CSV to JSON, on your device
CSV is how spreadsheets and databases export tabular data; JSON is what APIs, apps and config files expect. Converting between them is an everyday developer task — and doing it in your browser means your data never touches a server, which matters when the file holds customer records, financials or anything private.
How the mapping works
Mynify treats the first row as the header. Each column name becomes a key, and every subsequent row becomes a JSON object, producing a clean array like [{ "name": "Ada", "age": 36 }, …]. Numbers are detected and output as numbers, not strings, so the JSON is ready to use.
Under the hood it uses a robust CSV parser that correctly handles the tricky cases — quoted fields, commas inside values, and line breaks within cells — that trip up naive splitters.
When to use it
- Feeding a spreadsheet’s data into an app or API that wants JSON.
- Seeding a database or a test fixture from a CSV export.
- Quick inspection — JSON is often easier to read and diff than raw CSV.
Tip
Need the reverse? JSON to CSV turns an array of objects back into a spreadsheet-ready file.
Free, unlimited, no signup, no watermark — converted entirely on your device.