How to use the CSV to JSON
- Paste your CSV into the input box, or open a file.
- Adjust the options if needed. The output updates as you type.
- Copy the JSON or download it as a file.
About CSV
CSV (comma-separated values) is the universal format for spreadsheets and data exports. The first row holds column names and each following row is one record.
About JSON
JSON (JavaScript Object Notation) is the default data format of web APIs, package manifests and most configuration tooling. It supports objects, arrays, strings, numbers, booleans and null.
How it works
The first row is used as column names. Numbers and booleans are detected automatically, and dotted headers such as address.city are expanded back into nested objects.
Private by design
Developer data is often sensitive: API responses, tokens, customer records, internal configs. This CSV to JSON processes everything locally in your browser tab. There is no server round-trip, no logging and no storage of your input.
Frequently asked questions
Is this CSV to JSON free?
Yes. This CSV to JSON is completely free to use with no sign-up, no limits and no ads inside the tool.
Is my data uploaded to a server?
No. The CSV to JSON runs entirely in your browser using JavaScript. Nothing you paste is sent to DevT Pro or any other server.
Does the CSV to JSON conversion lose data?
The first row is used as column names. Numbers and booleans are detected automatically, and dotted headers such as address.city are expanded back into nested objects.
Can I use the CSV to JSON offline?
Yes. CSV to JSON is also built into DevT Pro, a native app for Mac, Windows, iPad and Linux with 120+ developer tools that work fully offline. It is a $5.99 one-time purchase with no subscription.
