Converter
CSV ↔ JSON Converter
Convert CSV to JSON or JSON to CSV with automatic delimiter detection, data-type controls, JSON Lines support, table previews, and downloadable output.
🔒 100% private browser processing
Your files and pasted data never leave your device. Conversion happens locally, and Xepoca does not upload or store the content.
Source data
Paste data below or import a local file.
Drop a CSV or TSV file here
Or click to browse · Maximum size 10 MB
Conversion settings
How CSV and JSON conversion works
CSV stores tabular data as rows and delimited fields. JSON stores structured values using objects and arrays. This converter maps each CSV row to a JSON object or maps each JSON object to one CSV row.
The CSV parser understands quoted fields, escaped double quotes, embedded delimiters, and line breaks inside quoted values. Automatic detection compares common delimiters and chooses the most consistent table.
During JSON-to-CSV conversion, all object keys become columns. Nested arrays and objects remain intact as compact JSON strings so their data is not silently discarded.
Built for real data workflows
API and developer data
Turn spreadsheet exports into JSON for APIs, prototypes, fixtures, and application imports.
Spreadsheet exports
Convert JSON records into CSV or TSV files that open cleanly in Excel and spreadsheet apps.
Flexible JSON formats
Create standard arrays, keyed objects, or newline-delimited JSON for streaming and data pipelines.
Safer conversion
Preview the table and review row-level notes before copying or downloading the converted result.
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Frequently Asked Questions
Is the CSV to JSON Converter free?+
Yes. Both conversion directions are free and do not require an account.
Are my CSV or JSON files uploaded?+
No. File reading, parsing, conversion, previewing, and downloading all happen locally in your browser.
Does it support commas inside CSV values?+
Yes. A comma inside a correctly quoted field remains part of that value instead of becoming a new column.
Can it detect semicolon and tab delimiters?+
Yes. Automatic detection checks comma, tab, semicolon, and pipe-separated data. You can also select or enter a delimiter manually.
What happens to numbers and booleans?+
CSV-to-JSON type detection can convert safe numeric values, true, false, and null. Values with meaningful leading zeros remain strings.
Can it convert JSON Lines?+
Yes. The converter can create JSON Lines and can read newline-delimited JSON when each non-empty line is valid JSON.
How are nested JSON objects converted to CSV?+
Nested objects and arrays are serialized as compact JSON inside one cell, preserving the complete value without flattening or data loss.