CSV to JSON Converter
A free, browser-based file tool. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Runs entirely in your browser — nothing is uploaded or stored.
How to use this calculator
- Paste CSV or a JSON array.
- Press CSV → JSON or JSON → CSV.
How it works
CSV → JSON reads the first row as column names and turns each later row into an object. JSON → CSV does the reverse, flattening an array of objects into a comma-separated table.
Worked example
name,age / Ada,36. becomes [{"name":"Ada","age":"36"}].
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.