JSON Viewer
Paste or upload JSON and explore it as a collapsible, color-coded tree. Expand and collapse nodes, search keys and values, copy any path, and format or minify — all in your browser.
Why a JSON Viewer?
- Read deeply nested API responses at a glance
- Collapse noise and focus on the branch you need
- Copy the exact JSON path to any value
- Spot the line that breaks parsing instantly
- Format or minify without a separate tool
What It Handles
- Objects, arrays, and nested mixtures of both
- Strings, numbers, booleans, and null — color coded
- Root-level arrays and primitives, not just objects
- Paste, drag-and-drop, or file upload
- Large documents up to ~15 MB
Privacy & Speed
- 100% client-side — nothing is uploaded
- Safe for API tokens, PII, and production data
- No sign-up, no rate limits, no API keys
- Instant — runs entirely in your browser
- Free and open to use
About the JSON Viewer
The JSON Viewer turns raw JSON text into an interactive, collapsible tree. Instead of
scrolling through thousands of lines of indented text, you get a color-coded structure where every object
and array can be expanded or collapsed independently. Keys, strings, numbers, booleans, and null are each styled differently so the shape of your data
is obvious at a glance.
Everything runs in your browser. Your JSON — including API tokens, customer records, and any other sensitive values — is never sent to a server, which makes the tool safe for production payloads, exported data, and anything you can't share externally.
How to Use the JSON Viewer
- Paste your JSON into the JSON Input box on the left, drop a
.jsonfile onto it, or click Upload to pick a file. - Watch the Status / Keys / Depth / Size stats update live, and see the tree render on the right.
- Click any object or array row (or the ▾ caret) to expand or collapse that branch. Use Expand all / Collapse all to control the whole tree.
- Hover a row to reveal path and copy buttons — copy the JSON path to a value or copy the value itself.
- Use the Search box to highlight rows whose key or value matches your query.
- Click Format to pretty-print the input or Minify to compact it, and Copy JSON to copy the formatted document.
- Click Sample to load a demo document, or Clear to start fresh.
Common Use Cases
- API debugging — paste a response body and collapse the parts you don't care about to focus on the field you're investigating.
- Config inspection — explore
package.json,tsconfig.json, or any nested config without losing your place. - Finding JSON paths — copy the exact path (like
$.owner.roles[0]) to use in JSONPath, jq, or your code. - Validating JSON — instantly see whether a document parses and read the exact error message when it doesn't.
- Reformatting — turn a minified one-liner into readable, indented JSON, or compact a verbose document back down.
- Reviewing data dumps — browse exports, webhook payloads, and database rows that ship as JSON.
Frequently Asked Questions
Is my JSON sent to a server?
No. Parsing and rendering happen entirely in your browser using JavaScript. Your JSON — including any tokens, keys, or personal data — is never uploaded, so the tool is safe to use with production and confidential data.
What's the difference between this and a JSON formatter?
A formatter only re-indents text. This viewer renders an interactive tree you can expand, collapse, search, and copy paths from — and it still includes Format and Minify buttons when you just want clean text.
How do I copy a value's path?
Hover over any row and click path. It copies a dot/bracket path like $.releases[1].version, which works with most JSONPath and jq-style query tools.
Can it view a top-level array or a single value?
Yes. Any valid JSON works — an array, an object, or even a bare string or number at the root. The tree adapts to whatever structure you paste.
What happens with invalid JSON?
The status flips to Invalid and the tree panel shows the parser's error message, so you can find and fix the problem (a trailing comma, a missing quote, a stray bracket) quickly.
How big a file can it handle?
Documents up to about 15 MB work well. Very large files create tens of thousands of DOM nodes, so deep trees start collapsed below a certain depth to keep rendering responsive — expand the branch you need.
Does search filter or just highlight?
Search highlights matching rows (key or value, case-insensitive) so you keep the surrounding structure for context. Expand the relevant branches, then scan for the highlighted rows.
Will it change my numbers or key order?
The viewer uses the browser's native JSON parser, so object key order is preserved as parsed and numbers are shown as JavaScript reads them. Note that extremely large integers beyond JavaScript's safe range can lose precision — a limitation of all browser-based JSON tools.