Static + Browser-Only

XML Regex Tester and Validator Online

Test regex rules against XML online. Put regex rules JSON on the left, validate an XML payload on the right, and highlight invalid or missing node values directly in the browser.

This is useful for XML export review, SOAP payload validation, feed checks, and regex-based markup validation without uploading data.

Rules

Regex rules JSON

Paste regex rules JSON on the left and an XML payload on the right.

Payload

Payload XML

Validated payload with field-level regex highlights will appear here

What Is It

What is an XML regex tester and validator?

This page validates XML against a rules JSON object where each field contains a regex pattern. It helps teams test whether XML nodes match expected formats before sharing, debugging, or using that markup elsewhere.

Use Cases

When should you validate XML with regex rules?

Check API fixtures before QA or release review
Validate form payload patterns like email, phone, and member IDs
Review XML exports, SOAP fragments, and feed values against internal standards
Highlight XML tags or node values that break expected regex rules

Features

What this XML regex validation tool can do

Use a JSON object of regex rules as the source of truth
Validate nested XML paths such as account.memberId and account.email
Highlight invalid and missing values in XML payloads
Run locally in the browser with no upload

FAQ

Common questions

How do I test a payload against regex rules?

Paste your regex rules JSON on the left, paste the matching payload format on the right, and run validation. Invalid or missing fields are highlighted in red inside the payload viewer.

Can I validate nested XML fields?

Yes. Nested XML structures are supported, so rules like account.memberId and account.email work when the XML structure matches.

Does this work only for XML?

Yes. This page is focused on XML validation. Other regex pages are available for JSON, HTML, CSV / TSV, SQL, logs, plain text, and HTTP payloads.

Does this upload the rules or payload?

No. Validation runs locally in the browser and no rules JSON or payload content is uploaded during the workflow.

Why XML regex validation matters before sharing or testing payloads

Teams often assume sample payloads are valid until a downstream system rejects them. An XML regex validator makes those formatting problems visible before markup reaches QA, support, docs, vendors, or AI workflows.

This is useful for XML nodes such as emails, phone numbers, member IDs, order IDs, and status tags where format errors are easy to miss.

Teams often search for a free regex tester online when they need to validate field formats, check sample payloads, enforce naming rules, or catch invalid values before QA, release review, or external sharing. A browser-only regex validator is especially useful when payloads, logs, or request examples should stay local and should not be uploaded to a remote validator.

Examples

Example XML rules and payload

The rules JSON defines regex patterns, and the payload is an XML document with invalid node values highlighted.

Regex rules JSONValidation rules

{
  "email": "^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,}$",
  "phone": "^\\d{3}-\\d{3}-\\d{4}$",
  "status": "^(active|pending|paused)$",
  "customer": {
    "memberId": "^mem_\\d{3,}$"
  }
}

Payload XMLInvalid fields highlighted

{
  "email": "john@example.com",
  "phone": "2045550199",
  "status": "trial",
  "customer": {
    "memberId": "204"
  }
}