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Code 39 (also known as Alpha39, Code 3 of 9, Code 3/9, Type 39, USS Code 39, or USD-3) is a variable length, discrete barcode symbology.
The Barcode generator tool lets you create a Code39 Barcode signatures that you can download and use to sign business contracts and official XLSX documents. Any Code39 Barcode contains unique textual information that confirms the identity of the signer or authorizes the business document. Barcode verification can be performed automatically by reading the signature content. The signatures content may vary depending on the Barcode or QR Code types. For example, barcodes allow to keep about 10-15 characters. The GroupDocs Generator tool allows you to generate electronic signatures from any browser for free without registration. GroupDocs will be happy to help you with the electronic signature generation and their usage on your documents.
XLSX is well-known format for Microsoft Excel documents that was introduced by Microsoft with the release of Microsoft Office 2007. Based on structure organized according to the Open Packaging Conventions as outlined in Part 2 of the OOXML standard ECMA-376, the new format is a zip package that contains a number of XML files. The underlying structure and files can be examined by simply unzipping the .xlsx file.
ReadMoreYou can also sign other file formats. Please see the list below.