Your data stays as written
Numbers keep their own digits instead of passing through a double, and the ones a double would change get a warning. Duplicate names stay and get flagged. A repair is a list of changes you read first and apply on purpose.
Edit JSON as code or tree.
Paste, fix, and copy valid JSON. The document stays in your browser.
Code
Paste or type. The first error shows on its line.Tree
Nothing to show yet
Paste JSON in the code view, open a file, or load the example. The tree shows every value once the text parses.
Interoperability warnings
The document is valid JSON. Each line names something another parser may read differently, with the RFC 8259 section it rests on.
Repair proposal
Nothing is uploaded
The editor runs in your browser. Files open and download locally. There is no account, no analytics, no automatic save, no share link, and no third-party script.
RFC 8259, next to each warning
Validation follows RFC 8259, and every warning links the section it rests on. Copied pointers follow RFC 6901. The verdict covers syntax and interoperability, not your application's schema.