JSON Viewer

Explore the tree.

Collapsible. Searchable. Colour-coded.

JSON Input
No upload
Works offline
No tracking

Need to explore large JSON files? The offline bundle handles unlimited files with no limits. $49 once.

Get Bundle →
// How it works

Three steps. Zero uploads.

01
Paste
Paste JSON or drop a .json file. It stays on your device.
02
Explore
Navigate the collapsible tree. Click to expand/collapse. Search by key or value.
03
Copy
Click any path to copy it. Nothing was ever uploaded.
// Why this is different

Your data never leaves your machine.

Most online JSON viewers upload your data to a server. Your JSON passes through systems you don't control.

fwip works differently. The viewer engine runs entirely in your browser. Your data is read from your device, processed on your CPU, and the result is saved back to your device. No server is involved. We literally cannot see your file.

No server processing

Everything runs on your device using WebAssembly. Your file never touches a network.

No account required

Drop a file. Get a result. No sign-up, no email, no password.

No subscription

Free in the browser. $99 once for the offline bundle. That's it. Forever.

Works offline

The desktop version works with no internet connection at all.

// Questions

Frequently asked.

How large a JSON file can this handle?▾
fwip handles JSON files up to several megabytes comfortably. Very deeply nested structures (100+ levels) may slow the initial render.
Can I search within the JSON?▾
Yes. The search bar filters the tree to show only nodes whose keys or values match your query.
Does this validate JSON?▾
Yes. If your JSON is invalid, fwip shows the parse error with the position of the problem.
Can I copy a specific path?▾
Yes. Click any node to see its full JSON path (like data.users[0].name). Click the path to copy it to your clipboard.
What about circular references?▾
JSON doesn't support circular references. If your data has them, stringify it first with a replacer function.
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