Online JSON Formatter, Validator & Auto-Repair - 100% Private
Beautify, compact, validate syntax errors with line/column pinpointing, auto-repair malformed JSON, and generate TypeScript interfaces locally in your browser.
100% Private Sandbox: Your JSON data is parsed in memory and never logged, cached, or transmitted to any server.
All file encoding, rendering, and transformations run inside local browser memory.
Key Features & Performance Capabilities
Intelligent Auto-Repair
Fix common JSON mistakes automatically: unquoted keys, trailing commas, single quotes, and missing brackets.
Precise Syntax Error Locator
Identifies syntax errors with pinpoint line and column numbers and actionable error diagnostics.
Interactive Tree View & Path Navigation
Explore deeply nested objects and arrays with collapsible nodes and one-click JSON path copying.
TypeScript & CSV Exporter
Instantly generate strongly-typed TypeScript interfaces or export tabular arrays of objects to CSV format.
How to Use JSON Formatter, Minifier & Validator
Paste or Load JSON
Paste your raw JSON into the editor, click 'Sample' to load dummy data, or type directly into the workspace.
Format, Minify, or Auto-Repair
Click 'Beautify' to indent (2 spaces, 4 spaces, or tabs), 'Minify' to remove all whitespace, or 'Auto Repair' to fix invalid syntax.
Switch Views
Toggle between Code Editor, Interactive Tree View, TypeScript Type Definitions, and CSV export tabs.
Copy or Download
Copy formatted results to your clipboard with one click, or download the output as a .json or .d.ts file.
Optimizing Developer Productivity with Browser-Native JSON Tooling
The Importance of Valid JSON Structure
JavaScript Object Notation (JSON) is the universal data interchange format for modern APIs, configurations, and microservices. Strict adherence to RFC 8259 is mandatory: strings must use double quotes, trailing commas are disallowed, and keys must be properly quoted. Our validator and auto-repair engines enforce specification compliance automatically.
Total Confidentiality for Proprietary Data
Developers routinely inspect JSON payloads containing internal API keys, customer database records, and environment configurations. Sending this data to third-party web tools poses severe data leak risks. VicanTools ensures your data never leaves your local browser sandbox.
Frequently Asked Questions (FAQ)
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