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CSV to JSON converter

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CSV to JSON converter in your browser. Paste a spreadsheet export or drop a file, get pretty JSON ready to copy. Free, private, nothing uploaded.

CSV → JSON · in your browser

Delimiter

File encoding

Conversion runs on your device — the file is not uploaded. Excel exports often use a comma or semicolon delimiter; pick Auto if you are unsure.

How it works

  1. 1

    Upload CSV

    Or paste a table. Check delimiter and encoding.

  2. 2

    Build JSON

    Array of objects — keys from the header row.

  3. 3

    Into code or an API

    Copy JSON or download .json — all in the browser.

Need more room?

Pro lifts daily file caps. Plus adds keyword research when you outgrow free checks.

See plans — from $9/mo

Why people use Toolsy

Fast

You get the result in a second. No waiting in a line.

Private

Browser tools stay on your device. Uploaded files are processed and discarded with the response.

No sign-up

Open the page and start. An account is only for paid plans.

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Convert CSV to JSON without uploading a file

CSV to JSON turns a spreadsheet export into a JSON array of objects. Column headers become keys you can paste into an API or script.

Paste text or drop a file. Pick auto, comma, semicolon, or TAB. Copy or download the result in one step.

This page is spreadsheet-in, JSON-out. For the reverse direction, open JSON to CSV. Both tools stay on your device.

Good for

  • API fixtures from Excel
  • Import scripts
  • Quick CSV cleanup
  • TSV and EU delimiters

Tips

  • Keep a header row
  • Try Auto first
  • Use JSON to CSV for the reverse
  • Nothing leaves your browser

Common questions

How do I use the CSV to JSON converter?

Paste CSV or drop a file, pick a delimiter if needed, then copy or download the JSON array.

Is the CSV to JSON converter free?

Yes. There is no daily limit on this page. An account is only for favorites and paid plans.

Does CSV to JSON upload my file?

No. Conversion runs in your browser. We do not see or store what you paste.

Which delimiter should CSV to JSON use?

Auto usually works. Use comma for US Excel exports, semicolon for many EU exports, or TAB for TSV.

CSV to JSON or JSON to CSV?

Use CSV to JSON when you start from a spreadsheet. Use JSON to CSV when you start from an API array.

CSV to JSON Converter Free — Toolsy