Calculator
What the XML Validator does
XML Validator: checks Check and Formatted XML from XML Input.
The XML Validator takes XML Input and returns Check and Formatted XML. The result recalculates on every keystroke without a button press or a page reload.
It is mostly used by people inspecting an API response. Most of these tasks are one-liners in a terminal, but not when you are away from one.
The page holds your values in memory and forgets them the moment you close it.
Further down the page: what each field expects, how the result is derived, and one example worked from the defaults.
What do the XML Validator fields mean?
The XML Validator uses 1 input. The form opens pre-filled, so the fastest way in is usually to overwrite the one field you actually care about.
| Field | What to enter | Default |
|---|---|---|
| XML Input | paste or type any amount of text | <?xml version="1.0"?> <root> <name>YoursTools</name> <tools>801</tools> </root> |
How does the XML Validator work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same check.
Values are checked first: an out-of-range or non-numeric entry names the offending field instead of returning nonsense.
Worked example
These are the values the XML Validator loads by default, and the result it produces from them. These are the tool’s own default values and the result they produce, not an invented illustration.
| XML Input | <?xml version="1.0"?> <root> <name>YoursTools</name> … |
|---|
| Check | Looks like XML: open≈3, close≈3, self-closing≈0 |
|---|---|
| Formatted XML | <?xml version="1.0"?> <root> <name>YoursTools</name> <tools>801</tools> </root> |
How to use it
- Paste your content into XML Input.
- You will see the result move while you are still editing: that is expected.
- The results panel then shows Check and Formatted XML.
- Both Copy Link and Print capture the current state, so pick whichever suits how you file things.
What this tool does not do
- Output follows the common convention for this format; a specific toolchain may have its own house style.
- Processing happens in your browser, so extremely large inputs are bounded by available memory.
- It assumes the values you give are already consistent with each other.
Frequently asked questions
You need XML Input. A starting value is in place for each, which means a single edit is enough to get a meaningful answer.
With the values loaded when the page opens, check comes out as Looks like XML: open≈3, close≈3, self-closing≈0. It recalculates the moment an input changes, which makes comparing scenarios quick.
It never leaves the tab. The page does the work itself rather than asking a server to.
It costs nothing, and there is no limit on repeat use.
The check is exact for the method described above. Where a value is rounded for display, the underlying figure keeps full precision.