JSON to CSV Converter
Data ConvertersConvert JSON arrays or objects to CSV instantly. Nested objects are flattened into dot notation, arrays kept as clean JSON cells, with live preview and one-click .csv download.
Paste a JSON array or object (or click "Load Sample") to preview flattened CSV.
JSON to Excel Converter
Turn JSON arrays into real .xlsx spreadsheets in seconds. Auto-sized columns, a live spreadsheet preview, plus one-click Excel and PDF table export — 100% local and free.
JSON to YAML Converter
Convert JSON to clean, readable YAML instantly. Choose 2 or 4 space indentation, validate JSON in real time, then copy or download — nothing ever leaves your browser.
YAML to JSON Converter
Convert YAML to formatted or minified JSON in one click. Real-time validation, pretty 2-space output or compact single-line JSON, copy and download — 100% client-side.
JSON to Pydantic Model Generator
Generate Python Pydantic v2 BaseModel classes from JSON. Nested models, Optional fields, list[...] and dict[...] hints, aliases via Field — copy-paste ready Python code.
How to Use
Three steps from raw data to finished output — no account required.
- 1
Paste a JSON array or object into the left pane, or upload a .json file you already have.
- 2
Watch the flattened CSV preview build instantly — nested keys become dot-notation columns.
- 3
Copy the CSV or download it as a .csv file that opens directly in Excel, Sheets or Numbers.
Frequently Asked Questions
Everything you need to know about the json to csv converter.
Nested objects are expanded into dot-notation headers, so address.city becomes an address.city column. Arrays and mixed values are serialized as compact JSON inside a single cell, preserving every value while keeping the CSV rectangular and valid.
Yes — that is the most common case. Each object in the array becomes one CSV row, the union of all keys becomes the header row, and missing values are left blank so columns stay aligned across records.
Yes. The output uses RFC-style quoting and CRLF line endings and is downloaded with a UTF-8 BOM, so accents, emoji and special characters render correctly in Excel, Google Sheets, LibreOffice and Numbers.
Never. Flattening and CSV serialization run entirely in your browser. Files you upload are read with the local File API and are not transmitted to any server, making the tool safe for business and customer data.