Free SRI Checker & Validator
Verify and generate SRI hashes for external scripts and stylesheets to protect against CDN compromises. Free, fast, and works entirely in your browser with no sign-up required.
SRI Verification
Frequently Asked Questions
What is the Subresource Integrity Checker?
The Subresource Integrity Checker is a free online tool that verifies and generates SRI hashes for external scripts and stylesheets to protect against CDN compromises.
Is the Subresource Integrity Checker free?
Yes, it is completely free with no registration required. All verification happens client-side in your browser.
How does SRI protect my website?
SRI lets browsers verify that external resources have not been modified. If a CDN-hosted script is tampered with, the browser will refuse to execute it.
Is my data safe with this tool?
Absolutely. The SRI Checker & Validator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.
Does the SRI Checker & Validator work on mobile devices?
Yes, the SRI Checker & Validator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the SRI Checker & Validator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the SRI Checker & Validator?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The SRI Checker & Validator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About Free SRI Checker & Validator
Free SRI Checker & Validator is a free, browser-based tool in our Security Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.