XML Validator
Check XML for errors and see exactly where the problem is.
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Free online XML Validator
Check XML for errors and see exactly where the problem is. The Tools4U XML Validator is part of our Data & File Tools collection of XML utilities. It works online in any modern browser — no download, no sign-up and no file upload, so your data never leaves your device.
How to use
Using XML Validator in three steps
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1
Add your input
Paste text, drop a file, or type directly into the workspace.
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2
Run the tool
Choose the options you need and press the action button.
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3
Copy or download
Take the result with one click — nothing is stored anywhere.
Features
Why people use this tool
Instant results
Everything runs locally, so results appear as you type.
Privacy-first
Your input never leaves the browser. No uploads, no logs.
Handles big inputs
Comfortable with large files and long documents.
Always free
No account, no limits, no watermark on results.
FAQ
Frequently asked questions
Is XML Validator free to use?
Is my data uploaded to a server when I use XML Validator?
Can I use XML Validator on mobile?
Do I need to install any software to use XML Validator?
Keep going
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People using XML Validator often open these next.
XML Formatter
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XML Viewer
Open and explore XML in a readable, collapsible view.
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CSV Viewer
Open and explore CSV in a readable, collapsible view.
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