Three straightforward steps
- Choose or paste the input requested by this tool.
- Configure the options and run the operation locally.
- Review and download or copy the result.
Data TOOL
CSV to JSON
Convert CSV, TSV, semicolon or pipe-delimited data into formatted JSON locally.
ON-DEVICESelected input is processed in this browser.
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The selected input stays under your control
On-device processing means the input is handled by browser APIs on the device running this page. Closing or refreshing the page normally clears the active in-memory working session.
Read the Privacy Policy →Convert delimited rows into structured JSON records
Parse quoted CSV correctly and map each row to its header names.
How to use it
- Paste or choose delimited data.
- Confirm the detected delimiter and header row.
- Convert, inspect and copy or download the JSON.
Supported input
- CSV with quoted fields
- TSV, semicolon and pipe-delimited text
Worked example
Convert a supplier CSV with name, SKU and price columns into an array of JSON objects for an import script.
Limitations
- All source values begin as text.
- Duplicate headers can produce ambiguous object keys.
Troubleshooting
- Confirm quoted multiline values close correctly.
- Clean duplicate or empty headers before conversion.
Tool-specific questions
Are numbers automatically typed?
Values may remain strings to avoid silently changing identifiers.
Are commas inside quotes preserved?
Yes, a proper parser distinguishes quoted delimiters.
Before you process
Can I use this csv to json online without uploading my input?
Yes. This tool is labelled On-device, so the selected input is processed in your browser and is not sent to a ForgeMyFile processing API.
What happens if the browser cannot process it?
The tool shows a readable error and stops. It does not silently fall back to a cloud upload.
Why can performance differ between devices?
The browser is doing the work locally, so speed and practical file size depend on available memory, CPU and browser capabilities.