About CSV to JSON
CSV to JSON reads the first row as the header and produces an array of objects in which each row becomes one object keyed by those header names. Values are treated as strings, since CSV carries no type information beyond what the text itself suggests.
The parser understands quoted fields, which is the part that separates a usable converter from a naive one. A field wrapped in double quotes may contain commas, and a literal quote inside such a field is written as two consecutive quotes; both are handled, so addresses, descriptions and embedded JSON survive intact.
Empty rows are discarded rather than converted into objects with empty values, which keeps trailing newlines from adding a spurious record at the end of the array. Header names are trimmed, so a stray space after a comma will not produce a key that never matches.
How to use CSV to JSON
- 1 Paste the CSV content, with the header row first.
- 2 The equivalent JSON array appears immediately, with two-space indentation.
- 3 Copy the output into your code, or continue by converting it to another format.
Frequently asked questions
What happens if a value contains a comma?
Wrap that field in double quotes and the comma is treated as data rather than a separator. This is standard CSV behaviour, and the parser honours it, so addresses and descriptions with punctuation convert correctly.
How do I put an actual quotation mark inside a quoted field?
Write it twice — "" inside a quoted field means one literal double-quote character. This is the standard CSV escape and the parser applies it, so exported data that already follows the convention converts without further work.
Are numbers converted to numeric types?
No. Every value arrives as a string, because CSV offers no way to distinguish the text "42" from the number 42. If your downstream code needs numbers, convert the fields after parsing — it also avoids surprises with values such as postal codes that should stay strings.
What if the first row is not a header?
It will be used as one regardless, and your first data row will be consumed as column names. Add a header row before converting if the file does not have one, since there is no way for the parser to tell the difference on its own.
Free, online, and private
Free to use
CSV to JSON is completely free. There is no account to create, no login, and no hidden charge or usage limit.
Runs online in your browser
It is a free online tool that runs entirely in your browser. Nothing to download or install — open the page and start using it right away.
Your data stays private
All processing happens locally on your device. Your input is never uploaded, stored, or tracked, so it never leaves your browser.
How CSV to JSON behaves in detail
These are the specifics of this implementation — the exact ranges, defaults and fixed settings you are working with.
| Parameter | Value |
|---|---|
| Header row | the first row is always treated as the field names |
| Quoted fields | supported — including a doubled "" as an escaped quote inside a value |
| Line endings | CRLF and LF both handled |
| Blank rows | dropped — fully empty rows do not become records |
| Value types | every value stays a string — nothing is inferred as a number or boolean |
Compiled from the implementation of this tool and checked against it by itoolnet.
What CSV to JSON does not do
Knowing the edges of a tool saves more time than another list of its features. These are the cases where it will not do what you might expect.
- Delimiter is fixed to the comma. Semicolon-separated and tab-separated files (common in locales where the comma is a decimal separator) parse as a single column rather than being detected.
- All values are strings in the output — "42" stays "42" and not 42. That is safe for keys, codes and leading zeros, but you will need to cast numeric fields yourself before using them in arithmetic.
Tested and documented by itoolnet, the team that builds and maintains this site.