Data file commonly used with Web forms
ATT is a file extension for a data file commonly used with web forms. Web form data is output to a file called POSTDATA.ATT. ATT files contain binary data, organized similarly to a Comma Separated Value (CSV) file. ATT files can be opened by a text editor or Post Data Spider. ATT files can also be imported into an Excel spreadsheet using the Import Wizard.
Learn more about .ATT files:
Visit the Post Data Spider web page.
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