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Hash & Checksum Tools

Calculate and verify hashes, checksums, password formats, and SFV manifests locally.

10 of 10 tools

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Text Hash Calculator

Hash exact text or encoded bytes with modern and legacy digest algorithms, and optionally compare a known digest.

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Random Hash Test-Data Generator

Create securely random, digest-shaped test fixtures in selected algorithm lengths without implying a known original message.

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File Hash Calculator & Verifier

Calculate digests from exact binary file bytes locally, with bounded batches and optional single-file verification.

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Checksum Calculator

Calculate named CRC profiles or Adler-32 from exact text or encoded bytes and compare an expected checksum.

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Bcrypt Tools

Generate, verify, or inspect bcrypt strings locally, with bounded real-computation fixture generation.

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Legacy Password Hash Tools

Compute precisely identified obsolete NTLM and legacy database password formats for compatibility work.

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Nested Hash Calculator

Hash a digest again with explicit inner and outer algorithms and an explicit intermediate representation.

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Random Hex Generator

Generate bounded hexadecimal values with secure browser randomness, including exact odd character lengths.

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SFV File Creator

Create an interoperable UTF-8 SFV manifest from local files using CRC-32/ISO-HDLC.

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SFV Verifier

Verify selected local files against an SFV manifest and report every match, mismatch, missing, duplicate, malformed, and unused entry.

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