An offline playground for HTML, CSS and JavaScript, with live preview and responsive testing.
JSON Hub
A JSON formatter, validator and viewer that runs on your PC, so your data is never uploaded.
About this app
Paste or open JSON, see every error by line, browse it as a table or tree, and convert it to CSV, XML or YAML in one click. Formatting, validation and conversion all run locally, in a native Windows app with a full code editor.
- Format and validate JSON, with every syntax error listed by line and column
- Convert to CSV, TSV, XML, YAML, TOML, HTML, Markdown and more in one click
- Table View turns arrays of objects into a grid you can sort, edit and search
- Validate against JSON Schema, with 1,400+ public schemas matched to your files
- Generate model classes in C#, Java, TypeScript, Python and six more languages
- Light, dark or system theme in a native Windows 11 design