What does Data Format Analyzer do?

Paste JSON to validate syntax, structure, size, and content. Get a validation score and fix recommendations. Free on ValidateThis in your browser—line-aware feedback, related validators, programmatic error guides, and optional API access for teams. Use the form above, then see “How to use” and “What this check helps you catch” for behavior detail.

Is this a substitute for server-side validation?

No. Use it for manual checks and triage; production systems should still validate and authorize on the server.

Where does processing happen?

Most validators here run in your browser. If a tool calls an API, that is stated on the page. See the site privacy policy for data handling.

Data Format Analyzer

Validators and utilities that complement Data Format Analyzer — same session, no sign-up.

Paste your data (JSON, XML, YAML)

See example

Paste valid JSON like { "name": "test" } and click Analyze. Try: {}, { "items": [] }, or the default sample above.

Popular formats to check

Quick links to format-specific validators:

JSON Validator XML Validator YAML Validator CSV Validator All tools →

What this tool checks

JSON syntax validity
Structure (root object/array, nesting)
Content size and format
Common issues (trailing commas, unquoted keys)

How the Data Format Analyzer works

Step 1: Paste your JSON, XML, or YAML data
Step 2: Click Analyze — we validate syntax, structure, and size
Step 3: Get a validation score (0–100) and links to fix tools for each issue

FAQ

What formats are supported?: Currently JSON. XML and YAML support are planned. Use the format-specific validators for full validation.
What is the validation score based on?: Syntax correctness, valid structure (object/array), content size, and common best practices.
How do I fix validation errors?: Each check includes a Fix link to the right validator (JSON, XML, YAML, API Response) for detailed repair.

Fix guides

Invalid JSON Invalid XML Invalid YAML API Response Checker

Partner analyzers

Same two cross-network links as elsewhere: technical SEO and API response checks.

SEO Infrastructure API Response

Internal links

All tools Data Quality Analyzer Log File Analyzer JSON Validator

Paste JSON to validate syntax, structure, size, and content. Get a validation score and fix recommendations.

About this tool

Paste JSON (or paste XML/YAML in future) to get a validation score, syntax check, structure analysis, and links to fix tools.

How to use this tool

Paste your sample in the input (or fetch from URL if this tool supports it).
Run the main action on the page to execute Data Format Analyzer.
Read the result, fix the source data or config, and re-run if needed.

What this check helps you catch

Paste JSON to validate syntax, structure, size, and content. Get a validation score and fix recommendations.
Limits called out in the description (what this tool does not verify — e.g. live network reachability, issuer databases, or strict schema contracts unless stated).
Structural or syntax mistakes that would break parsers, serializers, or the next step in your workflow.

FAQ

What does Data Format Analyzer do?: Paste JSON to validate syntax, structure, size, and content. Get a validation score and fix recommendations. Use the form above, then see “How to use” and “What this check helps you catch” for behavior detail.
Is this a substitute for server-side validation?: No. Use it for manual checks and triage; production systems should still validate and authorize on the server.
Where does processing happen?: Most validators here run in your browser. If a tool calls an API, that is stated on the page. See the site privacy policy for data handling.