Excel to JSON Converter
Convert XLSX files to JSON arrays of objects. Uses first row as keys, supports multiple sheets, JSONL output, and nested grouping. Pure JS — no SheetJS dependency.
About Excel to JSON Converter
Convert XLSX files to JSON arrays of objects. Uses first row as keys, supports multiple sheets, JSONL output, and nested grouping. Pure JS — no SheetJS dependency. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.
FAQ
How does the conversion work?
The first row of each sheet is used as JSON keys. Each subsequent row becomes a JSON object with those keys. Cell types (number, date, boolean, string) are preserved.
Can I convert multiple sheets?
Yes — select which sheet to convert, or convert all sheets into a single JSON object with sheet names as top-level keys.
What is JSONL output?
JSONL (JSON Lines) outputs one JSON object per line, which is useful for streaming parsers and log processing. Each line is a complete JSON object.
What extra features does this tool have?
10 extras: drag-drop, batch convert, sheet selector, custom key naming (camelCase/snake_case/original), nested JSON grouping, stats, preview, JSONL output, history, shareable URL.
Is my file uploaded?
No — all parsing is in-browser. The XLSX file never leaves your device.
Do I need SheetJS?
No — we parse XLSX (Office Open XML) directly using a pure-JS ZIP reader and XML parser. Zero external dependencies.
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