. The crossorigin=\"anonymous\" attribute is required for cross-origin resources. Generate the hash using this tool, then copy the complete tag."}},{"@type":"Question","name":"Why is the crossorigin attribute required with SRI?","acceptedAnswer":{"@type":"Answer","text":"The crossorigin attribute enables CORS (Cross-Origin Resource Sharing) mode, which is necessary for the browser to access the raw bytes of cross-origin resources for hash verification. Without it, browsers cannot compute the hash to compare against the integrity attribute. Use \"anonymous\" for public CDN resources."}},{"@type":"Question","name":"Can I use SRI with inline scripts?","acceptedAnswer":{"@type":"Answer","text":"No, SRI only works with external resources loaded via src (scripts) or href (stylesheets). Inline scripts cannot have integrity attributes because the hash would need to be computed from the content itself, creating a circular dependency. For inline script security, use Content Security Policy (CSP) instead."}},{"@type":"Question","name":"What happens if the SRI hash does not match?","acceptedAnswer":{"@type":"Answer","text":"When the hash mismatch occurs, the browser blocks the resource from loading and logs a security error to the console. Your page will function as if the script/stylesheet was not included. This is the intended behavior - it prevents execution of potentially malicious modified code."}}]}
Home/Tools/SRI Hash Generator

SRI Hash Generator

Generate Subresource Integrity hashes for external scripts and stylesheets. Protect your site against CDN compromises and supply chain attacks.

Privacy & Security

All hash generation is performed locally in your browser using the Web Crypto API. Your data never leaves your device.

Enter the URL of a JavaScript or CSS file hosted on a CDN or external server.

Options

Need Help Securing Your Web Applications?

Our security team can help implement SRI, CSP, and other web security controls to protect your applications.

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Frequently Asked Questions

Common questions about the SRI Hash Generator

Subresource Integrity is a W3C security feature that lets browsers verify files fetched from CDNs or external sources. By including a cryptographic hash in your script/link tags, browsers can detect if the file was modified and refuse to execute compromised code. SRI protects against CDN compromises, man-in-the-middle attacks, and supply chain attacks.

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⚠️ Security Notice

This tool is provided for educational and authorized security testing purposes only. Always ensure you have proper authorization before testing any systems or networks you do not own. Unauthorized access or security testing may be illegal in your jurisdiction. All processing happens client-side in your browser - no data is sent to our servers.

SRI Hash Generator - Free Online Tool | Inventive HQ