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Generate file checksums

The Windows programs sha1sum.exe, sha256sum.exe, md5sum.exe and crc32sum.exe are freeware command-line programs that generate or verify SHA-1, SHA-256, MD5 and CRC-32 checksums for a file or list of files.

For example, to compute the SHA-1 checksum (i.e. digest value) of the file abc.txt:

>sha1sum abc.txt
a9993e364706816aba3e25717850c26c9cd0d89d *abc.txt

Note that the default mode is binary. Use the -t option for text mode. For help, use the -h option and see the readme file included with the download.

2017-03-11: If you want the result in base64 encoding - for example to include as a <DigestValue> in an XML-DSIG document, use our digestvalue.exe instead.

More examples

>md5sum *.txt
25f9e794323b453885f5181f1b624d0b *123-9.txt
900150983cd24fb0d6963f7d28e17f72 *abc.txt
5eb63bbbe01eeed093cb22bb8f5acdc3 *hello.txt
a0f2a3c1dcd5b1cac71bf0c03f2ff1bd *hellon.txt

>md5sum hellon.txt
a0f2a3c1dcd5b1cac71bf0c03f2ff1bd *hellon.txt

>md5sum -t hellon.txt
6f5902ac237024bdd0c176cb93063dc4  hellon.txt

>crc32sum *.txt
cbf43926 *123-9.txt
352441c2 *abc.txt
0d4a1185 *hello.txt
38e6c41a *hellon.txt

>sha1sum *.txt
f7c3bc1d808e04732adf679965ccc34ca7ae3441 *123-9.txt
a9993e364706816aba3e25717850c26c9cd0d89d *abc.txt
2aae6c35c94fcfb415dbe95f408b9ce91ee846ed *hello.txt
88a5b867c3d110207786e66523cd1e4a484da697 *hellon.txt

>sha256sum *.txt
15e2b0d3c33891ebb0f1ef609ec419420c20e320ce94c65fbc8c3312448eb225 *123-9.txt
ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad *abc.txt
b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9 *hello.txt
572a95fee9c0f320030789e4883707affe12482fbb1ea04b3ea8267c87a890fb *hellon.txt


  1. Binaries: digsum-1.0.1.zip (196 kB) [sha1=c932edf575bb5a420e8b0747a65074ecfd52e638]. All programs recompiled and digitally signed 2015-10-16.


To install, just copy the EXE files to a folder on your Windows PATH, for example C:\Windows. You may need administrator permissions to copy the file. We recommend you set up a C:\Bin directory for files like this.

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This page last updated 3 November 2023.