Flatten a deeply nested JSON object into a single level map where each key is a dot notation path to a leaf value. This is exactly how tools like i18n translation files, feature flags and property config are often stored, and it makes deep structures far easier to search, diff and edit. This tool walks your JSON and joins nested object keys with dots, while array indices are written in bracket notation so paths stay unambiguous. Leaf values keep their real type, so numbers, booleans and null are preserved rather than stringified. Empty objects and empty arrays are represented explicitly so nothing silently disappears. Paste your nested JSON, click flatten, and copy the flat result. Everything runs locally in your browser, so private config never touches a server.
Flatten a deeply nested JSON object into a single level map where each key is a dot notation path to a leaf value. This is exactly how tools like i18n translation files, feature flags and property config are often stored, and it makes deep structures far easier to search, diff and edit.
Yes. JSON Flatten is completely free, with no sign-up and no usage limits.
Yes. JSON Flatten runs in any modern web browser. There is nothing to download or install.
Yes. JSON Flatten runs entirely on your device in your browser, so nothing you enter is uploaded to a server.