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CSV to JSON Converter — Free Browser-Based, RFC 4180 Compliant

Convert CSV (or TSV / pipe-separated) data to JSON. Auto-detects delimiter, RFC 4180 compliant.

Free No signup Client-side Privacy friendly Updated

How to use

  1. 1 Paste your CSV data into the input.
  2. 2 Pick the delimiter (or leave on Auto-detect).
  3. 3 Toggle "First row is header" off if your data has no header.
  4. 4 Copy or download the JSON.

Why use this tool

  • RFC 4180 compliant — handles quoted fields, escaped quotes, embedded newlines.
  • Auto-detects tab, comma, semicolon, pipe delimiters.
  • With header: produces array of objects keyed by column. Without: array of arrays.
  • Pure client-side — your data never leaves your browser.

Frequently asked questions

Does it handle quoted commas inside cells?

Yes — RFC 4180 quoting. A field like "New York, NY" is preserved as a single cell.

What about cells with newlines inside?

Supported if the cell is wrapped in double quotes. The newline becomes part of the cell content.

Will numbers be parsed as numbers?

No — all values are output as strings (CSV has no type info). Convert in post-processing if needed.

What is CSV to JSON Converter?

A CSV to JSON Converter is a tool that transforms CSV data into JSON. It also accepts TSV and pipe-separated input and auto-detects the delimiter, parsing rows and columns in an RFC 4180 compliant way before emitting structured JSON. It runs entirely in the browser, converting the data locally on the device without uploading it to a server.

How CSV to JSON Converter compares to alternatives

CSV to JSON Converter versus typical browser and desktop alternatives — features compared at a glance.
Feature Zerethon Tools Typical online tools Desktop apps
Signup required No Sometimes N/A
Data leaves device No Yes (server-side) No
Delimiter auto-detect CSV / TSV / pipe Sometimes Varies
RFC 4180 compliant Yes Sometimes Varies
Free Yes Yes (with ads) Sometimes paid
Works offline Yes (after load) No Yes
Summary

CSV to JSON Converter is a free developer utility by Zerethon Tools. Convert CSV (or TSV / pipe-separated) data to JSON. Auto-detects delimiter, RFC 4180 compliant. Runs entirely in the browser — no signup, no upload.

Category
Developer
Pricing
Free
Privacy
Browser-based
Signup
Not required

Privacy

Your data never leaves your browser unless explicitly stated. CSV to JSON Converter runs entirely client-side — no server upload, no logging, no tracking of your input.

Compare

CSV vs JSON

Learn the basics

What is CSV?

How-to guides

How to convert csv to json

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