JSON を CSV に変換

Free online JSON to CSV converter. Fast, secure, no signup required.

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Accepted: JSON files · Max 100 MB per file

json csv

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Need to convert JSON to CSV? MegaConvert makes it easy. Upload your JavaScript Object Notation (JSON) file and get a Comma-Separated Values (CSV) file in seconds — no software to install, no signup required. Whether you need this conversion for data analysis / web development, our online converter handles it instantly. Free for files up to 25MB, with support for larger files up to 2GB.

How to Convert JSON to CSV Online

1
Upload your JSON file
Click the upload area or drag and drop your JSON file. Files up to 25MB are free. Larger files are supported with pay-per-use.
2
Choose CSV as output format
CSV is automatically selected on this page. You can adjust conversion settings if needed.
3
Click Convert
Hit the Convert button to start processing. Your file will be converted using our high-performance servers.
4
Download your CSV file
Once conversion is complete, click Download to save your new CSV file. Free files are available for 1 hour.

Why Convert JSON to CSV?

**Universal compatibility** — CSV works on virtually every device, operating system, and application without additional software.
**Reduce file size** — Converting between formats can significantly reduce file size, making files easier to share via email or cloud storage.
**Software requirements** — Your software or platform may require CSV format specifically. Converting ensures full compatibility.

JSON vs CSV — Format Comparison

Feature	JSON	CSV
Full Name	JavaScript Object Notation	Comma-Separated Values
Developer	Douglas Crockford	N/A
First Released	2001	1972
Category	Web	Spreadsheet
Extension	.json	.csv
MIME Type	application/json	text/csv

Nested data structures may flatten when converting to CSV.

About JSON Format

Lightweight data interchange format that is easy for humans and machines to read and write.

Full name: JavaScript Object Notation

Developer: Douglas Crockford (2001)

About CSV Format

Simple text format for tabular data where values are separated by commas.

Full name: Comma-Separated Values

Developer: N/A (1972)

よくある質問

Upload your JSON file to MegaConvert.io, select CSV as the output format, and click Convert. Your converted file will be ready to download in seconds. No software installation required.

Yes! Files up to 25MB can be converted for free, up to 3 times per day. For larger files, pay-per-use pricing starts at just $2 for files up to 100MB.

Absolutely. All uploaded files are encrypted in transit (HTTPS), scanned for viruses, and automatically deleted after conversion. We never share or access your files.

Free users can convert files up to 25MB. Pay-per-use supports files up to 2GB. Subscribers get up to 2GB with priority processing.

Lightweight data interchange format that is easy for humans and machines to read and write. Developer: Douglas Crockford (2001).

Simple text format for tabular data where values are separated by commas. Developer: N/A (1972).