HashCalc Pro

Support · Privacy policy · Last updated: April 16, 2026

HashCalc Pro is a native macOS utility that computes multiple hashes and checksums in a single pass, helps you verify digests against saved values, and can optionally check supported results with VirusTotal - without sending whole files off your machine for the core workflow.

Pick the algorithms you care about, run them together, and see everything in one place. Large inputs are read incrementally with progress feedback so the app stays responsive on long jobs.

Who it is for

HashCalc Pro is aimed at anyone who lives next to checksums and digests - not only power users at the shell.

Developers and build engineers - Compare artifacts against published SHA-256 or SHA-512 values, batch several algorithms in one run before you cut a release, and copy hex in the exact format your docs, CI logs, or package scripts expect.
Cybersecurity and IT teams - Turn a suspicious or unknown file into MD5, SHA-1, and SHA-256 quickly for ticket notes or correlation, optionally follow with a VirusTotal lookup by hash without uploading the file through HashCalc, and keep sidecar .hash records for repeatable verification later.
Anyone validating downloads or archives - Confirm that an installer, disk image, or backup still matches a known-good digest, including very large files thanks to incremental reads and progress feedback.

What you can do

Hash files, plain text, or hex byte strings from one workflow.
Calculate many digests at once instead of juggling separate tools or command-line invocations.
Verify current results against expected values or saved metadata.
Copy results quickly and search the result grid by algorithm or hash value.
Use HMAC with a key you supply, with optional storage in the macOS Keychain.
Optionally query VirusTotal using MD5, SHA-1, or SHA-256 from the current run when you add an API key.

Algorithms

HashCalc Pro supports 48 algorithms, including MD and SHA families, SHA-3 and Keccak, RIPEMD, Tiger, BLAKE2 and BLAKE3, CRC and Adler-32, xxHash and XXH3, Murmur3, FNV, Jenkins one-at-a-time, Whirlpool, Panama, and GOST-94 variants - so release checksums, security reviews, and odd legacy formats can live in one app.

Output and formatting

Results are shown in hexadecimal with flexible layout: uppercase or lowercase, plain hex, colon-separated bytes, C-style literals, or custom prefixes and separators when you need to match a spec or paste into code.

Sidecar files and verification

For file hashing, you can save results as a sidecar .hash file (JSON) next to the source. Open a saved file later to compare against new runs, or save manually when you archive a release. When a matching sidecar already exists, the app can prompt you to verify against stored values instead of only recalculating - handy for integrity checks and download validation.

VirusTotal

With a personal API key, you can query VirusTotal from MD5, SHA-1, and SHA-256 results on demand. Optional behavior includes automatic lookup after calculation, detection alerts, and settings that respect public versus premium API rate limits - so quick triage stays inside your normal workflow.

Inside the app

Main - hashing, verification, and result exploration.
Theme - appearance, accent color, and monospace font tuning.
Options - behavior, .hash handling, verification prompts, status timing, and VirusTotal settings.
Stats - cumulative run counts and timing-oriented summaries.
Credits - acknowledgments for bundled components and services.

Requirements

Requires macOS 15 or later. Feature availability may vary by OS version.

Availability

HashCalc Pro is distributed on the Mac App Store. For help or feedback, visit support.