Convert CSV to JSON format. Fast, secure, and completely free. All processing happens in your browser — no data is sent to any server.
CSV to JSON conversion reads a CSV file's header row as field names and converts each subsequent row into a JSON object with those fields as keys, producing an array of objects that mirrors the tabular data in a structure most modern APIs and JavaScript code can consume directly. CSV itself has no concept of nested data or explicit types — every cell is just text — so this conversion also handles the practical details of correctly parsing quoted fields, escaped commas within values, and inferring whether a cell should become a number, boolean, or string in the resulting JSON.
Data frequently starts life as a CSV — exported from a spreadsheet, a database report, or a third-party system — but needs to become JSON to be consumed by a modern API, a JavaScript frontend, or a document database. Parsing CSV correctly by hand is trickier than it looks once you account for quoted fields containing commas, escaped quotes within values, and inconsistent line endings; this tool handles those edge cases reliably so you get clean, correctly-typed JSON on the first try.
Correctly quoted fields (like "Smith, John") are parsed as a single value rather than being incorrectly split at the comma, following standard CSV quoting rules.
With type inference enabled, values that look like numbers or booleans are converted accordingly; without it, every value is kept as a plain string, which can be safer when a field like a ZIP code needs to preserve a leading zero.
Yes, delimiter detection or manual selection lets you correctly parse CSV variants that use semicolons, tabs, or other separators.
Missing values are typically represented as empty strings or null in the resulting JSON object for that field, rather than causing the conversion to fail.
There's no hard limit, but very large files (hundreds of thousands of rows) may take noticeably longer since processing happens in your browser rather than on a server.