XML Formatter
Format and indent XML into clean, readable structure
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Have you ever opened an XML file and found the whole document on line one? Can you tell which closing tag belongs to which element when nothing is indented? XML Formatter on EizTools takes flat markup and indents it properly, so the tree structure of the document becomes visible again.
Short answer: XML Formatter on EizTools is free, and it formats and indents XML into a clean, readable structure. Paste your flattened markup and the nesting, the attributes and every element come back laid out clearly.
What is XML Formatter?
XML Formatter is a layout tool for markup. It indents each level of nesting, puts elements on their own lines, and spaces attributes consistently so a long tag stops being a wall of text.
The content does not change. Same elements, same attributes, same values, arranged so the hierarchy is something you can see rather than something you have to reconstruct by counting angle brackets.
How Does XML Formatter Work?
Paste the XML into the prompt box, choose a model, set the strictness, then press Generate. The formatted markup appears in the output card inside a code block, with a language bar and a copy button on it.
Set Operation Focus to Format so the run stays a layout job. Strictness then decides how rigidly the indentation rules are applied, from Light through Standard to Strict. Keep Formatting is a toggle worth understanding here: it preserves deliberate whitespace inside elements, which matters when a value contains formatted text you do not want collapsed.
| Control | What it does to your markup | Suggested |
|---|---|---|
| Operation Focus | The type of work applied, Format being layout only | Format |
| Strictness | How rigidly indentation and spacing rules are applied | Standard for most documents |
| Keep Formatting | Preserves intentional whitespace inside element values | On when values contain formatted text |
| Reading Level | Affects any explanation added alongside the markup | Professional, or leave on None |
Note Whitespace can be significant in XML. Where an element's value must keep its exact spacing, turn Keep Formatting on so indentation is added around the structure and not inside the content.
Key Features
Visible nesting
Each level indented, so you can see at a glance which elements sit inside which.
Tidy attributes
Long tags with many attributes get spaced consistently instead of running off the screen.
Faults become obvious
A mismatched tag that hid in one long line stands out immediately once indented.
Common Mistakes
- Formatting a document with real credentials in it. Replace tokens with placeholders first.
- Assuming formatting fixes validity. A well laid out document can still be invalid against its schema.
- Collapsing whitespace inside elements where the spacing was meaningful.
- Reformatting a file under version control without telling anyone, which turns one real change into hundreds of noisy ones nobody can review.
EizTools runs a growing library of specialised tools, free to use and needing no account, each with settings tuned to its own work rather than a shared panel. You choose the AI model on the page for each run. When formatting reveals that the document is genuinely broken rather than merely ugly, the Error Fixer takes it from there.
Frequently Asked Questions
Does XML Formatter validate my document?
Formatting and validation are different jobs. It will often make a mismatched tag obvious while laying the document out, but checking against a schema needs a proper validator in your own toolchain.
Will it change my element values?
It should not. Formatting adds indentation around the structure. Turn Keep Formatting on when values contain deliberate spacing, so nothing inside an element gets collapsed during the layout pass.
Can it handle namespaces and prefixes?
Yes. Prefixed element names and namespace declarations are laid out like any other markup, and the declarations stay attached to the elements that carry them in your original document.
How large a document can I format?
Moderate files work well. Very large documents are better handled in sections, or with a formatter built into your editor, which will handle megabytes without needing to read the result.
Markup that cannot be read does not get maintained; it gets replaced by someone who guessed what it was for. Indentation is a small thing that decides whether a document stays understandable a year from now. Paste your flattened file into XML Formatter above and look at the tree.
Sabir Bepari
Founder of EizTools and a passionate AI enthusiast dedicated to building practical, user-friendly AI tools that simplify everyday tasks.
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