Free, privacy-first Excel to JSON converter. Transform .xlsx files to JSON format directly in your browser. No uploads, no servers, no sign-up.
Drop modern .xlsx files or legacy .xls files. Both formats are parsed locally in your browser without needing Excel installed.
Your Excel file stays on your device. No data is sent to any server. Everything runs locally in your browser using DuckDB WASM.
Each spreadsheet row becomes one JSON object per line. NDJSON is easy to stream, grep, and import into databases, APIs, and data pipelines.
Filter rows, rename columns, aggregate data, or add calculated fields. Shape your spreadsheet data before converting it to JSON.
No sign-up, no trial, no watermarks. Convert as many Excel files to JSON as you need, completely free.
Once loaded, ExploreMyData works without an internet connection. Convert Excel to JSON even on a plane.
Drag a .xlsx or .xls file onto the page. It loads instantly.
Filter rows, select columns, or rename fields before export.
Click Export, choose JSON, and download your NDJSON file.
Open exploremydata.com/app, drag your .xlsx or .xls file onto the page, then click Export and choose JSON. Each row becomes a JSON object, output as newline-delimited JSON (NDJSON).
ExploreMyData reads the first sheet of your Excel file by default. This keeps the conversion straightforward and the JSON output clean.
ExploreMyData outputs newline-delimited JSON (NDJSON), where each line is a standalone JSON object representing one row. This format is easy to stream, grep, and import into databases.
Yes. You can filter rows, select specific columns, rename fields, aggregate data, and apply 32+ transformations before exporting. Only the data you need ends up in the JSON output.
No sign-up, no upload, no tracking. Just drop your file and export.
Convert Excel to JSON Free