100% client-side, nothing ever leaves your browser
Convert CSV to JSON
Paste CSV data and get clean JSON, powered by a proper character-level parser that correctly handles quoted fields, embedded commas, and line breaks.
How CSV to JSON conversion works
A character-level parser reads your CSV, correctly tracking quoted fields, so commas and line breaks inside a value never get mistaken for delimiters.
Paste your CSV
Include a header row — its values become the JSON key names for every record.
Automatic parsing
Each subsequent row becomes one JSON object, matched to the header by column position.
Copy or download
Switch between pretty and minified formatting, then copy the JSON or download it as a file.
Privacy note: parsing happens entirely in your browser using JavaScript. Your data is never uploaded, logged, or stored on a server.
Common uses
Feeding data into an API
Convert a spreadsheet export into JSON so it can be posted directly to an API that expects JSON payloads.
Seeding test data
Turn a CSV of sample records into JSON fixtures for tests or local development.
Working with config files
Some tools store settings as JSON; converting a CSV table is often faster than typing it out by hand.
Debugging exported data
Viewing rows as structured JSON objects can make it easier to spot missing or malformed values than scanning raw CSV.
Frequently asked questions
Does this handle commas inside quoted fields?
Yes. The parser reads CSV character by character and tracks whether it is inside a quoted field, so a comma between double quotes is treated as part of the value rather than a column separator.
Does it handle line breaks inside a field?
Yes. A line break inside a quoted field is preserved as part of that field's value instead of starting a new row, matching standard CSV behavior.
How are escaped quotes handled?
Two consecutive double quotes inside a quoted field are interpreted as a single literal double quote character in the output, which is the standard CSV escaping convention.
What is the difference between pretty and minified JSON?
Pretty JSON is indented and easier to read, while minified JSON removes all unnecessary whitespace to produce a smaller file, which is useful when the output will be used programmatically rather than read by a person.
Is my data uploaded anywhere?
No. Parsing happens entirely in your browser using JavaScript. Nothing you paste is sent to a server.
What if my CSV has an empty header column?
The tool requires every column in the header row to have a name, since an unnamed column can't become a meaningful JSON key. It shows an error telling you which row caused the problem.
More tools
Additional utilities from the same toolkit. Comparing CSV against JSON, YAML and XML? Read JSON vs YAML vs XML vs CSV →