Software & Apps File Types What Is a CSI File? How to open, edit, and convert CSI files by Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated on February 18, 2020 Campbell Scientific Datalogger. Campbell Scientific File Types Design Cryptocurrency MS Office Windows Linux Google Drive Apps File Types Backup & Utilities View More Tweet Share Email A file with the CSI file extension is most likely an EdLog Program Data file; a custom data logging program built for Campbell Scientific dataloggers. The program code within the CSI file is compiled to make an EdLog Compiled Program with the .DLD file extension. ContentServ CS EMMS Suite uses the CSI extension too, but for ConentServ Include files. These are source code files that can contain variables and functions for other ContentServ projects to reference. If your CSI file isn't in either of the formats just mentioned, it may instead be a Challan Status Inquiry file, Cyberautograph Signed Item file, or Adobe Contribute Shared Settings file. Some CSI files are seen with Microsoft SharePoint as a temporary file that was created during a backup. CSI is also an abbreviation for Camera Serial Interface, Computer Security Institute, Common System Interface, Color Solutions International, and Construction Specification Institute. How to Open a CSI File If your CSI file refers to an EdLog Program Data file, it can be opened with Campbell Scientific's LoggerNet. ConentServ Include files that have the .CSI extension are opened with ContentServ's EMMS. A common question surrounding this file type is how to open a Challan Status Inquiry file from NSDL. The TaxCloudIndia website has step-by-step instructions on downloading the CSI file from NSDL. You can most likely open it with a text editor. Adobe Contribute, an HTML editor, uses the .CSI extension for configuration files. They store information on how the program should manage a website. They typically have an obscure file name and are stored in a folder called "_mm" in the root folder of the website. Microsoft SharePoint uses CSI files too. Other CSI files might be Cyberautograph Signed Item files, but we don't have any information on what they're used for or what program opens them. Other formats share some of the same letters as the CSI extension, so don't get them confused. Some examples include CSO, CGI, CSR, CSH, and CS (Visual C# Source Code) files. If you find that an application on your PC does try to open the CSI file but it's the wrong application or if you would rather have another installed program open CSI files, see How To Change the Default Program for a Specific File Extension guide for making that change in Windows. How to Convert a CSI File Since there are a number of possible formats for a CSI file to be in, we suggest you first open it in the program that it belongs to, and then, if possible, save the open file to another format. Generally, the conversion option is found in the program's File menu or through an Export button. However, of all the formats mentioned above, it's probably only the Challan Status Inquiry files that can be converted. If you're sharing the file with someone else or you have to convert it to a new format for a specific reason, it's probably best to choose something more common. Since the format is most likely text-based, you can probably convert the CSI to PDF or other text file formats compatible with Microsoft Excel or Word, like XLSX or DOCX. To do this, open the CSI file in a text editor and then save it to a basic text format that MS Word and Excel are able to open, like TXT. To get that TXT file in the PDF format, you can use FileZigZag.