Cryptographic Hash Generator - SHA-256, SHA-512, SHA-384 & SHA-1 Checksums
Compute FIPS 180-4 compliant SHA-256, SHA-384, SHA-512, and SHA-1 hexadecimal message digests locally in your browser using the hardware-accelerated WebCrypto API.
This tool processes your input on your device.
Developer tools
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How to use it
Follow these steps in the workspace above.
- Type or paste your text, payload, or checksum string into the input box.
- Select your hashing algorithm (SHA-256 is recommended for modern integrity checks) or view all digests simultaneously.
- Copy the lowercase or uppercase hexadecimal digest with a single click.
How it works
A cryptographic hash function maps arbitrary-length input into a fixed-length bit string (message digest) with two critical properties: it is deterministic (the exact same input always produces the exact same hash) and one-way / collision-resistant (changing a single bit of input flips roughly 50% of the output bits via the avalanche effect). Our Online Hash Generator runs directly on your browser native SubtleCrypto engine so strings never cross the network.
Choosing the Right Hash Algorithm (NIST FIPS 180-4)
- SHA-256 (256-bit / 64 hex chars): The industry standard used in TLS certificates, Subresource Integrity (SRI) tags, Git commit objects, and API authentication signatures.
- SHA-512 & SHA-384 (512-bit / 128 hex chars): Provides a 256-bit collision resistance margin and runs exceptionally fast on 64-bit processors.
- SHA-1 (160-bit / 40 hex chars): Supported for verifying legacy file checksums.
Need to generate high-entropy passwords or unique database keys instead? Try our Password Generator and UUID v4 Generator.
