CSV to JSON
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Step 1: Submit the CSV file you want to convert to JSON to the upload box at the left.
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Step 2: Wait a moment while your JSON output is created.
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Step 3: Once the conversion has been completed, you will see the download button. Click on it to download your JSON file.
What to expect when converting CSV to JSON
Real numbers from every conversion on this tool since 24 October 2026. Nothing here is estimated: we record how long each job took and how large the files were. File names and contents are never stored.
How long conversions take
share of all conversions
- under 1 s100%
- 1–10 s0%
- 10–60 s0%
- 1–5 min0%
- over 5 min0%
Times are server processing only, measured after the upload finished; upload and download are not included. Large files take longer, but the limit is the same for everyone: no account, no queue priority to buy. Updated 2026-11-09
CSV to JSON Converter
You can use this free web app to convert any CSV to JSON online. The following example shows which result you can expect when using this tool:
timestamp,open,high,low,close
2022-03-15,1.09430,1.10199,1.09360,1.09816
2022-03-14,1.09172,1.09940,1.08990,1.09420
2022-03-11,1.09840,1.10435,1.09000,1.09099
[
{"timestamp":"2022-03-15","open":"1.09430","high":"1.10199","low":"1.09360","close":"1.09816"},
{"timestamp":"2022-03-14","open":"1.09172","high":"1.09940","low":"1.08990","close":"1.09420"},
{"timestamp":"2022-03-11","open":"1.09840","high":"1.10435","low":"1.09000","close":"1.09099"},
]
Using our online tool works for converting CSV files from all platforms including Windows, Mac, or Android. If you are looking for a local solution for doing the conversion there is a quick solution too, all you need is NPM.
Converting CSV to JSON with NPM
NPM has become one of the world's largest Software Registries, offering almost one million packages. One of them is csv2json which offers a lot of options for converting CSV spreadsheets into JSON files. Assuming you have NPM set up in your system the installation and usage are simple. For installing the package type:
For the following, we assume that you have an NPM installed on your system. The steps have been verified under Ubuntu Linux. Simply type the following command to install csv2json:
npm install csv2json
After the successful installation, you can use csv2json right away from the command line prompt of your OS:
csvtojson example.csv > example.json
The output will be available in a file called example.json.