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Jacksum

Jacksum is a free, open source, cross-platform, feature-rich, multi-threaded command line tool for calculating hash values, verifying data integrity, finding files by their fingerprints, and finding algorithms to hash values. 489 hash functions!

Jacksum supports 489 algorithms, including the most common cryptographic and non-cryptographic hash functions. Jacksum also supports the "Rocksoft (tm) Model CRC Algorithm" to customize your CRC.

Jacksum can perform a verification of hashes against a set of known hashes, and it can detect matching, non-matching, missing, and new files.

Jacksum takes advantage of modern multi-processor/multi-core environments, and saves time by hashing multiple files in parallel, and by computing hashes with multiple algorithms in parallel.

Output can occur in predefined standard formats (BSD-, GNU/Linux-, or Solaris style, SFV or FCIV) or in a user-defined format which is highly customizable, including many encodings for representing hash values, including binary, decimal, octal, hexadecimal with lowercase or uppercase letters, Base16, Base32 with and without padding, Base32hex with and without padding, Base64 with and without padding, Base64url with and without padding, BubbleBabble, and z-base-32.

Input data can come from files, standard input stream (stdin), or provided directly by command line arguments.

Jacksum supports many charsets for reading and writing files properly, and it comes with full support for all common Unicode aware charsets such as UTF-8, UTF-16, UTF-16BE, UTF-16LE, UTF-32, UTF-32BE, UTF-32LE, GB18030, etc.

With Jacksum you can also find the algorithm used to calculate a checksum, CRC, hash or find files that match a given hash value.

Pricing:
  • Open Source
Platforms:
  • Windows
  • Linux
  • Mac OSX
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#OS & Utilities #Data Integrity #Command Line Tools

Jacksum Reviews and details

Screenshots and images

  • Jacksum Landing page
    Landing page //
    2023-04-08

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Questions & Answers

As answered by people managing Jacksum.

  1. What makes Jacksum unique?

    Jacksum (JAva ChecKSUM) is a free, open source, cross-platform, feature-rich, multi-threaded command line utility that makes hash functions available to you. It covers many types of use cases where hash values are needed:

    • Calculating of hash values of almost any input
    • Finding OK/failed/missing/new files (verify file/data integrity)
    • Finding files by their fingerprints for positive matching
    • Finding files that do not match certain fingerprints for negative matching
    • Finding all duplicates of a file by its hash value
    • Finding the algorithm(s) that generated a certain hash value

    In order to achieve the goals above Jacksum supports you with

    • 489 standard hash functions
    • Customizable CRCs from 1 to 64 bit width
    • 60+ options to control Jacksum's behavior on the command line
    • 14 standard encodings for representing hash values
    • 10 predefined styles for reading and writing files that contain hash values
    • 8600+ lines of manpage with descriptions, examples, and compatibility lists for the most common algorithms

    Jacksum is also a library. You can use it for your projects. It is written entirely in Java

  2. How would you describe your primary audience?

    Jacksum is for users with security in mind, advanced users, sysadmins, students of informatics, computer scientists, cybersecurity engineers, forensics engineers, penetration testers, white hat hackers, reverse engineers, CRC researchers, etc.

  3. Which are the primary technologies used for building your product?

    Java, a programming language for building robust cross platform software.

  4. Why should a person choose Jacksum over its competitors?

    It is free, open source, cross platform, multi-threaded, reliable, and it comes with a bunch of features, see also https://github.com/jonelo/jacksum/wiki/Features

  5. What's the story behind Jacksum?

    See also https://raw.githubusercontent.com/jonelo/jacksum/main/RELEASE-NOTES.txt

  6. Who are some of the biggest customers of Jacksum?

    See also https://github.com/jonelo/jacksum/wiki/References

Social recommendations and mentions

We have tracked the following product recommendations or mentions on various public social media platforms and blogs. They can help you see what people think about Jacksum and what they use it for.
  • Why are there no checksum apps for MacOS?
    Having said that I believe this is what you are looking for https://apps.apple.com/gr/app/hash-calculator-2/id463459213?mt=12 Or Https://github.com/sunjw/fhash/ Https://www.quickhash-gui.org Https://jacksum.net/en/index.html. Source: about 1 year ago

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This is an informative page about Jacksum. You can review and discuss the product here. The primary details have been verified within the last quarter. So they could be considered up to date. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.

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