CSP Lab

Develop Content Security Policies (CSP) for your website

As of May 2026, CSP Lab has 92 users in the Developer Tools category.

Wes Bustraan Developer Tools

Chrome Web Store ↗.crx

Users+3.4%

92

92

Rating0%

—

— reviews

Reviews0%

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Version

0.1

Manifest V3

History

2 snapshots

Tracking since Apr 29, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 29, 2026	89	—	—	0.1
May 25, 2026	88	—	—	0.1
Now	92	—	—	0.1

Permissions & access

Permissions: declarativeNetRequestWithHostAccesswebNavigationwebRequeststorage
Host access: <all_urls>

Screenshots

CSP Lab screenshot 1

CSP Lab screenshot 2

CSP Lab screenshot 3

CSP Lab screenshot 4

About

CSP Lab is designed to help you develop a Content Security Policy for your website. 

It appears as a tab in the DevTools and it has three modes:

1. In "Existing" mode, it will evaluate the Content Security Policies on the sites that you visit
2. In "Suggest" mode, it will add replace any existing CSP header with a Report-Only header designed to send reports to a service that you run locally. This service will provide you with a CSP that will cover all the reported violations. This mode makes it easy to generate a starter CSP for a website that has never had one before.
3. In "Override" mode, you can specify a CSP that will add a CSP to a site that has none, or replace the one that is there. This mode is designed for testing and tweaking your CSP before you actually deploy it to your site.

Technical

Version: 0.1
Manifest: V3
Size: 364KiB
Min Chrome: 88
Languages: 1
Featured: No

Metadata

ID: ighgkhcdphdocpmjijmdkopnpjbaikkd
Developer ID: u7ab2e01018bdd385580bd43dd735c785
Developer Email: [email protected]
Created: Nov 25, 2024
Last Updated (Store): Nov 25, 2024
Last Scraped: May 25, 2026
Website: —
Support URL: https://github.com/w8wjb/csp-lab/issues
Privacy Policy: https://github.com/w8wjb/csp-lab/blob/main/PRIVACY.md

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Detects Content Security Policy violations in real-time with actionable fix hints.

CSP Evaluator is a tool that allows developers to check if a Content Security Policy (CSP) serves as mitigation against XSS attacks.

IntegSec CSP Tester

View and test Content Security Policy headers on any website. Decode existing CSPs or inject your own for testing.

Content Security Policy (CSP) Helper

Determine the safest Content Security Policy for the current web page.

Disable Content-Security-Policy

Disable Content-Security-Policy for web application testing. When the icon is colored, CSP headers are disabled.

Data sourced from the Chrome Web Store · last verified May 25, 2026.