How Hash Generator Works
The tool passes your text through crypto.subtle.digest(), the Web Crypto API's built-in hashing function, which runs the selected algorithm entirely in your browser. A hash is a one-way fingerprint — the same input always produces the same hash, but the original text can't be recovered from the hash alone.
How to Use This Tool
- Type or paste the text you want to hash.
- Choose an algorithm — SHA-256 is the most common general-purpose choice.
- Select Generate Hash, then copy the result.
Example
The text ToolWorld hashed with SHA-256 produces de68d621... — a fixed-length string that changes completely if even a single character of the input changes.
Helpful Tips
- SHA-256 is a good general default — it's widely used for checksums, digital signatures and verifying file integrity.
- SHA-1 is included for compatibility with older systems, but it's considered cryptographically weak and shouldn't be used for security-sensitive purposes.
- Hashing the same text always produces the same result, which makes hashes useful for quickly checking whether two pieces of text are identical without comparing them directly.
Frequently Asked Questions
Can I reverse a hash back into the original text?
No, hashing is a one-way process by design — there's no way to recover the original input from its hash alone.
Is this suitable for hashing passwords?
For storing user passwords, a purpose-built algorithm like bcrypt or Argon2 (which are intentionally slow to resist brute-force attacks) is more appropriate than a general-purpose hash like SHA-256.
Is my text uploaded anywhere?
No, hashing happens entirely in your browser using the Web Crypto API.
This tool runs entirely in your browser. Your input is not uploaded to any server.