Private browser-based developer tool

Online JSON Viewer for Tree, Code, and Table Data

Explore JSON in an expandable tree, formatted code view, or a table when the data has a row-like structure. Search for keys and values, copy JSON paths, and inspect deeply nested objects without uploading the document.

The tree view makes object and array relationships easier to follow, while the table view is useful for arrays of similarly shaped objects. The original source remains available alongside the structured result.

Format and beautify JSON

Apply two, three, or four spaces or tabs, then copy or download clean JSON. Formatting changes whitespace without changing the represented data.

Validate and repair JSON

Find syntax errors with line and column details. Preview safe fixes for common mistakes before applying them to the document.

Explore and convert data

Inspect objects and arrays as a searchable tree or table, compare documents by JSON path, or convert JSON to YAML, XML, and CSV.

JSON formatter questions

Is JSONFormatView free?

Yes. JSONFormatView is a free online JSON formatter, validator, viewer, comparison, repair, minification, and conversion tool.

Does JSONFormatView upload my JSON?

No. Formatting, validation, repair, comparison, viewing, and conversion run locally in your browser.

What makes JSON invalid?

Common causes include trailing commas, single-quoted strings, unquoted property names, comments, missing brackets, and incorrectly escaped characters.