Validator & Viewer

    Paste your JSON below to validate, format and visualize.

    Input Editor
    Tree Viewer

    Enter valid JSON in the editor to see the tree structure.

    Paste any JSON string to instantly validate its syntax, see where errors are, and explore the structure as an interactive tree. Also prettify (format with indentation) or minify (remove whitespace) in one click.

    Frequently Asked Questions

    Is it the same as jsonlint.com?

    Same core purpose — validate and format JSON — but with an added tree viewer for exploring nested objects and arrays.

    Does it send my data anywhere?

    No. All processing happens in your browser; your JSON never leaves your device.

    What's the size limit?

    There's no hard limit, but very large JSON files (10 MB+) may slow down the tree view.