Add Errors to XML

Add subtle errors to an XML document — broken tags, swapped quotes, truncated values — great for testing validators and parsers.

Input

Live

Output

About Add Errors to XML

Add Errors to XML mutates a document with realistic mistakes — dropped closing tags, swapped quotes, truncated text, duplicated attributes and unescaped characters — ideal for stress-testing XML validators and parsers.

Features

Seven configurable error types

Random selection with a fixed seed

Control how many errors to inject

Report of applied mutations

Great for parser test suites

How to Use

Paste valid XML.

Pick the error types to inject.

Set the number of errors.

Copy the mutated document.

Examples

With two errors enabled, the sample might lose a closing tag and swap an attribute quote.

Benefits

Stress-test validators and parsers

Teach what malformed XML looks like

Deterministic with a fixed count

Frequently Asked Questions

Is my XML sent to a server?

No. Everything runs locally in your browser. Your data is never uploaded, stored or logged.

Can I download the result?

Yes — use the Download button below the output area, or Print / Save PDF for a printable copy.

More XML Tools

View All

Extract Plain Text from XML

Free tool to extract plain text from XML: strip tags, attributes, comm...

Use Double Quotes Everywhere

Normalize every XML attribute to double quotes. Single-quoted attribut...

Convert IXML to XML

Parse invisible-XML (IXML) style notation and rebuild a valid, pretty-...

Convert XML to Properties

Flatten an XML file into a Java .properties file — nested elements bec...

Convert TSV to XML

Free TSV to XML converter that builds valid XML from tab-separated row...