CSV to JSON Converter

Paste CSV and get formatted JSON in real time.

Processed locally — nothing is uploaded

Input

Output

About Code Formatter

Useful for making a minified payload readable again, for checking that a config parses before you ship it, or for stripping a file down for production. Switching language keeps whatever you have already pasted.

Turn CSV rows — copied from a spreadsheet or exported from a database — into a structured JSON array of objects, using the header row as keys. Everything is parsed locally in your browser, so your data stays private and there are no row limits.

Paste messy or minified code and instantly beautify, minify or validate JSON, HTML, CSS, SQL, XML and YAML. Beautifying re-indents your source with consistent spacing so it is easy to read and review; minifying strips whitespace and comments to ship smaller files; validating surfaces syntax errors with the exact location so you can fix them fast.

It also doubles as a converter between common data formats — JSON to CSV, CSV to JSON, YAML to JSON and back — which is handy when wiring up APIs, configs or spreadsheets. Converting is where structure mismatches surface: CSV has no nesting, so a nested JSON object has to be flattened or dropped.

Learn how this works

A Practical Guide to Everyday Developer Encoding & FormattingHow and when to use Base64, JSON formatting, hashing, JWTs, regex and cron — with free in-browser tools for each task.11 min read

Frequently asked questions

Does the first row have to be a header?

Yes — the header row supplies the object keys, so `name,email` produces objects with `name` and `email` properties. If your file starts straight into data, add a header row before converting or the first record will be consumed as the key list.

Are numbers converted, or left as strings?

Values are kept as strings, which is the safe default: it preserves leading zeros in postcodes, product codes and phone numbers that would otherwise be destroyed by numeric coercion. Cast the fields you need on the consuming side.

Can it handle quoted fields containing commas?

Yes. Quoted fields are parsed per RFC 4180, so commas, line breaks and doubled quotes inside a value are read as part of that value rather than as delimiters.

Pro Tips

→Paste unformatted JSON, HTML, CSS, or SQL code and apply consistent indentation (2, 4, or tab spaces) in one click.
→Use minification toggle to reduce code size by 30-50% for production deployment or email constraints.
→Export formatted code directly to clipboard to paste into documentation, emails, or config files instantly.
→Compare formatted vs minified side-by-side to verify code compression doesn't break syntax.

Common Use Cases

•Converting a spreadsheet export into fixture data for tests or a seed script
•Reshaping a analytics or finance CSV into a JSON body for an API request
•Loading legacy CSV records into a document database or a JSON-based config

How It Compares

While Prettier and VS Code extensions require installation and configuration, our web-based formatter works instantly on any device without setup, offering broader language support (HTML, CSS, SQL) in a single tool compared to language-specific formatters like Beautifier.io.

More Code Formatter tools

Code Formatter JSON to CSV Converter CSS Minifier JavaScript Unminifier SQL Prettifier XML Beautifier YAML to JSON Converter JSON to YAML Converter Validate JSON Online Validate JavaScript Syntax