Advanced JSON Studio

🎉 Launch Offer — 50% Off Pro for the First 500 Users

To celebrate the Advanced JSOn Studio launch, the first 500 users get 50% off a Pro licence. Use the code below at checkout:

Coupon code: XBKF1XMP

👉 Get Pro licence →

Limited to the first 500 — offer ends once the cap is reached.

Advanced JSON Studio v1.0.4

The Intelligent JSON Workspace for VS Code

Advanced JSON Studio is a complete engineering environment built right into your VS Code sidebar. Designed to handle everything from massive API responses to broken configuration files — it's the last JSON tool you'll ever need.

Parse Pretty-Print Tree-View Graph-View Minify Sort-Keys YAML XML TOML Properties CBOR BSON Flatten Unflatten Base64 CSV-Table Schema-Inference Schema-Validator JSONPath JMESPath JWT-Decode JWT-Verify Diff HTTP-Client Dummy-JSON Code-Gen Session-Tabs Persistence Open-In-Editor Right-Click-Generate Save-File GraphQL-Format GraphQL-to-JSON

🚀 Features

🧠 Intelligent Parsing & Repair

• Parse any format — paste JSON, JSON5, YAML, XML, TOML, Properties, JWT, CBOR, BSON, or Base64-encoded JSON and the parser detects it automatically
• Auto-repair — malformed JSON is repaired automatically using built-in heuristics (missing quotes, trailing commas, unquoted keys, and more)
• Format detection — the detected format is shown as a badge in the toolbar
• ⚡ Repaired badge — a visible indicator appears when the input was automatically repaired
• Ctrl+Enter to parse, or click the Parse button

🎨 View Tab

• Pretty Print — clean, indented JSON with full syntax highlighting (keys, strings, numbers, booleans, null, punctuation)
• Tree View — collapsible/expandable tree navigation for complex nested structures
• Graph View — visual node-graph of your JSON structure; pan and zoom to explore large datasets

🔄 Convert Tab

• Minify — collapse JSON to a single line
• YAML — convert JSON to YAML with syntax highlighting
• XML — convert JSON to XML
• TOML — convert JSON to TOML (arrays of objects use correct [[table]] syntax)
• Properties — convert JSON to .properties key-value format
• CBOR — convert JSON to CBOR binary (hex dump)
• BSON — convert JSON to BSON binary (hex dump)
• Flatten — expand nested JSON into dot-notation flat key–value pairs (e.g. user.address.city)
• Unflatten — rebuild a nested JSON object from flat dot-notation keys
• Base64 Encode — encode the current JSON to a Base64 string
• CSV Table — convert JSON arrays to a sortable, scrollable table view

🔍 Analyze Tab

• JSON Schema — infer a JSON Schema from your JSON structure automatically
• Schema Validator — validate your JSON against a JSON Schema; errors shown with path and message
• Query (JSONPath / JMESPath) — query your JSON with either expression language; inline help with syntax reference and examples
• JWT — decode JWT tokens (header, payload, signature); verify HMAC (HS256/384/512) signatures with a secret key

🛠️ Tool Buttons

• Diff — compare two JSON documents side-by-side; added/removed lines highlighted in green/red with a change summary
• HTTP Client — full HTTP client with GET, POST, PUT, PATCH, DELETE; custom headers; request body; cURL command parser
• Dummy JSON — generate realistic fake JSON for testing; choose object or array, property count, nesting depth, and array size
• Code Gen — generate typed models from JSON in 12 languages locally (TypeScript, JavaScript, Python, Kotlin, Swift, Go, Rust, C#, Java, C++, Dart, JSON Schema); save directly to your project

⚡ Toolbar Actions

• 📌 Pin — pin the current input so it is restored exactly on next open
• Clear — wipe input and output
• Copy — copy the active output tab's content to clipboard
• ⇅ Sort — sort all JSON keys alphabetically (recursive)
• ⧉ Open — open the full Advanced JSON Studio panel in an editor column for more screen space
• 💾 Save — save the current output to a file
• ⚙ Settings — manage your Pro licence; activate, deactivate, or get a new licence

🗂️ Session Tabs (up to 10)

• Create up to 10 independent sessions — each tab has its own input, parse results, active output tab, and sort state
• Double-click a tab label to rename it inline
• × close button on each tab; the last tab is protected from closing
• All sessions are automatically saved and restored across VS Code restarts — your work is never lost
• The active session and all tab labels are preserved across restarts

💾 Input Persistence

• Every time you parse, your input is automatically saved to local storage
• Use the 📌 Pin button to explicitly save the current input for the next session
• On next open, your input is restored and automatically re-parsed

◈ GraphQL Studio

Sessions now support a dedicated GraphQL mode alongside JSON. When you create a tab, you can switch it to GraphQL mode to get a purpose-built workspace:

• Format — parse and pretty-print any GraphQL SDL or query document (powered by the official graphql parser)
• Convert to JSON — convert a GraphQL SDL / query to its JSON AST representation; output is sent directly to the main JSON parser
• The GQL toolbar uses the GraphQL logo badge and a Format primary button (replaces Parse) for discoverability

🖱️ Right-Click: Generate Code in Folder

• Right-click any folder in the VS Code Explorer → "Generate Code from JSON"
• Opens a dedicated panel with a syntax-highlighted JSON editor, language selector, and type name field
• 📂 Load File button loads a JSON file from disk directly into the editor
• ⇌ Format button pretty-prints the JSON in-place
• Click ⚡ Generate & Save — the generated file (e.g. User.ts, Order.py) is written directly into the right-clicked folder
• Supports all 12 languages; file extension is set automatically

🔗 Parse Selection from Editor

• Select any JSON text in any editor file → right-click → "Parse Selection in Advanced JSON Studio"
• The selected text is sent directly to the parser and focused in the sidebar

Important: Advanced JSON Studio uses a Freemium Model

Advanced JSON Studio is a professional-grade tool built and maintained by a solo developer. To keep it actively maintained, fast, and full of features, it uses a freemium model.

What is Free?

The essentials are always free:

• Core JSON parsing, pretty-printing, and validation
• Tree view navigation
• Basic format detection and repair

What is Pro?

Advanced and specialised features require a Pro licence:

• Format conversions (YAML, XML, TOML, Properties, CBOR, BSON, Flatten, Base64, CSV)
• Query engine (JSONPath / JMESPath)
• JWT decode and verify
• JSON Diff, HTTP Client, Dummy JSON Generator
• Schema inference and Schema Validator
• Local code generation (12 languages)
• Save output to file

A Generous Daily Allowance

Every Pro feature includes a daily free usage limit — you can try every feature every day without a licence. Access is gently limited once the daily threshold is met, not hard-blocked.

👉 Get a Pro licence →

— Godwin

🔒 Pro Licence

Activate your Pro licence from the ⚙ Settings panel (gear icon in the toolbar):

1. Click ⚙ in the top-right of the toolbar
2. Paste your licence key into the input field
3. Click Activate

Your licence is validated against Polar.sh and the key is stored securely in your OS keychain. Once activated, all Pro features are immediately unlocked with no daily limits.

👉 Get a Pro licence →

To deactivate (e.g. to move to a new machine), click Deactivate in the Settings panel. This removes the key from your keychain immediately.

🔒 Privacy — Your Data Never Leaves Your Machine

Advanced JSON Studio is built privacy-first. No JSON data is ever sent to any server.

How your licence key is stored

Your licence key is stored exclusively in your operating system's secure keychain (macOS Keychain, Windows Credential Manager, Linux Secret Service). It is never written to a plain text file, never logged, and never included in any telemetry.

📦 Installation

From VS Code Marketplace:

1. Open VS Code Or Any Fork of it
2. Press Ctrl+Shift+X to open Extensions
3. Search for "Advanced JSON Studio"
4. Click Install

From VSIX (manual):

1. Download the latest .vsix from the Releases page
2. Open VS Code → Extensions (Ctrl+Shift+X)
3. Click ··· → Install from VSIX…
4. Select the downloaded file

Compatible editors:

Advanced JSON Studio is compatible with VS Code 1.80.0 and above, including popular forks:

• Cursor
• Windsurf
• Kiro
• Positron

🖥️ Usage

Once installed, click the Advanced JSON Studio icon in the Activity Bar (left sidebar) to open the panel.

Quick start:

1. Paste any JSON (or YAML, XML, TOML, JWT…) into the input area
2. Press Ctrl+Enter or click Parse
3. Switch output tabs using the View, Convert, Analyze dropdowns or the tool buttons below

⌨️ Keyboard Shortcuts

🆓 Free vs Pro

🆕 Changelog

v1.0.3

• GraphQL Studio — sessions now support a dedicated GraphQL mode alongside JSON; switch any tab to GQL mode to get a purpose-built workspace
• GQL Format — parse and pretty-print any GraphQL SDL or query document using the official graphql library
• GQL Convert to JSON — convert a GraphQL SDL / query to its JSON AST representation; the output can be sent straight to the JSON parser
• Session tab scrolling — the session tab bar now wraps in a scrollable container so many open tabs stay reachable without overflowing the sidebar
• Toolbar icon refresh — toolbar action buttons now use compact Unicode symbols (✕ Clear, ⎘ Copy, ⇅ Sort, ⧉ Open) for a cleaner look at narrow widths

v1.0.2

• Floating Save — the save action now floats over the output area and appears only for downloadable tabs (Pretty, Minify, YAML, XML, TOML, CBOR, BSON, CSV, Schema, Code Gen, etc.)
• Open in Editor — focused layout — opening the panel in the editor column now hides the session tab bar and the Pin / Open / Settings buttons; you get a full-size view without the UI that only belongs in the sidebar
• Pin Input — visual toggle — the 📌 Pin button now highlights when active, restores its pinned state on reopen, and clicking it again unpins
• Tooltips — smarter positioning — custom tooltips are now anchored to the hovered element and clamp to the viewport, so they stay fully visible even in a narrow VS Code sidebar
• Clear & Session switch — clearing the input or switching session tabs now reliably wipes every output panel; a session with unparsed input is now re-parsed on switch so stale data from another session can never leak in
• HTTP Client — risk warning — sending to localhost / private IPs / .local / .internal hosts now shows an inline warning banner with Proceed / Cancel and a "don't warn again this session" option
• Security — ReDoS hardening — JSON syntax highlighter rewritten as a linear O(n) tokenizer; the previous regex could backtrack on crafted input

v1.0.1

• Graph — Open in Editor — graph now opens as a real VS Code editor tab with full pan, zoom, drag, arrowhead edges, and node tooltips
• Graph — arrowhead edges & tooltips — edges now draw with directional arrowheads; hovering a node shows key, type, and value in a tooltip
• Settings — three-tab panel — Settings is now split into General, Privacy, and License tabs
• Settings — indent size — configurable indent size (2 / 4 / 8 spaces) in General tab, persisted across restarts
• Analytics — anonymous usage analytics (opt-out toggle in Privacy tab); no JSON data ever sent
• HTTP Client — "→ Use as Input" button sends response body to the main parser
• HTTP Client — input bar no longer disappears after a response loads (layout fix)
• JWT — invalid tokens now show "This is not a valid JWT token." instead of attempting to decode
• Session tabs — active tab selection now correctly restored after VS Code restart
• Tooltips — every toolbar button, dropdown item, and action button now shows a custom tooltip on hover
• Code Gen — fully local via quicktype-core (no network call)

v1.0.0

• Initial VS Code release
• Full parity with the IntelliJ Advanced JSON Studio feature set
• Session Tabs — up to 10 independent sessions with full persistence across restarts
• Local Code Generation — all 12 languages powered by quicktype-core — no network required
• Right-click Generate Code — context menu on any folder opens a syntax-highlighted JSON editor panel; generated file written directly into the folder
• Input persistence — auto-saved on every parse; restored on next open
• ⚙ Settings panel — slide-in licence management with Activate / Deactivate
• OS Keychain storage — licence key stored in macOS Keychain / Windows Credential Manager / Linux Secret Service
• Compatible with VS Code 1.80+ including Cursor, Windsurf, Kiro, and Positron

❤️ Support

If Advanced JSON Studio saves you time, consider supporting its development:

☕ Support on Ko-fi

Every contribution — large or small — directly funds bug fixes, new features, and long-term maintenance. Thank you. ❤️

📬 Feedback & Issues

Found a bug or have a feature request?
👉 Open an issue on GitHub