Free JSON & JSONL Viewer Online

Open JSON and JSONL/NDJSON files in your browser. Explore nested data, filter, sort, and run SQL queries. No upload required.

Everything You Need for JSON Files

JSON and JSONL support

Open .json, .jsonl, and .ndjson files. DuckDB auto-detects the structure and flattens nested objects.

Table view

See your JSON data as a sortable, filterable table with column statistics and histograms.

SQL queries

Run SQL on JSON data. Filter, aggregate, and transform with full DuckDB SQL syntax.

Export to CSV

Convert JSON to CSV with one click. Apply transforms before exporting.

Large file support

Handle JSONL files with millions of lines. DuckDB WASM processes them efficiently in your browser.

100% private

Your JSON data never leaves your browser. No upload, no server, no tracking.

How It Works

1

Drop your .json

Drag a JSON file onto the page.

2

Explore instantly

Browse columns, view statistics, filter and sort.

3

Transform and export

Apply operations, build pipelines, export as CSV.

Frequently Asked Questions

How do I view a large JSON file?

Go to exploremydata.com/app and drag your .json or .jsonl file onto the page. DuckDB WASM handles large files efficiently.

Can I convert JSON to CSV?

Yes. Open your JSON file, optionally apply filters, then click Export to download as CSV.

Does it support JSONL/NDJSON?

Yes. ExploreMyData supports .jsonl and .ndjson (newline-delimited JSON) files natively.

Is my data uploaded?

No. All processing happens in your browser using DuckDB WASM. Your data stays on your device.

Ready to explore your JSON data?

No sign-up, no upload, no tracking. Just open your file and go.

Start Exploring, It's Free