1

HTTP security header scanner with A-F grading

HeaderLint analyzes HTTP security headers on the current browser tab and provides an A-F letter grade with per-header findings and copy-paste remediation guidance. Because it runs inside your existing browser session, HeaderLint can scan pages behind login — no credentials or proxy setup required. Headers analyzed: - Content-Security-Policy (CSP) - Strict-Transport-Security (HSTS) - Referrer-Policy - X-Content-Type-Options - Permissions-Policy - X-Frame-Options - X-XSS-Protection Each header is scored as Correct (100), Weak (50), or Missing (0). The overall score is a weighted sum across all seven headers, mapped to a letter grade (A through F). For every finding, HeaderLint shows: - A severity badge (Pass / Weak / Missing) - A plain-language explanation of the issue - A recommended header value you can copy directly into your server config - A link to MDN documentation Click "Copy JSON" to export the full analysis as structured JSON for reporting or automation. Supports light and dark mode based on your system preference.

Extracted Data

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URLs
8
IPv4
0
IPv6
0

URLs

View the external URLs this extension communicates with to understand its network activity and data interactions.

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developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policyhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Securityhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security
developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Optionshttps://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options
developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Optionshttps://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-XSS-Protectionhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-XSS-Protection
developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policyhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Permissions-Policyhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Permissions-Policy
github.com/TheThirdSwitch/HeaderLinthttps://github.com/TheThirdSwitch/HeaderLint

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Version History

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