📊 Convertisseur JSON vers CSV en Ligne

Convert JSON arrays to CSV spreadsheet format online. Handles nested values, quoted fields, and special characters. Free, instant, no signup.

Paste a JSON array of objects and switch to JSON → CSV mode. Each key becomes a column header, each object becomes a row. Download the result or copy to clipboard. Table preview shows your data before you export.

Input (CSV)

Output (JSON)

How to Use

Choose direction

Select CSV → JSON to convert a spreadsheet to data, or JSON → CSV to export JSON as a table.

Paste your data

Paste CSV (with header row) or valid JSON array into the input area. The table preview updates live.

Copy or download

Click Copy or Download to save the output. Use the table preview to verify your data looks correct.

Frequently Asked Questions

How does CSV to JSON conversion work? +

The first row of the CSV becomes the keys of each JSON object. Each subsequent row becomes one object in the JSON array. Values are trimmed of whitespace. Numbers and booleans are kept as strings unless you enable type inference.

How are commas inside values handled? +

Values containing commas must be enclosed in double quotes in CSV format: "New York, NY". This tool correctly parses quoted fields including escaped double quotes (two consecutive double quotes represent one literal quote).

Can I convert nested JSON to CSV? +

JSON→CSV works with flat arrays of objects. Nested objects are serialized as JSON strings within their cell. For deeply nested structures, flatten your JSON first using the JSON Formatter tool.

What does the table preview show? +

After conversion, a table preview renders the data as an HTML table so you can visually inspect rows and columns before downloading. This helps catch misaligned columns or parsing errors.

Is there a file size limit? +

There is no hard limit, but processing very large files (over 5MB) in the browser may be slow. Everything runs client-side — your data never leaves your device.

Guide : Convertisseur CSV ↔ JSON

Qu'est-ce que c'est ?

Le Convertisseur CSV/JSON transforme les données tabulaires CSV en tableaux JSON et vice versa, avec détection automatique du délimiteur et gestion des en-têtes.

Utile pour préparer des données pour les API REST, importer/exporter des bases de données et traiter les exports de tableurs.

Comment utiliser

Collez votre CSV ou JSON dans la zone d'entrée.
Sélectionnez la direction de conversion (CSV→JSON ou JSON→CSV).
Configurez le délimiteur (virgule, point-virgule, tabulation).
Copiez ou téléchargez le résultat converti.

Conseils professionnels

Vérifiez que les valeurs contenant des virgules sont bien entre guillemets dans le CSV.
Utilisez UTF-8 BOM pour les CSVs destinés à Excel afin d'éviter les problèmes d'encodage.