XML minifier

Removes whitespace between tags for valid XML.

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Overview

Minifying XML means removing all unnecessary whitespace between tags — line breaks, indentation, extra spaces — while keeping the document semantically identical. Unlike CSS and JavaScript, where minification is nearly mandatory in production, XML minification has more specific use cases: transmission over bandwidth-limited networks, compact storage in databases, embedding in attributes of other formats such as JSON or HTML, and size comparisons to evaluate the difference between verbose XML and its compacted version.

XML is already natively heavier than JSON for representing the same information — a simple integer element can cost 30 bytes in XML versus 8 in JSON. Minification does not fix that structural gap, but it can reduce heavily formatted documents by 20 to 40 percent. In systems where XML is generated by tools that produce well-indented output by default, such as JAXB in Java, the files arrive bloated with whitespace. For storage in Redis or text columns in a database, removing that noise makes a real difference.

An important distinction: significant whitespace inside text elements should be preserved. The text `<title> Hello </title>` with internal spaces is different from `<title>Hello</title>` — minification handles spaces between tags, not inside text content. This tool is conservative on that point: it removes only whitespace between elements, never inside text nodes. For cases where even this is too aggressive, the correct approach is to use the `xml:space='preserve'` attribute in the document.

This tool processes the XML in the browser and produces the compacted version without sending anything to the server. It does not replace a build pipeline with gzip or brotli compression, where the real gain happens — a compressed XML file drops to a fraction of its minified size. For quick use, payload comparison, or preparing XML to embed in another format, it is the most practical option. Paste, click, copy.

Technical deep dive

Common questions summarized

  • What is this tool for?: It runs fully in your browser: useful to validate, format, or convert data in everyday development.
  • Are my inputs sent to a server?: Processing happens locally with JavaScript. We do not store what you paste into the text areas.
  • Can I use this for real production data?: Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.

Sample payload to try

  • See also the larger "Code Snippets" sample; paste this excerpt to try locally: Use — <user id="1"><name>Ada</name></user>

Tool guide

  • What XML is See above.

  • What the minifier does Strips extra whitespace between tags and compacts the document while keeping valid XML.

  • Why use it Compare size, embed XML in attributes, or meet byte limits. Production pipelines may go further.

Code Snippets

Code example
<user id="1"><name>Ada</name></user>

Use

<user id="1"><name>Ada</name></user>

FAQ

What is this tool for?

It runs fully in your browser: useful to validate, format, or convert data in everyday development.

Are my inputs sent to a server?

Processing happens locally with JavaScript. We do not store what you paste into the text areas.

Can I use this for real production data?

Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.