FastHasher is a free tool for hashing your files faster than ever!

The ideal tool for hashing all the iso images and files you've downloaded in a blink of an eye.

It's compatible with Windows XP, Vista, 7, 8, 8.1 and 10 in 32 & 64 bits.

Windows Server 2003, 2008, 2012 and 2016 are supported.

Requirements: To have Microsoft .NET Framework 3.5 or higher installed.

Prefer the portable version? You can get it here: FastHasher Portable.


Important, If you experience slowness on context menu hashing, then either:

  • Add the application to exclusions in your Windows SmartScreen Filter (or turn off completely);
  • Check if your Antivirus is not slowing things down (and add to exclusions too);
  • Install all the updates for your Windows OS and current .NET Framework.



  • Drag & Drop file selection
  • FileDialog file selection
  • "One file at a time" software
  • Windows Explorer Context Menu (only available in installable version)
  • Parallel hashing with different three algorithms at a time
  • Hash Algorithms: MD5, SHA1, SHA256, SHA384 and SHA512
  • Comparison field with auto removal on paste of the characters ' ', ':' and '-'.
  • Buffer settings and other performance settings
  • Autoload and save of the buffer and performance settings
  • Check for file rights before computing
  • Option to save results to .txt
  • Resource friendly and highly optimized
  • DPI aware intuitive GUI with a separate thread
  • Double buffered application
  • Multithreaded Application
  • Wide compatibility
  • No limitation for file size (can work with files bigger than 4 GB)
  • The executable file of the installable version is only 569 KB
  • The setup file size is only 4.24 MB
  • Administrator privileges are not required for execution
  • This tool is written in C#
  • Developed by Tony Karavasilev (Тони Каравасилев)
  • Free!


Performance tips:

  • Use the default settings for best results;
  • You can skip MD5 or SHA1 to lower CPU load on slower machines;
  • Different SHA2 hash algorithms may be faster to compute on newer machines;
  • Lower your buffer size for older machines with slow CPUs or slow disks;
  • For SSD and/or newer CPUs you can change your buffer size to 8MB;
  • Donations and e-mails always make all the problems go away;
  • Keep your disk's filesystem clean of errors to avoid problems at all levels and costs;
  • The Drag & Drop feature needs the Windows OS integrity to be clean and the .NET Framework to be intact;
  • If it is still not enough, then add the application to exclusions in your Windows SmartScreen and Antivirus.


Need more advanced cryptography featues? See TNTCrypter.


Downloads 3,927
Weekly downloads 43
Publisher Tony Karavasilev
By tonypl6
Created on 14 November 2015
Last update 19 November 2016
Category Encryption
Operating system Windows

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