How do I use the NexTools Subresource Integrity (SRI) Hash Generator - SHA-384 / SHA-512?

Simply open the Subresource Integrity (SRI) Hash Generator - SHA-384 / SHA-512 on NexTools, enter your values or parameters in the input fields, and get instant, accurate results directly in your web browser.

Is the Subresource Integrity (SRI) Hash Generator - SHA-384 / SHA-512 tool completely free to use?

Yes, Subresource Integrity (SRI) Hash Generator - SHA-384 / SHA-512 on NexTools is 100% free with unlimited usage, zero subscriptions, and no registration or API keys required.

Does NexTools store my data when using Subresource Integrity (SRI) Hash Generator - SHA-384 / SHA-512?

No. All calculations and operations are processed securely within your browser session or secure server requests. We never store or share your input data.

Can I use Subresource Integrity (SRI) Hash Generator - SHA-384 / SHA-512 on mobile devices?

Yes, Subresource Integrity (SRI) Hash Generator - SHA-384 / SHA-512 is fully responsive and optimized to work seamlessly across mobile phones, tablets, and desktop computers.

What is Subresource Integrity (SRI)?

Subresource Integrity (SRI) is a W3C security specification that enables web browsers to verify that resources fetched from Content Delivery Networks (CDNs) or third-party servers have not been tampered with or modified by malicious attackers.

Why is SHA-384 recommended for SRI?

The W3C SRI specification specifically recommends SHA-384 because it provides an optimal balance between collision resistance, 64-bit CPU performance, and compact base64 digest length.

Why is crossorigin='anonymous' required when using SRI?

SRI requires Cross-Origin Resource Sharing (CORS) validation so the browser can read the byte content to compute the hash. Without crossorigin='anonymous', cross-origin scripts cannot be validated and will be blocked.

Subresource Integrity (SRI) Hash Generator

Generate W3C Subresource Integrity hashes and secure HTML tags for CDN JavaScript and CSS files in your browser.

CDN Script or Stylesheet URL

The remote server must support CORS (Access-Control-Allow-Origin: *), as standard CDNs like cdnjs, jsDelivr, unpkg, and Google Hosted Libraries do.

Select Cryptographic Hash Algorithm

SHA-384 (W3C Recommended) SHA-512 SHA-256

Integrity Attribute Value

HTML <script> / <link> Tag

What is W3C Subresource Integrity (SRI)?

When websites include scripts or styles from public CDNs like <script src="https://cdn.../lib.js">, they introduce a supply chain attack vector. If the CDN account or DNS is compromised, attackers could inject malicious cryptocurrency miners or credential stealers into millions of visitor sessions.

Subresource Integrity (SRI) mitigates this risk by providing a cryptographic digest inside the integrity="..." attribute. The browser computes the digest of the incoming asset and refuses to execute the script if a single character has been modified.

Frequently Asked Questions

What happens if a CDN script updates without changing the SRI hash?

The browser will trigger an SRI mismatch error and block the script from executing. Always pin CDN URLs to exact, immutable version numbers (e.g. @5.3.0) rather than rolling tags like @latest.

Can I specify multiple hashes for redundancy?

Yes, the integrity attribute accepts space-separated hashes (e.g. integrity="sha384-... sha256-..."). The browser will validate using the strongest algorithm it supports.