JSON to CSV Converter
Convert an array of JSON objects into CSV with a union of column names.
Open toolCSV To JSON Converter
Parse quoted CSV and map unique headers to object keys. A header row with unique, nonempty names is required.
Free to useNo sign-upRuns in your browser
Enter your details
Enter the inputs, then select Convert CSV.
Your result
Enter your details
Result will appear here
How CSV To JSON Converter works
Parse quoted CSV and map unique headers to object keys.
A header row with unique, nonempty names is required. Every value remains a string, preserving leading zeros. Source limit: 100,000 characters; other CSV tools accept 10,000 records and 100 columns.
How to use CSV To JSON Converter
Start with your own input.
Input and settings
Tool result
Run and check the output
Select Convert CSV. Review an array of string-valued objects, then use Copy result or download the result file.
Review the details
When to use CSV To JSON Converter
Convert a small data fixture
To convert a small data fixture, start with csv source. Parse quoted CSV and map unique headers to object keys.
Preserve a table excerpt
To preserve a table excerpt, start with csv source. A header row with unique, nonempty names is required.
Prepare a local interchange file
To prepare a local interchange file, start with csv source. Review an array of string-valued objects, then use Copy result or download the result file.
How to read the result
Check what the output means.
An array of string-valued objects. Parse quoted CSV and map unique headers to object keys.
A header row with unique, nonempty names is required. Every value remains a string, preserving leading zeros. Source limit: 100,000 characters; other CSV tools accept 10,000 records and 100 columns.
Supported input and limits
Check the format before processing.
A header row with unique, nonempty names is required. Every value remains a string, preserving leading zeros. Source limit: 100,000 characters; other CSV tools accept 10,000 records and 100 columns.
Inputs and results are handled in this browser.
More free tools to try
Choose another tool for your next calculation, conversion, or text task.
CSV to Parquet Converter
Write CSV records into a real Parquet file with UTF-8 string columns. Numbers and dates remain text, preserving leading-zero identifiers for later processing.
Open tool
CSV to TSV Converter
Convert comma-separated records to tab-separated text. Quoted commas, tabs and line breaks remain inside their cells; download the TSV for your next import.
Open tool
CSV To XML Converter
Parse quoted CSV and write a rows root containing row and field elements.
Open tool
CSV Validator
Check CSV quoting and consistent column counts, then review the record count and selected delimiter.
Open toolConvert CSV with your input
Review an array of string-valued objects, then use Copy result or download the result file.
CSV To JSON Converter: common questions
Answers about using CSV To JSON Converter and understanding its results.
What does this tool support?
A header row with unique, nonempty names is required. Every value remains a string, preserving leading zeros. Source limit: 100,000 characters; other CSV tools accept 10,000 records and 100 columns.
Can I save the result?
Yes. Download the result file after processing. Text results also have Copy result. Processing uses local browser code; no account is required.