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SHA-1 Generator

Calculate SHA-1 hashes of text, files or decoded bytes for legacy use in your browser — free, with no sign-up, and your input never leaves your device. Enter text, select a file or decode bytes, then copy the digest or compare it with an expected SHA-1 value.

Input source

Empty input is valid. Spaces and Unicode are preserved; no BOM is added.

Hash algorithms
Other algorithms

1 / 8 selected

SHA-2
SHA-3
Keccak
BLAKE
SHAKE
Compatibility
Checksums
More settings

Results

Choose Calculate to get a hash of your input.

Compare with expected

Enter an expected value to compare.

Text, files, keys and hashes stay in this tab. Nothing you enter is uploaded or saved.

Questions

How long is the result?

SHA-1 produces 20 bytes: 40 hexadecimal characters. Base64 represents the same digest bytes. MD5 and SHA-1 are available for legacy compatibility; they are unsuitable for modern cryptographic integrity protection.

What input is hashed?

Input source: Text / Files / Encoded bytes. Empty input is valid. Spaces and Unicode are preserved; no BOM is added. Text encoding: UTF-8, UTF-16LE, UTF-16BE; Line endings: LF / CRLF. Any file type is accepted. The original bytes are hashed, not extracted document text or the filename. Files are processed one at a time in 1 MiB chunks.

How does verification work?

Select the expected algorithm and encoding explicitly. Comparison uses decoded bytes and checks the exact length. Changing output format or expected value does not reread a file.

Are my inputs saved or uploaded?

Text, files, keys and hashes stay in this tab. Nothing you enter is uploaded or saved.

Is this tool free?

Yes. This tool is free, with no sign-up and no daily limits.

Do I need an account?

No. You can use this tool without an account.

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