Free Tool

JSON Formatter

Pretty-print and validate JSON.

Input JSON

IndentSort Keys A To Z

Formatted Output

{
  "campaign": "black-friday-2026",
  "channel": "google-ads",
  "budget_inr": 480000,
  "audience": {
    "geo": "IN",
    "age": [
      24,
      44
    ],
    "intent": "high"
  },
  "creatives": [
    {
      "id": "cr_01",
      "format": "video",
      "hook": "9 seconds to conversion"
    },
    {
      "id": "cr_02",
      "format": "static",
      "hook": "One promise, one CTA"
    }
  ],
  "utm": {
    "source": "google",
    "medium": "cpc",
    "campaign": "bfcm26"
  }
}

Keys

Depth

Input

399 B

Minified

332 B (-17%)

The Discipline

Clean JSON Is A Trust Signal.

Every server side conversion, every CAPI event, every GTM data layer push travels as JSON. A single stray comma silently drops the payload and Meta or Google returns a 200 that looks fine on the surface. The scale team then optimises against a dashboard that is missing 8 to 20 percent of events.

This formatter parses your JSON strictly, points at the exact line and column that broke, and minifies the clean version for production. Paste, validate, ship.

Rules Of Clean JSON

Double Quotes Only. Keys And String Values Both Need Double Quotes. Single Quotes Are Not JSON.
No Trailing Commas. Legal In JavaScript, Fatal In JSON. Strip Them Before Sending.
No Comments. JSON Has No Comment Syntax. Remove Every // And Every Block.
Escape Special Characters. Backslashes, Quotes, And Newlines Inside Strings Must Be Escaped.

Nine of ten server side tracking bugs we audit are malformed payloads, not missing endpoints.

GTM Data Layer

Validate Every Push

Paste the object you plan to push in window.dataLayer. If it fails here, GTM triggers will silently miss it in production.

Meta CAPI

Server Event Payloads

Meta returns 200 even when required user_data hashes are malformed. Format and inspect the body before you hit the endpoint.

Webhooks

Zapier And Make

Automation platforms fail loudly on invalid JSON. Minify the clean version and paste it into the raw body field.

Common Mistakes

Payloads That Silently Drop.

Copying From JavaScript. Object Literals Use Unquoted Keys. JSON Does Not.
Copying From Excel Or Google Sheets. Smart Quotes Break Parsing. Retype Or Use A Plain Editor.
Undefined Values. JSON Only Knows Null. Undefined Is A JavaScript Concept.
Numbers As Strings. value 1200 And value "1200" Behave Differently In Ads Reporting.
Nested Escaping. Stringifying A String That Is Already A String Doubles The Backslashes.

Where To Use The Output

GTM Custom HTML. Paste The Minified Version Inside JSON.parse Or Directly In dataLayer.push.
Meta Events Manager. Paste The Pretty Version In The Test Events Tab To Debug.
Google Ads OCT. Offline Conversion Uploads Accept Minified JSON Rows.
Postman Or Insomnia. Paste The Pretty Version, Then Switch To Raw For Send.
CRM Webhooks. Minify To Keep Payloads Under Provider Limits.