Convert CSV to JSON Online

Convert Comma-Separated Values (.csv) files to JavaScript Object Notation (.json) format online for free. Fast, secure, and no sign-up required. Your files are automatically deleted within 1 hour.

Free online csv to json converter — no software needed. Instantly change, transform, and export your files in seconds.

CSVJSON

Drag & drop your file here

or browse to select — accepts .csv (max 10MB)

How to Convert CSV to JSON Online

1. Upload Your File

Select or drag your .csv file into the converter

2. Convert Instantly

Your file is converted from .csv to .json in seconds

3. Download Result

Download your converted .json file to any device

Best Free CSV to JSON Converter

Lightning Fast Conversion

Convert .csv to .json in seconds. No waiting, no queues — instant processing.

100% Secure & Private

All files are encrypted in transit via HTTPS and auto-deleted within 1 hour. Your data stays private.

Works on Any Device

Browser-based converter — works on Windows, Mac, Linux, iOS, Android, and Chromebook. No installation needed.

No Sign-Up Required

Start converting immediately. No registration, no email, no watermarks on your converted files.

When to Convert CSV to JSON

Sharing & collaboration

Send csv files to people who only have json-compatible software, without losing layout or formatting.

Cross-platform compatibility

Open and edit your csv file on devices that don't support it natively by converting to json once.

CSV vs JSON — Why Convert?

CSV (CSV)

Standard CSV file format
Widely used across platforms
CSV files may have specific features
May require specific software to open

JSON (JSON)

JSON format for broader compatibility
Easy to share and distribute
Supported by many applications
Ideal for your target workflow

CSV to JSON — Frequently Asked Questions

Is CSV to JSON conversion free?

Yes! Reformat offers free CSV to JSON conversion. Free users get 3 conversions per day. Upgrade to Pro for unlimited conversions.

How do I convert .csv to .json?

Simply upload your CSV file, click Convert, and download your JSON file. The entire process takes just seconds.

What is the maximum file size?

Free users can convert files up to 10MB. Pro users get up to 100MB, and Business users get up to 500MB.

Is my file safe?

Absolutely. All files are processed securely and automatically deleted from our servers within 1 hour. We never access or share your data.

Can I convert multiple files at once?

With a Pro or Business account you can batch convert multiple files. Free users can convert one file at a time.

Is the CSV to JSON converter free?

Yes. Anonymous users get 5 free conversions per day; signed-in users get 10/day plus 2 AI uses. Pro removes the daily limit and raises the file-size cap.

What is the maximum file size for CSV to JSON?

Free users can upload files up to 10MB. Pro raises this to 100MB and Business to 500MB.

Is it safe to upload my csv file?

Files are uploaded over HTTPS, processed on our servers, and deleted within 1 hour. We do not read, share, or train on file contents.