CSV to JSON

Paste CSV and get clean JSON — with auto-delimiter and smart type detection.

100% Browser-Based — code never uploads to our servers. All processing runs locally in your browser.

Paste CSV

Tip: drag & drop a file onto this card, or use Upload / Import Example below.

Upload File

Tool Options

Delimiter

Header row Nested objects (dot keys) Number detection Boolean detection Live convert

Results

Results will appear here…

How It Works

Fast developer utilities that run entirely in your browser.

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Paste or upload

Paste code/data or upload a file. Use Import Example to try instantly. Nothing is uploaded to our servers.

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Process in browser

All parsing and conversion runs locally in your browser — 100% client-side.

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Copy or download

Export results as TXT, JSON, CSV, or JS instantly.

Zero server upload — your data stays on your device.

About CSV to JSON

Convert CSV to JSON with auto delimiter detection, header row, nested keys, number and boolean detection. Free browser tool. Built for developers, QA and SEO workflows with sample data, copy and multi-format export.

FAQs

Is my code uploaded?

No. All developer tools process your content in the browser. FreeConverter servers never receive your input.

Is this free?

Yes. FreeConverter.app online JS/JSON tools are free to use.

Do I need an account?

No account or installation is required.