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Learn about Spreadsheet Files and APIs to open and create Spreadsheet files

A spreadsheet file contains data in the form of rows and columns. A spreadsheet file can be saved in several different file formats, each having a different file extension for unique representation. Data is stored in cells either in plain form such as text string, numbers, date, currency, etc. or as formulas that change a cell’s value when referenced cell values change.

Common spreadsheet file extensions and their file formats include XLSX (Microsoft Excel Open XML Spreadsheet), ODS (OpenDocument Spreadsheet) and XLS (Microsoft Excel Binary File Format).

Got queries related to Spreadsheet file formats? Head on to our community forums to benefit from the knowledge shared by File Format experts.

Open Source APIs to with Spreadsheet Files

Check the list of Open Source APIs to work with Spreadsheet files.

List of Spreadsheet File Extensions and Associated File Formats

Following is a list of common spreadsheet file formats along with their file extensions.

  • Download SpreadsheetsDownload free sample spreadsheet files in XLSX, XLSM, and ODS formats. Get spreadsheets with tables, formulas, and data validation, including dummy and blank Excel files.
  • CHIPLearn about CHIP file format and APIs that can create and open CHIP files.
  • PRESTOLearn about PRESTO format and APIs that can create and open PRESTO files.
  • GSHEETLearn about GSHEET file format and APIs that can create and open GSHEET files.
  • QPWLearn about QPW file format and APIs that can create and open QPW files.
  • WQ2Learn about WQ2 file format and APIs that can create and open WQ2 files.
  • CTSLearn about CTS file format and APIs that can create and open CTS files.
  • _XLSYour file format guide to know what is an _XLS file and APIs that can create and open _XLS files.
  • 12MYour file format guide to know what is a Lotus 123 12M file and APIs that can create and open 12M file.
  • GNMWhat is a GNM file and APIs that can create and open GNM files.
  • GNUMERICWhat is a GNUMERIC file and APIs that can create and open .gnumeric files.
  • XLSMHTMLLearn about what is an XLSMHTML file and APIs that can create and open and create XLSMHTML files
  • XLTHTMLYour file format guide to know what is an XLT file and APIs that can create and open them.
  • XLLearn about what is an XL file and APIs that can create and open XL files.
  • MARLearn about MAR file format and APIs that can create and open MAR files.
  • DFGYour file format guide to know what is a DFG file and APIs that can create and open DFG files.
  • XARLearn about XAR file format and APIs that can create and open XAR files.
  • NUMBERSFile format knowledge about Numbers file and APIs that can create, open and convert Numbers to XLSX or other spreadsheets.
  • NUMBERS-TEFFile format knowledge about Numbers-TEF file and APIs that can create and open them.
  • ASTLearn about AST Spreadsheet file and APIs that can create and open AST files.
  • AWSWhat is an AWS file and APIs that can create and open AWS files.
  • BKSLearn about BKS Spreadsheet file and APIs that can create and open BKS files.
  • CELLLearn about CELL Spreadsheet file and APIs that can create and open CELL files.
  • DEFLearn about what is a DEF file and APIs that can create and open DEF files.
  • DEXLearn about DEX Spreadsheet file and APIs that can create and open DEX files.
  • EFULearn about EFU file format and APIs that can create and open EFU files.
  • ESSLearn about what is an ESS file and APIs that can create and open ESS files.
  • FCSWhat is an FCS file and APIs that can create and open FCS files.
  • FMWhat is an FM file and APIs that can create and open FM files.
  • FPLearn about FileMaker Pro FP file format and APIs that can create and open FP files.
  • IMPLearn about Lotus IMP Spreadsheet file and APIs that can create and open IMP files.
  • PMDLearn about PlanMaker PMD file and APIs that can create and open PMD files.
  • PMDXLearn about PlanMaker PMDX file and APIs that can create and open PMDX files.
  • SDCLearn about SDC file format and APIs that can create and open SDC files.
  • STCLearn about what is an STC file and APIs that can create and open STC files.
  • SXCLearn about SXC file format and APIs that can create and open SXC files.
  • TMVLearn about TMV file format and APIs that can create and open TMV files.
  • TMVTLearn about TMVT file format and APIs that can create and open TMVT files.
  • FODSLearn about FODS file format and APIs that can create and open FODS files.
  • PMVXLearn about PMVX file format and APIs that can create and open PMVX files.
  • XLALearn about what is an XLA file format and APIs that can create and open XLA files.
  • 123Your file format guide to know what is a Lotus 123 file and APIs that can create and open 123 file.
  • NBLearn about what is an NB file APIs that can create and open NB files.
  • OTSLearn about OTS file format and APIs that can create and open OTS files.
  • XLRLearn about what is an XLR file APIs that can create and open XLR files.
  • XLSYour file format guide to know what is an XLS file and APIs that can create and open them.
  • _XLSXYour file format guide to know what is an _XLSX file and APIs that can create and open _XLSX files.
  • CSVCSV files store data as text separated by commas that can be easily imported into spreadsheet programs like Excel for organized table viewing and editing.
  • DIFYour file format guide to know what is a DIF file extension and APIs that can create and open DIF files.
  • DISWhat is a DIS file and APIs that can create and open DIS file.
  • ODSYour file format guide to know what is an ODS file and APIs that can create and open them.
  • TSVYour file format guide to know what is a TSV file extension and APIs that can create and open them.
  • XLAMLearn about XLAM file format and APIs that can create and open XLAM files.
  • XLMYour file format guide to know what is an XLM Macros file and APIs that can create and open XLM files.
  • XLSBAn XLSB file is a Microsoft Excel binary workbook that stores data in a binary format instead of XML, offering faster performance and smaller file sizes—ideal for large spreadsheets.
  • XLSMXLSM files are macro-enabled spreadsheets based on the Open XML format. Learn how to open them using Excel, Google Sheets, or other free tools.
  • XLSXLearn about what is an XLSX file and APIs that can create and open XLSX files.
  • XLTYour file format guide to know what is an XLT file and APIs that can create and open them.
  • XLTMYour file format guide to know what is an XLTM file and APIs that can create and open them.
  • XLTXYour file format guide to know what is an XLTX file and APIs that can create and open them.