Data Format Converter

Yes. Click the Upload File button or drag a file directly into the input area. Supported file extensions: .csv, .json, .xml, .yaml, .yml, .tsv, .xlsx, and .html. Excel files (.xlsx) are automatically parsed from binary format — no need to save as CSV first. Once uploaded, the content appears in the input field and conversion runs automatically.

Comma (,), semicolon (;), tab (\t), and pipe (|). When converting from CSV, select the delimiter that matches your file — European CSV exports often use semicolons. When converting to CSV, choose the delimiter your target system expects. The tool also handles quoted fields and embedded newlines in CSV values.

Upload an .xlsx file and the tool reads the first sheet automatically using a JavaScript XLSX parser running entirely in your browser. The first row is treated as column headers. Multiple sheets are not supported — if you need data from a non-first sheet, export that sheet as CSV first. XLSX files up to ~5MB work reliably; larger files may slow down due to browser memory constraints.

SQL output generates INSERT INTO statements for every row. The Table Name option (default: "data") sets the table name in the statement. Example: INSERT INTO data (name, age, city) VALUES ('Alice', 30, 'Paris'); — one statement per row. Column names are inferred from the first row of the source data. The output works with MySQL, PostgreSQL, SQLite and most other SQL databases.

Both represent the same data structures. JSON uses braces, quotes, and commas, making it compact but harder to read for humans. YAML uses indentation and no quotes on simple values, making it more readable for config files. YAML is a superset of JSON — all valid JSON is valid YAML. Use YAML for config files meant to be edited by hand; use JSON for API payloads, storage, and machine-to-machine communication.

No hard limit, but files under 10MB work smoothly since all processing happens in your browser. Very large files (50MB+) may cause the browser tab to run out of memory. For large datasets, consider splitting into smaller chunks or using a command-line tool like jq, csvkit, or xmlstarlet instead.

No. All conversion happens locally in your browser via JavaScript. Your data — even sensitive spreadsheets or database exports — never leaves your device and is not uploaded to any server.