Convertisseur JSON en CSV (Téléchargement Excel Gratuit)
JSON → CSV Converter
Transform your JSON into a downloadable CSV, compatible with Excel, Google Sheets and LibreOffice.
JSON Input
Conversion Options
Enter JSON to see the output.
Guide & Explanations
JSON to CSV Converter: The Spreadsheet-Compatible Solution
JSON is ubiquitous in web development — REST APIs, database exports, configurations... But most business teams need data in Excel or Google Sheets. Our JSON to CSV Converter bridges this gap in seconds, with no installation, no account required.
The Recursive Flattening Algorithm
This is the feature that distinguishes a basic converter from a professional tool. JSON can be deeply nested:
{"user": {"address": {"city": "New York", "zip": "10001"}}}A flat CSV cannot represent this hierarchy. Our Flattening algorithm solves this recursively: it descends into each nested object and builds a composite key using dot notation. So address.city and address.zip become two distinct, aligned columns in your spreadsheet.
Internal JSON arrays (e.g., ["tag1", "tag2"]) are automatically joined into a string (tag1 | tag2) to maintain a one-row-per-entry structure.
Schema Analysis: No Data Lost
Our engine scans the entire dataset before generating headers. If your first JSON object doesn't have the notes key, but the 50th one does, that column will still be created for all objects, with an empty cell for those that don't have it.
UTF-8 BOM: The Excel Windows Fix
The "UTF-8 BOM" option is enabled by default. This invisible marker (\uFEFF) at the start of the file is the signal recognized by Microsoft Excel (Windows) to correctly interpret accented characters and non-Latin alphabets. Without it, your data appears as gibberish. Disable it if importing into Unix/Linux systems.
Frequently Asked Questions
Q: Is Convertisseur JSON en CSV (Téléchargement Excel Gratuit) free to use?
R: Yes, the Convertisseur JSON en CSV (Téléchargement Excel Gratuit) utility is 100% free. All tools on Dolf.in are accessible at no cost and without intrusive ads.
Q: Is my data secure?
R: Absolutely. Dolf.in uses a 'Serverless' approach: your data is processed locally in your browser and is never sent to our servers.
Q: Do I need to install any software?
R: No, no download or installation is required. Everything works directly in your web browser.
Q: Why is my CSV file unreadable in Excel (corrupted accented characters)?
R: Excel (Windows) does not handle standard UTF-8 encoding well when opening CSV files. To fix this, enable the 'UTF-8 BOM' option in our tool before downloading. This invisible marker at the beginning of the file signals to Excel that it should use Unicode encoding, guaranteeing correct display of accents and special characters.
Q: What does the 'Flatten' nested objects option do?
R: JSON can contain multi-level objects (e.g., {"client": {"name": "John", "email": "john@test.com"}}). A CSV cannot represent this hierarchy. The 'Flatten' option solves this by transforming nested keys into columns using dot notation: 'client.name' and 'client.email' become two distinct columns in your file.