SHA-1 and SHA-256 Hash Generator
Compute SHA-1 and SHA-256 checksums from any text input. Hashes act as fingerprints for data, letting you verify integrity or match content without revealing what the content is.
How to use the Hash Generator
- Type or paste the text you want to fingerprint.
- The SHA-1 and SHA-256 digests are computed instantly as you type.
- Compare a digest against a known value to confirm the text matches.
- Copy either hash for documentation, tickets, or records.
When the Hash Generator is useful
- Verifying that shared content, like a configuration snippet, matches the original.
- Generating identifiers for deduplication, since identical text yields identical hashes.
- Recording integrity fingerprints for documents in a processing log.
- Checking what a known hash corresponds to by hashing candidate texts.
How the Hash Generator works
Hashing uses the browser's native Web Crypto API, which provides certified cryptographic implementations of SHA-1 and SHA-256 rather than hand-rolled JavaScript. The output is a fixed-length hexadecimal digest: 40 characters for SHA-1 and 64 for SHA-256. Because hashing runs locally, you can fingerprint sensitive text without exposing it, and nothing is transmitted anywhere.
Limits to keep in mind
SHA-1 is considered collision-prone for security purposes; prefer SHA-256 when the hash protects anything important. This tool hashes text you type, not files.
Frequently asked questions
Can a hash be reversed to reveal the original text?
No. Hashes are one-way functions; identical input produces the same digest, but the digest cannot be turned back into text.
Which algorithm should I use?
SHA-256 for anything security-relevant; SHA-1 remains common for legacy checksums.
Does the tool store what I hash?
No. Digests are computed in your browser and nothing is logged or sent.
Last reviewed: October 2026.