AST Parser & TS Generator5 min readUpdated on
JSON Formatter, Validator & TypeScript Interface Generator Guide
Format JSON with precision, detect syntax errors with line/column accuracy, auto-generate TypeScript interfaces, and convert to YAML.
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WEBioDD Engineering Team•100% In-Browser & Zero-Trust
Key Takeaways
- JSON parsers use Abstract Syntax Tree (AST) engines to detect syntax errors with exact line and column offsets.
- TypeScript interface generation reverse-engineers JSON structure into statically-typed contracts.
- Minified JSON reduces network payload size by ~30% by removing whitespace.
- YAML conversion provides human-readable configuration file alternatives.
100% In-Browser & Local Execution
Format & Validate JSON
Beautify, minify, repair malformed JSON, and export TypeScript interfaces instantly.
- Syntax error line/col pinpointing
- Auto-generate TS interfaces
- YAML converter
- Minify & beautify (2/4 spaces, tabs)
01.JSON Syntax Validation & AST Error Detection
JSON (JavaScript Object Notation) is a strict data interchange format. Parsers build Abstract Syntax Trees (AST) and report exact line/column positions for errors like trailing commas, unquoted keys, or mismatched brackets.
typescriptNative JSON.parse() error detection
// JSON Validation with Error Reporting
function validateJSON(input: string): { valid: boolean; error?: string } {
try {
JSON.parse(input);
return { valid: true };
} catch (e: any) {
return { valid: false, error: e.message };
}
}02.Automatic TypeScript Interface Generation
TypeScript interfaces provide compile-time type safety. Our tool reverse-engineers JSON objects and arrays, inferring types (string, number, boolean, nested objects) and generating interface definitions.
03.YAML Conversion for Configuration Files
YAML (YAML Ain't Markup Language) is a human-readable superset of JSON used in Docker Compose, Kubernetes, and CI/CD pipelines. Our tool converts JSON to YAML syntax with proper indentation.
How to Format and Validate JSON
Step-by-step JSON formatting and validation workflow.
1
Paste JSON Data
Copy your JSON from API responses, config files, or code and paste into the input editor.
2
Auto-Format with Beautify
Click Beautify to apply 2-space or 4-space indentation for readability.
3
Inspect Syntax Errors
If invalid, view exact line and column positions of syntax violations.
4
Generate TypeScript Interfaces
Click "Generate TS Interface" to export statically-typed definitions for your codebase.
Frequently Asked Questions
JSON uses brackets and quotes; YAML uses indentation and colons. YAML is more human-readable but less strict.