SRI Hash Generator is designed for the exact search intent behind “sri hash generator”. Generate a Subresource Integrity (SRI) value for a resource so compatible browsers can verify that the fetched bytes match the expected cryptographic digest. Generate a Subresource Integrity (SRI) value for a resource so compatible browsers can verify that the fetched bytes match the expected cryptographic digest. SRI syntax An integrity value combines an algorithm name with a Base64-encoded digest, for example sha384-... . Common SRI algorithms include SHA-256, SHA-384 and SHA-512. Exact bytes matter Any change to the resource changes its digest. When a CDN file or local asset is updated, regenerate the integrity value or the browser can reject the resource. CORS can matter Cross-origin SRI checks interact with CORS requirements. Test the final script or stylesheet URL in the deployment context where it will be loaded. Worked example: Generate the digest from the exact production file, then place the resulting `sha384-...` value in the element's integrity attribute. Common practical uses include Protect third-party static assets; Pin CDN script or stylesheet bytes; Generate integrity attributes for deployment; Verify release asset changes. Important limitations: SRI verifies content bytes, not whether the original resource is trustworthy. Every resource change requires a matching new digest. Cross-origin use can require correct CORS behavior. Key questions this page should answer include: What is an SRI hash? It is a cryptographic digest used by Subresource Integrity to let browsers verify fetched resource bytes. Which algorithms can SRI use? Common supported integrity algorithms include SHA-256, SHA-384 and SHA-512. Why did my script stop loading after an update? If the file bytes changed but the integrity value did not, the browser can reject the resource. Does SRI make a third-party script safe? No. It pins expected bytes; it does not prove those bytes are benign. Can I use SRI for cross-origin resources? Yes in supported cases, but cross-origin integrity checking interacts with CORS and should be tested in the actual deployment. The page should stay focused on this differentiator: Technical exactness: integrity syntax, byte-for-byte changes, and CORS behavior.
How to use this tool
SRI syntax
An integrity value combines an algorithm name with a Base64-encoded digest, for example sha384-.... Common SRI algorithms include SHA-256, SHA-384 and SHA-512.
Exact bytes matter
Any change to the resource changes its digest. When a CDN file or local asset is updated, regenerate the integrity value or the browser can reject the resource.
CORS can matter
Cross-origin SRI checks interact with CORS requirements. Test the final script or stylesheet URL in the deployment context where it will be loaded.
Examples
Integrity attribute concept
Generate the digest from the exact production file, then place the resulting `sha384-...` value in the element's integrity attribute.
Common use cases
- Protect third-party static assets
- Pin CDN script or stylesheet bytes
- Generate integrity attributes for deployment
- Verify release asset changes
Frequently asked questions
What is an SRI hash?
It is a cryptographic digest used by Subresource Integrity to let browsers verify fetched resource bytes.
Which algorithms can SRI use?
Common supported integrity algorithms include SHA-256, SHA-384 and SHA-512.
Why did my script stop loading after an update?
If the file bytes changed but the integrity value did not, the browser can reject the resource.
Does SRI make a third-party script safe?
No. It pins expected bytes; it does not prove those bytes are benign.
Can I use SRI for cross-origin resources?
Yes in supported cases, but cross-origin integrity checking interacts with CORS and should be tested in the actual deployment.