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SRI hash generator
Create SHA-256, SHA-384 or SHA-512 SRI attributes locally for resources loaded from a CDN.
- 100% local
- Instant
- Free
- No account
- Works offline
- Clipboard
Source
Integrity value
HTML attributes
Complete HTML tag
Why use this tool?
Subresource Integrity lets browsers verify that a script or stylesheet downloaded from a CDN exactly matches the expected file. This tool computes the digest locally and prepares the required HTML attributes.
Smart processing
Generate or verify sensitive data with clear and immediate controls.
Supported formats
Strings, keys, hashes, and technical formats depending on the security function.
Save time
Get a clean, ready-to-use result in seconds without installing software or configuring a complex workflow.
Guide
How to use this tool
- 1
Add the resource
Paste file contents or select a JavaScript or CSS file from your device.
- 2
Choose the algorithm
SHA-384 is a common robust choice for external Web resources.
- 3
Copy the tag
Add the integrity and crossorigin attributes to your script or link tag.
Tips and best practices
- Regenerate the hash whenever the remote file changes.
- Ensure the CDN server supports CORS requests.
- Prefer SHA-384 or SHA-512 for new integrations.
Frequently asked questions
What is SRI for?
SRI prevents the browser from executing an external resource when its content does not match the expected digest.
Is the file uploaded?
No. Web Crypto calculates the digest directly in your browser.
Why add crossorigin?
SRI checks for cross-origin resources generally require a CORS-compatible request.
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