About Fmt Hut

Fmt Hut is a free data format converter for JSON, CSV, YAML and XML that runs entirely in your browser.

What you can do on Fmt Hut

• JSON and Table – View a JSON array as a table and turn a table back into JSON or CSV.
• CSV Viewer – Open a CSV file as a readable table and export it as JSON.
• YAML and JSON – Convert configuration data between YAML and JSON.
• JSON and XML – Convert data between JSON and XML in either direction.

Open the Data Format Converter

How it works

• Free to use: no account, sign-up or payment is required.
• Files and text you paste or drop in are parsed and converted locally in your browser. They are not uploaded to our servers.
• Works in modern desktop and mobile browsers, with nothing to install.
• The interface is available in English and Chinese.
• The site is supported by advertising, which keeps every tool free.

Who runs Fmt Hut

Behind Fmt Hut is one independent developer who builds lightweight, privacy-conscious utilities. There is no sales team and no data business – just focused tools that stay quick and simple to use.

Why we built it

Data moves between systems in different shapes: JSON from APIs, CSV from spreadsheets, YAML in configuration and XML in older integrations. Fmt Hut converts between them in the browser, so you can reshape a file without writing a script or uploading data you may not be allowed to share.

Feedback

Suggestions and bug reports directly shape what gets improved next. Send yours through the Contact page.