Hash Generator
Generate MD5, SHA-1, SHA-256, and other hash values.
About Hash Generator
Cryptographic hash functions convert data into fixed-size hash values. Common uses include data integrity verification, password storage, and digital signatures.
What Is This Tool?
Our hash generator computes MD5, SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes from any text input. Hashing is a one-way process — the same input always produces the same hash, but the original text cannot be recovered from the hash. All processing happens locally in your browser using the Web Crypto API.
How to Use
- Type or paste your text into the input field.
- Select the hash algorithm (MD5, SHA-1, SHA-256, SHA-384, or SHA-512).
- The hash value updates instantly as you type.
- Click the copy icon to copy the hash to your clipboard.
Common Use Cases
- Verifying file integrity by comparing hash values before and after a transfer
- Generating checksums for software releases
- Understanding how different hash algorithms produce different outputs
- Learning cryptography concepts in a hands-on way
Tips & Tricks
- SHA-256 and SHA-512 are recommended for security purposes; MD5 and SHA-1 are considered weak.
- Even a single character change produces a completely different hash — this is by design.
- Use this tool for learning and verification only; never store user passwords as MD5 or SHA-1 hashes.
Frequently Asked Questions
Can I convert a hash back into the original text?
No. Hashing is a one-way function by design — there's no algorithm to reverse a hash into its input. You can only compare a new hash against a known one to verify a match.
Which hash algorithm should I use to verify file integrity?
SHA-256 is the most common choice for checksums today and is what most software distributors publish. MD5 is still seen for legacy compatibility but shouldn't be relied on for security.
Why do MD5 and SHA-1 produce shorter output than SHA-256?
Each algorithm produces a fixed-length digest — MD5 outputs 128 bits, SHA-1 outputs 160 bits, and SHA-256 outputs 256 bits — regardless of how long the input text is.
Is it safe to use this tool to check a password against a known hash?
It's fine for learning or verifying non-sensitive data, but real authentication systems use salted, purpose-built password hashing algorithms like bcrypt or Argon2 rather than raw SHA-256 or MD5.
Is the text I hash sent to a server?
No. Hashes are computed locally using your browser's built-in Web Crypto API — your input text never leaves your device.
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hash values online. Free cryptographic hash calculator for text and data integrity verification.
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