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SlavaSoft FastCRC Library
FastCRC Library 1.51     Free To Try

A highly optimized implementation of the most popular CRC algorithms.

The library allows Windows developers to perform checksum calculations for memory blocks, strings, blobs, streaming data and files in their applications.

FastCRC Library was designed to be fast, flexible and extremely easy to use.

Version: 1.51

File Size: 272KB

OS: Windows 95/98/Me/NT/2000/XP

Free Trial Limitation:

The trial version of FastCRC Library will cause a 10 second delay when running any application that uses it.

Online Help     F.A.Q.     Related Links     License Agreement     Samples     Order     Download

Major Features:

  • Support of

    • 3 checksum algorithms: CRC16, CRC16C (CRC-CCITT), CRC32.

  • Support of 3 interfaces:

    • FastCRC API (The FastCRC API can be used as is, or it can be used to create wrappers for other languages that use DLLs).

    • C++ Interface (C++ wrapper classes to FastCRC API).

    • FastCRC Type Library (Includes all declarations for accessing the FastCRC Library from different programming languages which have the possibility to reference a Type Library, such as VB 5.0, VB 6.0, VBA, etc.)

  • Support for

    • Static Linking

    • Dynamic Linking

  • No external dependencies such as MFC DLLs, COM/DCOM or other resources.

  • Excellent documentation (MFC-style help).


The fastcrc.zip file that you download contains the following files:

FastCRC.h - include file
FastCRCS.lib - LIB file for static linking to FastCRC Library
FastCRC.lib - LIB file for dynamic linking to FastCRC Library
FastCRC.dll - DLL file
FastCRC.tlb - Type Library for FastCRC.dll
FastCRC.chm - HTML help file for FastCRC Library
ReadMe.txt - brief FastCRC Library description
Register.exe - registration program for SlavaSoft products


Some samples are listed in the table below.  More samples can be found in FastCRC Library's help file (FastCRC.chm).

Online Help:

Source 1 (with frames, includes search by index and by word)

Source 2 (no frames)

Recommended web browser: Microsoft Internet Explorer

  Copyright SlavaSoft Inc. All rights reserved.