Convert to JSON
Convert XLSX, CSV, XML, YAML to JSON online. Choose a file and download a genuine .json result. Fast, secure, and no sign-up required.
Drop a file to convert it to JSON
We'll detect the input format and show the right settings for a genuine .json result.
JSON is a structured text format widely used by APIs, applications, and development tools. This destination page brings every supported route to JSON together, so you can begin with the file you already have.
Rows, fields, headings, and supported value types are mapped into the JSON structure so the result remains practical to open and continue editing.
JSON opens in text editors, code editors, browsers, API clients, and development tools.
Choose a JSON Converter
Open a specific route when you already know your input format.
Frequently Asked Questions
How do I convert a file to JSON?
Choose a supported file on this page. Crest Convert detects its format and shows the matching JSON settings here. Review the available options, start the conversion, and download the finished .json file without leaving the page.
Which files can I convert to JSON?
This page supports 4 input formats, including XLSX, CSV, XML, and YAML. The available routes are listed below so you can also open a specific converter directly.
What is JSON best used for?
JSON is a structured text format widely used by APIs, applications, and development tools. This destination page brings every supported route to JSON together, so you can begin with the file you already have.
What is preserved when I convert to JSON?
Rows, fields, headings, and supported value types are mapped into the JSON structure so the result remains practical to open and continue editing.
Which applications can open JSON files?
JSON opens in text editors, code editors, browsers, API clients, and development tools.
Can I convert several files to JSON?
Yes. After Crest Convert identifies the source format, you can add more compatible files on this page, process the batch, and download the completed results individually or together when ZIP download is available.
Is converting files to JSON secure?
Yes. Browser conversions stay on your device. Files that require server processing are transferred over an encrypted connection, handled securely, and automatically deleted shortly after conversion. No account is required.
How do I convert a file to JSON?expand_more
Choose a supported file on this page. Crest Convert detects its format and shows the matching JSON settings here. Review the available options, start the conversion, and download the finished .json file without leaving the page.
Which files can I convert to JSON?expand_more
This page supports 4 input formats, including XLSX, CSV, XML, and YAML. The available routes are listed below so you can also open a specific converter directly.
What is JSON best used for?expand_more
JSON is a structured text format widely used by APIs, applications, and development tools. This destination page brings every supported route to JSON together, so you can begin with the file you already have.
What is preserved when I convert to JSON?expand_more
Rows, fields, headings, and supported value types are mapped into the JSON structure so the result remains practical to open and continue editing.
Which applications can open JSON files?expand_more
JSON opens in text editors, code editors, browsers, API clients, and development tools.
Can I convert several files to JSON?expand_more
Yes. After Crest Convert identifies the source format, you can add more compatible files on this page, process the batch, and download the completed results individually or together when ZIP download is available.
Is converting files to JSON secure?expand_more
Yes. Browser conversions stay on your device. Files that require server processing are transferred over an encrypted connection, handled securely, and automatically deleted shortly after conversion. No account is required.