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A quick way to understand who this helps, what it solves, and where it connects next.
Developers exploring JSON API responses and configs.
Using the json tree viewer without installing anything or signing up.
Capture json-tree-viewer intent with a fast, browser-side tool that runs 100% locally.
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
The JSON tree viewer turns any pasted JSON into a collapsible, color-coded tree so you can navigate deeply nested API responses and config files at a glance. Objects and arrays expand and collapse individually, and values are colored by type, strings, numbers, booleans, and null, to make structure obvious. Buttons let you expand or collapse the whole tree at once and copy a cleanly formatted, two-space-indented version. Invalid JSON produces a clear parse error rather than a blank screen, and everything is parsed locally in your browser so your data is never uploaded.
Short answers for the questions people usually have before trying a utility like this.
Yes. Every object and array node toggles independently, and expand-all and collapse-all buttons let you open or close the entire tree in one click.
The copy-formatted button places a pretty-printed, two-space-indented version of your JSON on the clipboard, ready to paste back into code or a document.
No. The viewer parses your JSON locally with the browser's native JSON.parse, so nothing is uploaded and your data stays on your device.
Every tool on Cleanor is free with no sign-up, no credits, and no limits. Files are processed privately in your browser. Looking for on-device phone cleanup and Premium features? That lives in the Cleanor app.
Paste JSON and explore it as a collapsible, color-coded tree. Expand or collapse branches, copy formatted output, and catch parse errors instantly, all in your browser.
Parsed locally in your browser.