How to Convert CSV to JSON on Windows
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 Windows PC.
Converted on your device. Your data never leaves your browser.
Step by step: Convert CSV to JSON on Windows
- 1
Open this page in Edge, Chrome or Firefox on your PC.
- 2
Paste your CSV into the box, or drag the file from File Explorer onto the box above, or click the box to browse for it.
- 3
The JSON appears as you type or as soon as the file loads.
- 4
Copy it, or click Download. The file goes to your Downloads folder (File Explorer › 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.
Tips for Windows PC
- Nothing to install, so it works on work and school PCs where you can't add software.
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 →