CSV ⇄ JSON Converter
Convert CSV to JSON and back — or turn a spreadsheet's columns straight into a suggested form field list.
Converting between CSV and JSON
CSV is how spreadsheets and exports move data around; JSON is how applications and APIs consume it. This converter goes both ways entirely in your browser — paste a CSV and get a clean JSON array of objects, or paste a JSON array and get properly-quoted CSV.
Nothing is uploaded, so it's safe to run real customer or form-submission data through it.
How the CSV parser handles the hard cases
Real-world CSV is messier than it looks. The parser correctly handles quoted fields, commas and line breaks inside quotes, and escaped double-quotes — and it always treats the first row as the header.
In the JSON-to-CSV direction it collects every key across all your objects, so no column is silently dropped when records have different shapes.
Turn a spreadsheet into a form
The third mode reads a CSV header row and suggests a form field for each column, inferring the type from the column name — “email” becomes an email field, “signup_date” a date, “is_subscribed” a checkbox. It's a fast way to scaffold a form from data you already have.
SimilarForm takes this further: show it the actual spreadsheet, an image, or a URL and it recreates the entire form — fields, layout, and branding — in under 30 seconds.
Questions & answers
Does my data get uploaded?+
No. The CSV or JSON you paste is parsed and converted entirely in your browser. Nothing is sent to a server — safe for real customer data.
What CSV quirks does it handle?+
Quoted fields, commas and line breaks inside quotes, and escaped double-quotes. The first row is always treated as the header.
What is the 'CSV → form fields' mode?+
Paste a spreadsheet's header row and the tool suggests a form field for each column — guessing the field type from the column name, like email, phone, date, or number.
What does JSON → CSV expect?+
A JSON array of objects. The converter collects every key across the objects to build the header row, then quotes any value that needs it.
Turn that spreadsheet into a real form.
SimilarForm reads a spreadsheet, image, or URL and recreates the whole form — fields and all — in under 30 seconds. Free to start.