Convert to JSON, Free
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How to convert to JSON
JSON (JavaScript Object Notation) is the standard data interchange format for web APIs, configuration files, and data storage. It is human-readable, lightweight, and supported natively in every modern programming language. Converting other data formats to JSON is a common step when integrating data from spreadsheets, CSV exports, XML systems, or YAML configuration files into a web application or API.
BoltConverter converts CSV, XML, YAML, and other structured data formats to JSON on its servers. The converter handles the structural mapping from each source format's hierarchy or table structure to equivalent JSON objects and arrays.
Upload your source file
Click the upload area or drag your CSV, XML, YAML, or other data file onto the converter.
Conversion runs on the server
BoltConverter parses the source format and maps the structure to JSON.
Review the JSON output
The converted JSON appears. Check that the structure and values look correct.
Download or copy the JSON
Download the .json file or copy the JSON text for use in your application.
Frequently asked questions
Which formats can be converted to JSON?
CSV, XML, YAML, TOML, and plain text tabular data can all be converted to JSON. Select the specific conversion page for the source format you are working with.
Will nested structures be preserved?
Yes. XML and YAML nesting maps to nested JSON objects. CSV, being flat, maps to an array of objects.
Is the output pretty-printed or minified?
The output is formatted with indentation for readability. If you need minified JSON, you can pass the output through a JSON minifier.
Is my data kept private?
Your file is sent over HTTPS and deleted from the server immediately after conversion. BoltConverter does not retain your data.
What encoding does the JSON output use?
All JSON output is UTF-8 encoded, which is the standard encoding for JSON as defined in RFC 8259.