CSV ↔ JSON Converter
NewConvert CSV to JSON and back — RFC 4180 compliant, no uploads.
See how it works
Watch a quick simulation of this tool in action — no file needed.
How to use CSV ↔ JSON Converter
Follow these steps — everything happens instantly in your browser.
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Step 1. Pick the direction: CSV → JSON or JSON → CSV.
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Step 2. Optionally change the delimiter (comma, semicolon, tab, pipe).
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Step 3. Paste your input and click Convert.
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Step 4. Copy the output — error messages show line and column.
Why use this tool
Private by design
All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.
Instant
No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.
Free & unlimited
No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.
Works everywhere
Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.
Frequently asked questions
Everything you might want to know about csv ↔ json converter.
JSON to CSV
Convert an array of JSON objects into clean CSV — locally.
JSON Formatter
Beautify, minify and validate JSON — 100% in your browser.
JSONL Formatter
Beautify, minify and convert JSON Lines — log-friendly.
YAML ↔ JSON Converter
Convert YAML to JSON and back — pure JS, no dependencies.