Converter Tools
CSV to JSON Converter
Convert CSV to JSON and JSON to CSV in your browser. Custom delimiters, header row, smart number and boolean detection.
Convert
CSV and JSON in either direction
Delimiter
Options
Indent
Conversions run entirely in your browser. Nothing you paste is sent to a server.
How to use
- Pick a direction: CSV to JSON, or JSON to CSV.
- Choose a delimiter (comma, tab, semicolon, or pipe) and whether the first row is a header.
- Paste your CSV or JSON into the input area, or click Load sample to see an example.
- Read row, column, and byte stats above the output, then click Copy to copy the result.
About this tool
CSV to JSON Converter turns CSV rows into a JSON array of objects and turns JSON arrays back into CSV. It uses a strict RFC 4180 style parser that handles quoted fields, escaped quotes (""), and embedded commas or newlines, so spreadsheets exported from Excel, Google Sheets, or Numbers convert without surprises. Pick a delimiter (comma, tab, semicolon, or pipe), choose whether the first row is a header, and optionally let the converter detect numbers, booleans, and null values so the JSON output uses the right types instead of all strings. The reverse direction takes a JSON array of objects, derives the column union from every key, escapes quotes and delimiters according to the rules, and emits clean CSV. Conversions run entirely in your browser, so the data you paste never leaves your device, which makes the tool safe for customer lists, exports, and any internal data you would rather not upload.
Free to use. Works in your browser. No signup, no login.
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