Are UtiliTools really 100% free?

Yes, all 115+ tools on UtiliTools are completely free with no hidden costs, no premium plans, and no usage limits. The site is supported by non-intrusive advertising.

Do I need to create an account or sign up?

No, UtiliTools requires no sign-up, no email, and no account. Just open any tool and start using it immediately.

Are my files safe? Do you upload them to a server?

Your files are 100% safe. Almost all UtiliTools process files directly in your browser using JavaScript and WebAssembly. Your files never leave your device and are never uploaded to any server.

What tools are available on UtiliTools?

UtiliTools offers 115+ tools across 6 categories: PDF tools (convert, compress), Image tools (convert, compress, resize), Video tools (convert, extract audio), Text tools (case converter, diff, markdown), Developer tools (JSON formatter, Base64, hash generator, regex tester, and more), and Utilities (QR codes, unit converter, password generator, timer).

Does UtiliTools work on mobile devices?

Yes, UtiliTools is fully responsive and works on smartphones, tablets, and desktops. All tools are optimized for touch interfaces and smaller screens.

How is UtiliTools different from other online tool websites?

Unlike most online tool websites, UtiliTools processes your files directly in your browser — no uploads, no server processing, no waiting. This means faster results and complete privacy. Plus, there are no file size limits or daily usage caps.

Which hash algorithm should I use for SRI?

SHA-384 is the recommended algorithm for SRI. It provides a good balance between security and performance. SHA-256 and SHA-512 are also supported by browsers.

Do I need crossorigin="anonymous" with SRI?

Yes. When loading resources from a different origin (like a CDN), the crossorigin="anonymous" attribute is required for SRI to work. Without it, the browser will not check the integrity hash.

home/cybersecurity/sri-hash-generator

SRI Hash Generator

Generate Subresource Integrity hashes for your JavaScript and CSS files. Supports SHA-256, SHA-384 and SHA-512. Free, private, runs entirely in your browser.

Note: The remote server must allow CORS. If the fetch fails, paste the file content instead.

Tag type:

What is SRI?

Subresource Integrity (SRI) lets browsers verify that resources fetched from CDNs or third-party servers have not been tampered with. A cryptographic hash is included in the integrity attribute of script or link elements.

Why SHA-384?

SHA-384 is the recommended algorithm for SRI. It provides strong security while generating shorter hashes than SHA-512. All modern browsers support SHA-256, SHA-384, and SHA-512 for integrity checks.

CORS requirement

For SRI to work with cross-origin resources, you must include crossorigin="anonymous" on the element. Without it, the browser skips the integrity check entirely.

How to Use SRI Hash Generator

The Subresource Integrity (SRI) Hash Generator creates cryptographic hashes for external scripts and stylesheets so browsers can verify file integrity before execution. This protects your site against compromised CDNs and supply-chain attacks. Generate SHA-256, SHA-384, or SHA-512 hashes directly in your browser.

Open the SRI Hash Generator

Navigate to the SRI Hash Generator from the cybersecurity tools section. The tool provides a clean interface for generating integrity hashes for any external resource.

Provide the Resource

Enter the URL of the external script or stylesheet, or paste the file contents directly. The tool will fetch or process the content to compute the cryptographic hash.

Select the Hash Algorithm

Choose from SHA-256, SHA-384, or SHA-512. SHA-384 is the most commonly recommended for SRI and offers an excellent balance of security and compatibility.

Generate the Hash

Click the generate button to compute the base64-encoded hash. The tool outputs the full integrity attribute value ready for use in your HTML tags.

Copy the HTML Tag

Copy the complete script or link tag with the integrity and crossorigin attributes already included, ready to paste directly into your HTML document.

Common Use Cases

Securing CDN-Hosted Libraries

Add integrity hashes to all third-party JavaScript libraries loaded from public CDNs to ensure tampered files are blocked before execution.

Compliance with Security Policies

Meet organizational or regulatory requirements that mandate subresource integrity checks on all externally hosted resources.

Protecting Against Supply-Chain Attacks

Prevent compromised CDN or package registry resources from injecting malicious code into your website by enforcing hash verification.

Auditing Existing Websites

Generate hashes for resources already in use to verify they match expected content and add SRI attributes where they are missing.

Pro Tips

-Always include the crossorigin='anonymous' attribute alongside the integrity attribute, or the browser will skip the integrity check.
-Generate a new hash each time you update the version of an external library, as even minor changes will produce a completely different hash.
-Use SHA-384 as your default algorithm; it is recommended by the W3C specification and supported by all modern browsers.
-Combine SRI with Content Security Policy (CSP) headers for a defense-in-depth strategy against script injection attacks.
-Test your SRI implementation in a staging environment before deploying to production to avoid accidentally blocking legitimate resources.

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