Hash Calculator — Forensic-Grade File Integrity for Windows
Tamper-evident hashing, verification, and chain-of-custody reporting for digital evidence. Multi-algorithm, fully offline, and read-only on your evidence — by design.
Open beta — free download
Tamper-evident audit log
Snapshot & verify Self-integrity reports
Read-only on evidence
Dashboard & Defendability Score
Why Hash Calculator
Everything a forensic examiner, auditor, or IT-security team needs to prove a file has not changed — and to defend that proof in court.
Multi-Algorithm Hashing
MD5, SHA-1, SHA-256/384/512, SHA-3, BLAKE2b, BLAKE3 and RIPEMD-160 — computed in a single streaming pass.
Tamper-Evident Audit Log
Every action is hash-chained. Alter any past entry and every later one breaks — chain-of-custody that defends itself.
Snapshot & Verify
Capture a folder's state today; prove nothing has drifted months later — file by file, to the byte.
Self-Integrity Reports
HTML & PDF reports carry their own SHA-256 inside — change one character and the report flags itself as tampered.
Read-Only on Evidence
Hash Calculator never modifies the source media you examine — not a single byte. The first rule of digital forensics, by design.
Dashboard & Defendability Score
A court-readiness score across your cases, with KPI tiles and a one-click branded PDF export.
Other Tools by Innovativa
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How Hash Calculator Works
From evidence intake to a court-ready report — a clean four-step workflow, fully offline and read-only on your source media.
Add Evidence
Scan a folder or drive, drag-and-drop files, or stream very large sets to JSONL. Nothing on the source media is modified.
Hash
Compute multiple algorithms in a single streaming pass. Every action is written to the tamper-evident, hash-chained audit log.
Verify & Snapshot
Compare against expected hashes or a saved snapshot to prove nothing has drifted — file by file, to the byte.
Report
Export a branded, self-verifying HTML or PDF report with a Defendability Score for chain-of-custody.
Why Forensic Teams Trust Hash Calculator
Read-Only by Design
Hash Calculator never modifies, moves, or deletes a single byte of your source evidence — the first rule of digital forensics, enforced in the tool.
Tamper-Evident by Default
Every action is recorded in a hash-chained audit log. Alter any past entry and every later one breaks — proof that defends itself.
Modern Cryptography
19 algorithms — from MD5 and the SHA family to SHA-3, BLAKE2b, BLAKE3 and RIPEMD-160 — computed in a single streaming pass.
Fully Offline & Private
Runs entirely on your machine. No cloud, no telemetry — your case data, hashes, and logs never leave your computer.
Court-Ready Reporting
Branded, self-verifying HTML and PDF reports with a Defendability Score, built for chain-of-custody.
Built for evidence integrity, not vanity metrics
19
Hash algorithms (cryptographic + fast)
100%
Offline & read-only on your evidence
0
Bytes ever modified on your evidence
Free
During the open beta, for Windows
Frequently Asked Questions
Is Hash Calculator free?
Yes — it is free to download and use for Windows during the open beta. Multi-seat commercial licensing is available for forensic labs, audit teams, and government departments.
Do I need to install Java to run it?
No. The installer bundles a stripped-down OpenJDK runtime, so you do not need Java installed on your machine.
Does Hash Calculator modify my evidence files?
Never. It is read-only on your source media by design — it does not change, move, or delete a single byte. That is the first rule of digital forensics, enforced in the tool.
What makes the reports court-defensible?
Every action is recorded in a tamper-evident, hash-chained audit log, reports carry their own SHA-256 self-integrity hash, and a Defendability Score summarises chain-of-custody readiness.
Which hash algorithms are supported?
MD5, SHA-1, SHA-224/256/384/512, the SHA-3 family, BLAKE2b, BLAKE3, and RIPEMD-160 — computed in a single streaming pass.
Download Hash Calculator — Free for Windows
Forensic-grade file integrity, verification, and chain-of-custody reporting. No sign-up. Read-only on your evidence, by design.
Download Now