Security & Authentication Tools

SHA-256 Hash Generator

Instantly generate a SHA-256 hash of any text, right in your browser.

Enter text below to instantly generate its SHA-256 hash - entirely in your browser using the Web Crypto API, nothing is sent to our servers.

Enter text

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JustChecker builds tools that respect your data - this one never leaves your browser.

What Is SHA-256?

SHA-256 is a cryptographic hash function that turns any input into a fixed 64-character hexadecimal value. The same input always gives the same hash, and a tiny change gives a completely different one. This tool hashes text in your browser.

When to Use It

To create or compare checksums.
When testing API request signing or webhooks that use SHA-256.

How to Use It

Enter the text.
Copy the resulting hash.

Understanding the Result

Hashes are one-way - you cannot turn a hash back into the text. Whitespace and line endings matter, so trailing spaces change the result.

Limitations

Plain SHA-256 is too fast for storing passwords. Use a slow password hash such as bcrypt or Argon2id - see the Bcrypt Hash Generator.

Frequently Asked Questions

No - this tool uses your browser's built-in Web Crypto API. Nothing you type is transmitted anywhere.

SHA-256 is a cryptographic hash function widely used for password storage (with proper salting), data integrity verification, digital signatures, and blockchain technology.

No - SHA-256 is a one-way function. There's no way to mathematically reverse a hash back into its original input, which is exactly why it's used for security purposes.