Hack the Hydra

CSV to JSON converter

Paste CSV (Ctrl+V) or drop a .csv file: the header row becomes the keys and every line becomes a JSON object.

🔒 Private by design: the conversion runs in this browser tab. Nothing is uploaded.

CSV to JSON converter is a free online tool by Hack the Hydra. Convert CSV to a JSON array of objects in your browser. Header row becomes keys, delimiters detected automatically. Paste CSV or drop a file.

100% freeNo upload: runs in your browserNo sign-up

Delimiters and quotes

Comma, semicolon and tab-separated files are detected, and quoted fields with commas or line breaks are handled.

Empty cells

Empty cells become null so every object has the same keys.

How to use

  1. Drop your file in the box above, or click to pick it.
  2. Wait a few seconds while it converts locally.
  3. Copy the result or download it.

FAQ

Is there a size limit?

Only your browser memory. Files of tens of megabytes usually work.

Is my data uploaded?

No, parsing happens in your browser.

Guides

Bulk conversion API

Batch-convert DOCX, PPTX, XLSX, HTML and EPUB by URL: $2 per 1,000 files. Open the API →

curl -X POST "https://api.apify.com/v2/acts/extas_corp~document-to-markdown/run-sync-get-dataset-items?token=YOUR_TOKEN" \
  -H "Content-Type: application/json" -d '{"documentUrls":[{"url":"https://filesamples.com/samples/document/docx/sample3.docx"}]}'

Use it via API, with a free plan: Document to Markdown API (RapidAPI) · Apify

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