Structo
Open studio

Make JSON easier to understand.

Structo is a private JSON workspace: paste, validate, visualize, search and inspect complex JSON from one calm, fast interface. No accounts. No uploads.

Open the studio Try the live preview

validate · visualize · search · inspect · export

Live preview

Don't take our word for it — break some JSON.

This is the real workspace running below: the same Edit JSON sheet, view switcher and toolbar as the studio. Edit the sample, delete a comma, watch validation react.

Open studio
Valid
-user:{6 keys}
-orders:[2 items]
-meta:{4 keys}
id:u_1024
name:Jane Doe
email:jane.doe@example.com
verified:true
-profile:{4 keys}
-skills:[3 items]
city:Springfield
country:US
timezone:America/Chicago
-address:{2 keys}
line1:123 Main St
postcode:62701
skills:React
skills:Next.js
skills:TypeScript
id:ord_9001
status:delivered
total:2499.5
-items:[2 items]
sku:KB-60
name:Mechanical keyboard
qty:1
price:1999.5
sku:MS-PAD
name:Desk mat
qty:1
price:500
id:ord_9002
status:shipped
total:899
-items:[1 items]
sku:USB-C-HUB
name:USB-C hub
qty:1
price:899
page:1
perPage:20
hasMore:false
generatedAt:2026-09-22T10:00:00.000Z

Edit JSON

The visualization updates as you type.

Export:

Click a node to inspect its JSON path.

Stats949 B
48Nodes10Objects4Arrays22Strings10Numbers2Booleans0Nulls39Keys5Depth
This preview runs 100% in your browser, just like the full studio.

Features

Everything Phase 1 needs. Nothing it doesn't.

A complete validate → visualize → inspect → export loop, built client-side with React state, memoized derivations and debounced search.

Validation that explains itself
Line + column diagnostics with plain-language suggestions for missing commas, trailing commas, unclosed strings and more, not just raw parser errors.
Interactive graph view
An auto-laid-out node graph you can pan, zoom (Ctrl/Cmd + wheel) and drag to rearrange. Edges follow moved nodes, and dblclick resets one in place.
Interactive tree visualizer
Expand, collapse and click through nested objects and arrays. Type icons, key counts and array lengths keep deep documents readable.
Table view for arrays
Arrays of objects flip into a table with dynamic columns and truncation-safe cells. Anything else gets a clear note pointing you back to the tree.
Search across keys and values
Find anything in seconds with match counts and Enter / Shift+Enter navigation. Matches highlight everywhere: tree rows, graph cards and edges.
Instant statistics
Node counts by type, max depth, total keys and payload size, computed client-side the moment your JSON validates, shown full or compact.
Export views as PNG or PDF
Download whatever you are looking at: the whole graph diagram, or the full tree and table content, rendered in-browser and fitted onto A4 for PDF.
Sheet editor that stays out of the way
Edit JSON in a side sheet over the canvas with line numbers, error-line highlighting, go-to-error and shortcuts for validate, format and minify.
Keyboard-first navigation
Arrow keys expand and collapse the tree, Enter/Space activate nodes, Enter and Shift+Enter walk search results, and Escape clears the query.

How it works

From paste to insight in four steps.

  1. 01

    Add your JSON

    Paste into the Edit JSON sheet, drop a .json file anywhere, import a file or load an example. Malformed input is never destroyed while you type.

  2. 02

    Validate as you type

    Debounced client-side validation answers in milliseconds, and when it fails it tells you the line, the column and the likely fix.

  3. 03

    Explore three views

    Graph, Tree and Table render the same document. Switch with one click, search across keys and values, and select any node to reveal its JSONPath.

  4. 04

    Copy or export

    Take JSONPaths, values, or the document raw, formatted or minified, or download the view you are looking at as a PNG or an A4 PDF.

Structo

Bring your messiest JSON. Leave with clarity.

The studio is free, private and ready - paste your first document in seconds.

Open Structo Studio

FAQ

Questions, answered.

The short version: everything runs locally, nothing leaves your browser, and the studio handles real-world document sizes gracefully.