CSV ↔ JSON Converter
Convert comma-separated values to JSON objects and vice versa.
About CSV / JSON conversion
CSV is the lowest-common-denominator format for tabular data: every spreadsheet, every database, and every analytics tool can read and write it. JSON, on the other hand, is the format of choice for APIs, configuration, and document-style data. Converting between the two is a near-daily task for anyone working at the boundary between web applications and analytics. This tool round-trips data in both directions, handles quoted fields, escaped commas, and headerless CSVs.
Conversion happens in the browser, so financial exports, customer lists, and audit spreadsheets can be pasted in safely without leaving your machine.
How to use
- Pick the direction: CSV → JSON or JSON → CSV.
- Paste your data into the input panel.
- Choose the delimiter (comma, tab, semicolon) and whether the first row is a header.
- Copy or download the converted output.
Common use cases
- Loading a CSV export from a SaaS tool into a script that expects JSON.
- Producing a CSV summary from a JSON-API response for a non-technical stakeholder.
- Converting between formats for ETL pipelines.
- Preparing test fixtures for unit tests in either format.
Frequently asked questions
How are nested objects handled when going JSON → CSV?
They are flattened with dot notation by default — {"user": {"name": "X"}} becomes a column named user.name. Toggle the "stringify nested" option to keep them as JSON strings.
What about commas inside fields?
Fields containing the delimiter are wrapped in double quotes. Embedded double quotes are escaped by doubling.
Does it support TSV?
Yes — choose the tab delimiter in the settings.
Advertisement