File Hash Generator (Keccak‑256 & SHA‑256)
Compute a cryptographic fingerprint of any file locally in your browser—no upload, no storage. Use Keccak‑256 for Ethereum-compatible hashing, or SHA‑256 for standard checksum workflows.
✓ Processed locally — never uploaded to any server
✓ Useful for integrity checks, comparisons, and verification
Note: Keccak-256 and SHA3-256 are different standards and will produce different outputs.
Need an automated workflow for making legal files tamper‑evident?
Lexkeep is a cloud-based legal document management system and case management platform built with a security-first approach to confidentiality and data integrity. It encrypts files and anchors their fingerprints on Ethereum for independently verifiable integrity and timing.
Note: This page only computes hashes. It does not anchor anything on blockchain by itself.
FAQ
What is a file hash?
A file hash is a cryptographic fingerprint of a file. If the file changes by even one byte, the hash changes, making tampering or corruption detectable.
Is my file uploaded to Lexkeep when I generate a hash here?
No. This tool computes hashes locally in your browser. Your file is not uploaded, stored, or transmitted to Lexkeep servers from this page.
What is Keccak‑256 used for?
Keccak‑256 is the hashing function commonly used in Ethereum contexts. It is useful when you want an Ethereum-compatible fingerprint for integrity verification and blockchain anchoring workflows.
Is Keccak‑256 the same as SHA3‑256?
They are closely related but not identical in all implementations. If you need Ethereum compatibility, Keccak‑256 is the correct choice.
When should I use SHA‑256 instead?
SHA‑256 is widely used for general file integrity checks, downloads verification, and security tooling. Use it when you need compatibility with common checksum workflows.
How does this relate to Lexkeep’s blockchain anchoring?
Lexkeep anchors cryptographic fingerprints of files on Ethereum to provide tamper-evident proof of integrity and timing. This tool helps you compute hashes for verification and comparison.