How to Convert CSV to JSON online
CSV stores a table as plain text, one row per line with commas between values. Paste it or drop the file below to get clean JSON instantly – no Python, no command line, and your data never leaves your any device.
Converted on your device. Your data never leaves your browser.
Step by step: Convert CSV to JSON online
- 1
Open this page in any modern browser – Chrome, Safari, Edge or Firefox, on a computer or phone.
- 2
Paste your CSV into the box, or drop your file onto the box above, or click it to choose a file.
- 3
The JSON appears as you type or as soon as the file loads.
- 4
Copy it, or click Download to save the result. It goes wherever your browser saves downloads.
How the CSV is converted
- The first row becomes the field names, and each following row becomes one JSON object.
- Numbers and true/false values are kept as numbers and booleans rather than text, and quoted cells with commas or line breaks are handled correctly.
About CSV and JSON
- CSV stores a table as plain text, one row per line with commas between values. It's what Excel, Google Sheets, banks and most databases export.
- JSON is the data format of web APIs and JavaScript apps: records with named fields, which can be nested inside each other.
Good to know
- Nothing is installed and there's no account. The conversion runs in your browser tab, so it works the same on Windows, Mac, Linux, iPhone, Android and Chromebook.
CSV vs JSON
| CSV | JSON | |
|---|---|---|
| Compression | Plain text | Plain text |
| Best for | Spreadsheets and table exports | APIs, apps and config files |
| Support | Every spreadsheet and database | Every programming language |
Frequently asked questions
Do I need to write code to convert CSV to JSON?
No. Paste or drop the file and the converted version appears straight away – no scripts, libraries or terminal.
How big a file can it handle?
Files of several megabytes convert in a moment. There's no fixed limit; the only constraint is your device's memory.
Is my data uploaded to a server?
No. The conversion runs in your browser using your device's own processor, so your data never leaves your device. You can even disconnect from the internet once the page has loaded.
Need more options? Open the full CSV to JSON tool →