Pricing

Pay per usage

JSON Validator — Format, Validate & Fix JSON Data [Free]

Validate, format, and fix JSON data in bulk. Paste raw JSON or upload files — get clean, formatted output with error highlighting. Perfect for API debugging, data cleaning, and ETL pipelines. No coding required. Export as JSON, CSV, or Excel. Custom pipeline: $100 pilot, spinov001@gmail.com

Pricing

Pay per usage

Rating

0.0

(0)

Developer

Alex

Actor stats

Bookmarked

Total users

Monthly active users

2 days ago

Last modified

JSON Validator & Formatter — Validate, Format & Analyze

Validate, pretty-print, and analyze any JSON data in seconds. Paste raw JSON strings or provide API endpoint URLs — get formatted output, minified version, detailed error messages with exact positions, and structural statistics (depth, key count, type breakdown).

Features

Validation — Checks if JSON is valid and returns detailed error messages with exact position and context
Pretty-Print & Minify — Outputs both formatted (configurable indent) and minified versions
Structural Statistics — Counts objects, arrays, strings, numbers, booleans, nulls, total keys, and max nesting depth
Size Analysis — Reports original, formatted, and minified byte sizes with compression ratio
URL Fetching — Validates JSON directly from API endpoints and URLs
Error Locator — Pinpoints the exact character position of syntax errors with surrounding context

Output Example

{
  "source": "input",
  "isValid": true,
  "formatted": "{\n  \"name\": \"John\",\n  \"age\": 30\n}",
  "minified": "{\"name\":\"John\",\"age\":30}",
  "stats": {
    "objects": 1,
    "arrays": 0,
    "strings": 1,
    "numbers": 1,
    "totalKeys": 2,
    "maxDepth": 1,
    "originalSize": 27,
    "formattedSize": 38,
    "minifiedSize": 24,
    "compressionRatio": 0.632
  },
  "scrapedAt": "2026-03-18T12:00:00.000Z"
}

Use Cases

API debugging — Validate and format JSON responses from any endpoint
Data quality checks — Analyze structure and size of JSON datasets before processing
CI/CD pipelines — Automated JSON validation for config files and API contracts
Learning & documentation — Pretty-print JSON for tutorials and technical docs

Input Parameters

Parameter	Type	Required	Default	Description
`jsonStrings`	array	No	`[]`	Raw JSON strings to validate and format
`urls`	array	No	`[]`	URLs returning JSON to validate (e.g., API endpoints)
`indent`	integer	No	`2`	Number of spaces for indentation (1-8)

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