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CSV to JSON Converter
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Spreadsheet exports and database dumps are usually delivered as CSV, but modern APIs and JavaScript applications work natively with JSON. This CSV to JSON converter parses CSV rows into an array of JSON objects, using the header row as keys and automatically inferring data types so numbers and booleans aren't left as plain strings. It's ideal for developers importing spreadsheet data into an app, data analysts prepping fixtures for testing, or anyone who needs CSV reshaped into structured JSON quickly. Custom delimiters and quoting rules are handled automatically, so even messy exports from Excel or Google Sheets parse correctly. Everything runs client-side in your browser, meaning your data is never uploaded, and there's no signup required. Paste your CSV below to get structured JSON output instantly.
Features
- Converts CSV rows into an array of JSON objects
- Uses the header row as object keys automatically
- Infers numbers and booleans, keeping identifiers as strings
- Handles quoted fields, embedded commas, and escaped quotes
- Configurable delimiter (comma, semicolon, tab)
- Instant copy-to-clipboard or download as .json
- Preview of parsed JSON before export
- Fully client-side conversion with no upload
Why use this csv to json converter?
- Converts CSV to JSON instantly, even for large files
- Keeps spreadsheet data private with local processing only
- Infers types without corrupting codes like 01234 or 1.50
- No manual scripting or spreadsheet macros needed
- Completely free with unlimited conversions
Frequently asked questions
How does CSV to JSON conversion handle the header row?
The first row of the CSV is treated as field names and becomes the keys for each JSON object generated from the remaining rows.
Does the converter detect number and boolean types?
Yes. A value becomes a number only when converting it back yields the identical text, so 42 and 3.14 are emitted as numbers while identifiers such as 01234 and trailing-zero decimals such as 1.50 stay strings. Values reading true or false become booleans, and empty cells stay empty strings.
Can it handle CSV with commas inside quoted fields?
Yes, standard CSV quoting rules are respected, so commas or line breaks inside quoted fields don't break the parsing.
What if my file uses semicolons instead of commas?
You can change the delimiter setting to semicolon, tab, or another character to match how your CSV file is formatted.
Is my CSV data uploaded to a server for conversion?
No, the entire parsing and conversion process runs locally in your browser, keeping your data private.
Can I convert the resulting JSON back into CSV?
Yes, use the companion JSON to CSV converter to reverse the transformation at any time.
Does it work with large CSV files with thousands of rows?
Yes, thousands of rows typically parse instantly, since processing happens locally without a network round-trip.
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