Format, validate, and transform JSON with syntax highlighting and error detection.

Paste or type your JSON below. Use Ctrl+Z to undo and Ctrl+Shift+Z to redo.

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Validate JSON against JSON Schema drafts 2020-12 and 7 with detailed error reporting.

The validate button will only work if both JSON input and schema are valid.
JSON input

JSON Schema

Generate a JSON Schema from sample JSON data — infer structure, types, and required fields automatically.

JSON input

Generated Schema

Slice, filter, map and transform your JSON data using JQ.

The apply filter button will only work if the JSON input is valid.
JQ Quick Reference
Arrays .items[] .items[0] .items[-1] .items[1:3] .items | length [.items[] | .id]
Objects .key ."complex-key" keys del(.key) {a, b}
Piping & Filtering .items | .[0] .items[] | select(.id > 5) .items | map(.id) .items[] | .name . as $x | ...

Saved Filters

JQ Query

JSON input

Output

Convert JSON arrays to CSV format instantly—perfect for spreadsheets and data analysis. All processing is done in your browser — no data is sent to the server. Max file size: 25 MB.

JSON input
CSV output

Convert CSV data to JSON format—transform spreadsheets into structured JSON effortlessly. All processing is done in your browser — no data is sent to the server. Max file size: 25 MB.

CSV input
JSON output

Upload a CSV file and run SQL queries against it. All processing is done in your browser — no data is sent to the server. Max file size: 25 MB.

Click or drag & drop a CSV file here
— rows loaded

Press Shift+Enter to run

Results

Compare two text files and see the differences highlighted like git diff.

Original file
Modified file

Note: The editor allows using Ctrl-z for undoing and Ctrl-Shift-z for redoing!