CSV to JSON Converter
Parse header-based CSV into JSON records while preserving every field as text.
The first record becomes the property-name row. Commas, line breaks, and doubled quotes inside quoted fields are preserved.
JSON output
Converted JSON records will appear here.
Where a CSV row becomes a JSON object
A header-based CSV has two jobs hidden in one text file: the first record names the fields and every later record supplies values in the same positions. Conversion is straightforward only when those positions stay aligned. This page therefore rejects short or wide records instead of quietly inventing missing cells or discarding extras.
Every CSV field remains a JSON string. Values such as 0012, true, and 2026-09-07 are not guessed into numbers, booleans, or dates. That keeps identifiers and formatting intact; type conversion can happen later with domain knowledge.
Quoted fields are records, not simple string splits
A comma inside a quoted field is content, not a separator. The same is true for line breaks. A literal quote inside a quoted field is represented by two consecutive quotes. The parser also rejects characters after a closing quote until the next comma or record break, which catches inputs such as "value"x instead of accepting an ambiguous record.
CSV is less universal than the extension suggests
RFC 4180 documents a widely used comma-separated form with CRLF records and quoted-field rules, but it is informational and explicitly notes variation between implementations. This page expects commas and accepts CRLF, LF, or CR record endings. Semicolon and tab exports belong in a delimiter-aware parser rather than being guessed here.
Unusual property names stay data
Headers are preserved exactly, including names such as __proto__. Records are built without inheriting from Object.prototype, so those names cannot alter the intermediate object's prototype.
A small example with the parts that usually break
name,note Sneha,"comma, stays here" Varoun,"quote: ""hello"""
The two data records become JSON objects; the comma and quote stay inside their original field values. A row with a different field count stops conversion so column alignment is visible rather than guessed.
Before the JSON goes into an API or database
- Decide which fields are genuinely numeric or boolean after conversion, not from their appearance alone.
- Check header whitespace and capitalization when downstream property names are case-sensitive.
- Keep multiline text as strings unless the destination has a different newline convention.
- For very large exports, stream or batch the conversion instead of loading the whole file into a browser tab.
The CSV reference behind the parser
The quoted-field and record-shape rules are based on the common format documented in RFC 4180. The RFC is useful as a baseline, not a claim that every spreadsheet export follows one master CSV grammar.