Data Converters

Upload an Excel file (.xlsx, .xls) and download it as CSV — free and private, nothing is uploaded to a server.

Upload a CSV file and download a real Excel (.xlsx) workbook — free, private, in your browser.

Convert tab-separated data (copied from Excel) into a clean JSON array of objects.

Upload an Excel file and download a JSON array of objects — keyed by the header row.

Generate a clean HTML <table> from CSV data, with the first row as headers.

Upload an Excel file and get an HTML table you can paste into any web page.

Convert CSV into a GitHub-flavored Markdown table for README files and docs.

Upload a JSON file (array of objects) and download a real Excel (.xlsx) spreadsheet.

Generate SQL INSERT statements from CSV data, ready to run against your database.

Extract a Markdown table back into clean CSV data.

Pull the data out of an HTML <table> and get clean CSV.

Convert a JSON object or array into well-formed, indented XML.

Convert JSON into clean, human-readable YAML for config files.

Generate TypeScript interfaces from a JSON sample — with nested types.

Turn a line-by-line list into a single comma-separated line (safely quoted).