To convert CSV to JSON, choose your CSV data files above, adjust the options if needed and press "Convert to JSON". The JSON downloads instantly: free, with no sign-up, and the file never leaves your device.
About the CSV to JSON Converter
Need to turn a CSV file into JSON? This free converter changes CSV data files into JSON in a few seconds, right in your browser. People usually convert because CSV has no formatting, no sheets and no data types, while JSON gives you structured JSON. JSON files open in every programming language, VS Code, Postman, browsers and databases.
Spreadsheets are read and written with SheetJS, the open-source spreadsheet engine used by thousands of data apps, so every sheet, row and value is handled accurately. Because everything happens on your own device, your data files are never uploaded, stored or seen by anyone else, which makes it safe for customer lists, salary sheets, GST data and API exports.
What to expect: the delimiter and text encoding are detected automatically; formulas are exported as their calculated values, while text such as PIN codes and phone numbers with leading zeros stays intact; the first row is used as column names, which you can switch off.
How to use the CSV to JSON Converter
- Click "Choose files" or drag your CSV data files onto the box. You can add several at once.
- Choose whether the first row holds column names and whether to convert all sheets or only the first.
- Press "Convert to JSON". The conversion runs on your device and shows its progress.
- Download each JSON file, or use "Download all (ZIP)" when you converted several.
- Open the result in every programming language or VS Code to check it; your original CSV is never changed.
Tips & benchmarks
- The JSON is pretty-printed with two-space indentation and numbers and booleans keep their types.
- Merged cells are unmerged and their value is kept in the first cell, which keeps the data easy to filter and import.
- Keep the file name simple (letters, numbers and hyphens) if you plan to upload the JSON to a website or government portal.
Frequently asked questions
How do I convert CSV to JSON?
Click "Choose files", select your CSV data files, adjust the options if you want, and press "Convert to JSON". The JSON downloads immediately; with several files you can download everything as one ZIP.
Is this CSV to JSON converter free and safe?
Yes. It is completely free, with no sign-up, no daily limit and no watermark. The conversion runs inside your browser, so your data files never leave your phone or computer and nothing is stored on News Appite's servers.
Are formulas, formatting and all sheets kept?
Every sheet is converted (or only the first, if you choose). Formulas are exported as their current values, and cell colours and fonts are not carried over because formats such as CSV, JSON and SQL cannot store them.
Can I convert several CSV files at once?
Yes. Add as many CSV files as you like; they are converted one after another and you can download them individually or together as a ZIP.
Does it work on iPhone, Android and Mac?
Yes. The converter works in any modern browser, including Chrome, Safari, Edge and Firefox, on Android, iPhone, iPad, Windows, macOS and Linux. No app is needed.
What is the difference between CSV and JSON?
CSV (Comma-Separated Values) is a plain-text table best suited to importing data into databases, CRMs, Tally, mailing tools and Python or R. JSON (JavaScript Object Notation) is a structured data (text) best suited to APIs, web and mobile apps, configuration and MongoDB or Firebase data.
Is there a file size limit?
There is no upload limit, because nothing is uploaded. The practical limit is your device's memory: files of a few hundred megabytes work on most computers, and phones handle smaller files comfortably.
How do I convert CSV to JSON in Excel?
Open the file in Excel via Data → From Text/CSV (choose UTF-8 for Hindi or ₹), then use File → Save As. This converter does it instantly and keeps leading zeros such as PIN codes.
How do I convert CSV to JSON in Python?
With pandas: df = pd.read_csv('input.csv'), then df.to_json('output.json', orient='records', indent=2). If you just need the file, this converter does it in the browser without writing any code.
CSV ko JSON kaise kare?
Is page par "Choose files" dabaiye, apni CSV file chuniye aur "Convert to JSON" par click kijiye. JSON file turant download ho jaati hai. Ye bilkul free hai, sign-up nahi chahiye, aur aapki file kisi server par upload nahi hoti.
CSV vs JSON: format comparison
| CSV | JSON | |
|---|---|---|
| Full name | Comma-Separated Values | JavaScript Object Notation |
| Type | Plain-text table | Structured data (text) |
| Created by | Described in RFC 4180 (2005) | Douglas Crockford, early 2000s (RFC 8259) |
| Compression | None (text) | None (text) |
| File extension | .csv | .json |
| MIME type | text/csv | application/json |
| Best for | Importing data into databases, CRMs, Tally, mailing tools and Python or R | APIs, web and mobile apps, configuration and MongoDB or Firebase data |
| Opens in | Excel, Google Sheets, Notepad, MySQL, pandas and every CRM | every programming language, VS Code, Postman, browsers and databases |
What is a CSV file?
CSV stores a single table as plain text, one row per line with values separated by commas. Every spreadsheet, database, CRM and programming language can import it, which makes it the universal format for moving data.
What is a JSON file?
JSON is the data format of the modern web: almost every API, app configuration and NoSQL database speaks it. It represents objects, arrays, numbers and text in a compact, human-readable way.
Need it the other way round? Use the JSON to CSV Converter.
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All tools on News Appite are free to use for personal and commercial work. Calculations and file conversions are performed in your browser; the redirect and cache checkers make a single request to the URL you enter and store nothing. Found a bug or want a new tool? Tell us.