Hash Generator Online — Create SHA-256 and SHA Hashes
Use this hash generator online to create SHA-1, SHA-256, SHA-384 or SHA-512 digests from UTF-8 text locally with the Web Crypto API.
About this tool
This online hash generator converts UTF-8 text into a deterministic hexadecimal SHA digest using your browser Web Crypto API. Hashes are useful for integrity checks and development workflows, but an unsalted fast hash is not suitable for storing passwords.
How to use
- Enter or paste the text whose digest you need.
- Choose the required SHA algorithm.
- Generate the hash, then copy the hexadecimal result to your comparison or development workflow.
Features
- Supports SHA-1, SHA-256, SHA-384 and SHA-512.
- Uses the native browser Web Crypto API.
- Processes the input locally without uploading it.
Common use cases
- Compare text with an expected checksum.
- Create stable fingerprints for test data.
- Verify that two text payloads are byte-for-byte identical.
Common issues and tips
- Hashes are sensitive to every byte, including spaces, capitalization and line endings.
- SHA-1 is retained for compatibility but should not be chosen for security-sensitive new systems.
Privacy
Hash generation runs locally in your browser. The text you enter is not uploaded to Tools12345.
Frequently asked questions
Can a SHA hash be reversed?
A cryptographic hash is designed to be one-way. Weak or predictable inputs can still be guessed and compared against the hash.
Which SHA algorithm should I choose?
SHA-256 is a common default for modern integrity checks. Use another option only when a protocol or existing system requires it.
Can I use this for password storage?
No. Password storage should use a dedicated salted, slow password hashing method such as Argon2, scrypt or bcrypt.