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At a glance
HashCalc (by SlavaSoft) is a free Windows utility that generates hash values, checksums, and HMACs to verify file integrity after downloads or transfers. It’s useful for casual users and professionals who need dependable verification, offering a range of widely used cryptographic algorithms and working entirely offline.
Supported algorithms
- SHA-256
- SHA-1
- MD5
- MD2
- CRC32
How it processes data
HashCalc runs in two principal modes — a regular hash/checksum mode and an HMAC mode — so it can be used for basic integrity checks or keyed message authentication. You can provide input in several forms:
- Hexadecimal strings
- Plain text strings
- Files (single items or larger datasets)
All calculations occur locally, so no internet access is required.
Interface and performance
The program’s design is simple and somewhat old-fashioned, but it remains lightweight and easy to use. Typical workflow:
- Pick the file or paste the data to be checked
- Choose one or more algorithms to calculate
- View the resulting hash or HMAC
Small files are processed almost instantly; larger files take longer depending on your system’s resources. The app does not include built-in batch automation or a modernized UI, but its straightforward operation makes it reliable for routine checksum tasks.
Privacy and reliability
Because HashCalc works offline and hashes raw file data without altering content, it’s suitable for privacy-conscious users and for verifying downloads without exposing data to external servers. Development updates are infrequent, yet the tool continues to perform consistently for document, archive, and media file verification.
Who will benefit
HashCalc is a practical choice for anyone who values accuracy and simplicity over a flashy interface or advanced workflow features. It’s well suited for quick verification jobs, occasional integrity checks, and use by users who prefer a no-frills, trustworthy hashing utility.
Technical
- Windows
- Free