Free browser-based data tool

JSON to CSV Converter

Convert JSON to CSV instantly. Everything stays in your browser.

Your files never leave your computer.All processing happens locally inside your browser.

Turn an array of objects into spreadsheet-ready rows
Flatten one object level and flag deeper structures
Preview, copy, or download UTF-8 CSV

1

Upload JSON

Choose a .json file containing an array of objects.

Drop a JSON file here

or use the file browser

2

Paste and validate JSON

Use an array of objects. Headers are generated from every object key.

JSON input

Paste a JSON array or upload a file to begin.

What JSON to CSV conversion is

Turn structured objects into rows and columns

JSON to CSV conversion transforms an array of similarly shaped objects into a table. Object keys become headers, each object becomes a row, and values become CSV cells that can be opened in spreadsheet and data-analysis software.

Common use cases

Move application data into familiar tabular tools

Convert an API response into a downloadable report
Prepare test fixtures for spreadsheet review
Turn exported records into an import-ready CSV
Share JSON data with nontechnical collaborators
Inspect inconsistent keys across a record collection
Move browser data into a local analysis workflow

Developer workflows

Bridge APIs and command-line output to CSV

Paste a JSON array from an API client, test run, or local script. UtilityDock validates the syntax, combines keys from every object, and quotes CSV fields safely. One-level nested objects use dot notation, while deeper values remain visible as JSON text with a warning.

Spreadsheet workflows

Open clean UTF-8 rows without manual mapping

The generated CSV uses a comma delimiter and standard field escaping. Missing properties become blank cells, null values become blank cells, and booleans and numbers remain readable values for spreadsheet review.

Examples

Object keys become a consistent header row

JSON input	CSV result
`[{"name":"Alice"},{"name":"Bob"}]`	`name\r\nAlice\r\nBob`
`[{"name":"Alice","active":true}]`	`name,active\r\nAlice,true`
`[{"address":{"city":"Paris"}}]`	`address.city\r\nParis`

Data Toolkit

Prepare JSON before conversion or continue with CSV

CSV ToolkitMerge, split, filter, inspect, and clean CSV files.JSON Formatter & ValidatorPretty print and validate JSON before conversion.JSON MinifierRemove unnecessary JSON whitespace.JSON Key SorterNormalize object-key order at every depth.

Future CSV to JSONConvert tabular CSV records back into JSON objects.Planned

FAQ

Questions about converting JSON to CSV

Does UtilityDock upload or store my JSON?

No. Your files never leave your computer. Validation, conversion, preview, copying, and download creation all happen locally inside your browser.

What JSON shape does the converter require?

Version 1 requires a non-empty array of objects. Each object becomes one CSV row, and the combined object keys become columns.

How are nested objects converted?

One object level is flattened with dot-notation headers such as address.city. Deeper objects and arrays are preserved as JSON text in a cell and reported as warnings.

What happens when an object is missing a key?

The corresponding CSV cell is left blank. Headers are generated from the union of keys found across every object.

Are commas, quotes, and line breaks escaped safely?

Yes. UtilityDock uses standard CSV quoting rules for commas, quotation marks, line breaks, and surrounding whitespace.