CSV to JSON Converter Online Free
Paste CSV with a header row and get a JSON array of objects instantly. Row count badge confirms records converted — swap to JSON → CSV tab to verify round-trip without uploading spreadsheet data.
Browser Tools vs Server Upload — Why Local Processing MattersEverything runs in your browser. Your input is never uploaded, stored, or logged on our servers.
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Read guideFrequently asked questions
How do I convert CSV to JSON online for free?+
Paste CSV with column headers in the first row — JSON array output updates live. Quoted fields with commas are handled correctly.
Can I convert JSON back to CSV?+
Yes. Use the JSON → CSV tab in the same workbench — input and tab are shareable via link.
Is this tool free?+
Yes. Every Utiliio utility is free with no sign-up, usage limits, or paywalls.
Do you store my data?+
No. Processing happens entirely in your browser. Your input never leaves your device.
Can I use this tool offline?+
Yes. Once the page loads, most tools continue working without an internet connection.