CSV to JSON

Turn rows into a clean JSON array, no spreadsheet needed.

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Drop a file here

CSV or TSV file · read on your device, never uploaded

The separator is worked out from the file. Numbers and true/false become real JSON values, while codes with leading zeros and IDs too long to survive the trip stay as text.

Processed entirely on your device. Nothing was uploaded.

How to Convert CSV to JSON Online

Turns rows into a clean JSON array without going through a spreadsheet. Quoted fields containing commas are handled correctly, which is the thing hand-written CSV parsers get wrong and the reason an address column so often splits into two.

No software to install Free Works on any device

Step-by-Step Guide to Convert CSV to JSON

1

1. Drop in your CSV file
2

2. Confirm the first row is a header
3

3. Press Convert to JSON

No .csv file to hand? Download a sample CSV file (635 B) and try it.

Try it now

What is CSV to JSON Conversion?

CSV files

.CSV .TSV

Turn rows into a clean JSON array, no spreadsheet needed.

See an Example

Before

name,city
Ada,London
Grace,Oslo

After

[
  { "name": "Ada", "city": "London" },
  { "name": "Grace", "city": "Oslo" }
]

Why Use Excel and CSV Tools?

Data rarely arrives in the shape you need: one colleague sends CSV, a website gives JSON and the system wants Excel. These tools convert, merge, split and clean sheets so the rows are ready to use.

“Clean data first, and the analysis gets much easier.”

Any sheet into any format
Many workbooks in one
Columns picked and sorted
Help writing formulas

Duplicate rows removed
Large sheets split into parts
Tables ready for websites
Customer lists kept private

Popular Uses for Spreadsheet Converters

Spreadsheet chores are the same in every office, and these handle the dull ones.

Cleaning contact lists Remove duplicate rows from a customer or student list before sending a mailer.
Combining monthly sheets Join twelve monthly Excel files into one workbook for the yearly total.
Data for web apps Turn a sheet of products into JSON for a website or mobile app.
Opening exported JSON Turn a JSON or XML export from an online system into a readable Excel sheet.
Sharing some rows Split a large file so each branch or teacher gets only their own rows.
Tables for web pages Convert a CSV into an HTML or Markdown table to paste into a blog post.
Picking columns Keep only the name, phone and email columns from a long export.
Filtering and sorting Show only the rows for one city or date range, then sort them.

What the CSV to JSON Converter Does

Accepts CSV, TSV

Reads CSV and writes JSON

Cell types are carried across — a number stays a number and a date stays a date

Quoting, delimiters and encoding follow RFC 4180, so Excel opens the result without mangling it

Why Use ToolXkit for CSV to JSON?

Your files stay with you

Everything runs inside your browser. Nothing you open or type is uploaded to a server.

Data Tools for Different Users

Small businesses

Tidy stock lists and customer records without buying extra software.

Teachers

Split class marks by section and remove repeated student entries.

Data analysts

Switch quickly between CSV, Excel, JSON and XML while preparing a dataset.

Developers

Turn spreadsheets from clients into JSON or YAML that code can read.

Marketing teams

Clean and merge lead lists gathered from different forms and events.

HR teams

Filter employee lists and share only the columns each manager needs.

Best Times to Clean Up a Spreadsheet

These tools earn their place when you are:

Importing contacts into a new system
Preparing a mailing list
Merging reports from several branches
Handing data to a developer
Publishing a table online
Opening a file Excel will not read
Splitting a sheet for different teams
Checking a list for repeats

Frequently Asked Questions

Answers to common questions about this tool.

Do I get an array of objects or an array of arrays?

An array of objects, with the first row taken as the keys — which is what almost every API expects. If your file has no header row, add one before converting, or the first row of data will be consumed as the field names.

Why are my numbers strings in the output?

CSV has no types; every cell is text until something decides otherwise. Guessing wrong is worse than not guessing — a leading-zero product code turned into a number is silently corrupted data — so values stay as written unless you ask for conversion.

Do I need Excel installed to use CSV to JSON?

No. The spreadsheet is read by the page itself, so it works on computers without Microsoft Office, and on phones and tablets too. The result downloads in the format you picked.

Are my spreadsheets uploaded?

No. Customer lists, salary sheets and sales figures are processed inside your browser and never sent to a server. When you close the tab, the data is gone from the page.

Can CSV to JSON handle files with thousands of rows?

Usually, yes. Sheets with thousands of rows work well on most devices. Very large files depend on your computer’s memory, so a laptop copes better than an older phone.

Will formulas survive the conversion?

Formats like CSV, JSON and XML store values, not formulas, so a converted file holds the calculated results. Keep your original workbook if you will need the formulas again.

Why do dates or leading zeros look wrong afterwards?

Spreadsheet programs sometimes guess that a phone number or ID is a number and drop its leading zeros, or read a date in the wrong order. Check those columns, and format them as text in Excel if needed.

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