Free Online XML Compress

This page provides six browser-based XML utilities accessible from the left sidebar. Every tool runs entirely in your browser. No data is uploaded, no account is required, and nothing is stored. Select a tool, paste your XML code or upload an .xml file, and the output appears immediately. All tools support drag-and-drop file upload for quick processing.

XML Compress

Compresses XML with four configurable options: remove comments, remove whitespace, remove empty nodes, and self-close empty tags. Shows a real-time statistics bar with compression ratio gauge.

XML Beautify

Reverses compression by expanding compressed XML back into clean, indented code. Each element gets its own line with proper 2-space indentation reflecting nesting depth.

XML Validate

Checks XML well-formedness for unclosed tags, mismatched elements, and unescaped characters. Reports each issue with severity level and line number.

XML to JSON

Converts XML data into structured JSON. Attributes become @attributes objects, repeated elements form arrays, and text content is preserved accurately.

XML Escape

Converts the five predefined XML special characters to their entity equivalents for safe embedding in XML documents.

XML Unescape

Converts XML entities back to their original characters. Supports named entities, decimal numeric entities, and hexadecimal entities.

Online XML Compress with Configurable Options

Most XML compression tools apply a fixed set of transformations with no way to control what changes. The free XML compress tool on this page gives you four independent options that you can toggle individually. Remove Comments strips all XML comment nodes. Remove Whitespace eliminates whitespace between tags and trims lines. Remove Empty Nodes deletes elements that contain no text or child elements. Self-Close Empty Tags converts empty element pairs like <item></item> into self-closing <item/> tags. Toggle any combination and the output updates instantly.

How the XML Compress Tool Works

The compressor processes your XML in four sequential passes based on which options are enabled. First, comment removal scans for all XML comment boundaries and strips them. Second, whitespace removal replaces all whitespace between closing and opening tag brackets with nothing and trims each line. Third, empty node removal iteratively deletes elements that have no content until none remain. Fourth, self-closing tag conversion finds empty element pairs and shortens them. Each pass operates independently so you can fine-tune exactly which optimizations apply to your XML.

Real-Time Compression Statistics with Visual Gauge

The statistics bar below the options panel shows a live summary as you type or upload a file. It displays the original file size, the compressed file size, the number of bytes saved, and the percentage reduction. A visual compression ratio gauge shows how much of the original size remains. It also shows line count changes, the number of comments removed, and the number of empty nodes removed. This gives you immediate, quantified feedback on exactly how much overhead was in your original XML.

XML File Upload and Drag-and-Drop

You can load XML data by clicking the Upload XML button in the toolbar or by dragging and dropping a file directly onto the editor. Supported file types include .xml, .xsl, .xslt, .svg, and .xhtml. The file content loads into the input editor and compression starts automatically based on your selected options. There is no file size limit enforced by the tool since all processing happens locally.

Free XML Beautify and Validator

The XML Beautify tool takes compressed, single-line XML and expands it back into a readable, properly indented format. Each element gets its own line and nesting depth is shown through consistent 2-space indentation. This pairs naturally with the compressor: compress XML for production, then beautify it when you need to read, debug, or edit the code. The XML Validate tool checks your code for well-formedness issues. It reports errors like unclosed tags and mismatched elements, warnings like unescaped ampersands, and provides line numbers for each issue found.

Converting XML to JSON

The XML to JSON converter uses the browser's built-in DOMParser to parse your XML and then walks the document tree to build a clean JSON representation. Element attributes are stored in an @attributes object within each element. When the same element name appears multiple times under a parent, those elements are automatically grouped into a JSON array. Text-only elements are simplified to string values. The output is formatted with 2-space indentation for readability and can be copied or downloaded as a .json file.

XML Escape and Unescape

The XML Escape tool converts the five predefined XML special characters to their entity equivalents: ampersand, less-than, greater-than, double quote, and single quote. This is essential when embedding user-supplied text inside XML elements or attributes. The XML Unescape tool reverses this process, converting entities back to their original characters. It supports named entities, decimal numeric entities, and hexadecimal entities.

Privacy and Browser-Only Processing

Because all processing happens locally in your browser, your XML data never leaves your device. This makes these tools safe to use with production configuration files, proprietary data feeds, and XML that contains sensitive information. No data is transmitted to any server, no cookies are set, and no account or signup is required.

Related Online XML and Data Tools

If you work with XML compression and data transformation regularly, these other free tools on the site complement this page:

Code Formatter -- format HTML, CSS, JSON, XML, and JavaScript in one tool
JSON Formatter -- format, minify, validate, and transform JSON data
JSON Beautifier -- beautify and indent JSON with syntax highlighting
JSON Compress -- compress JSON by removing whitespace and formatting
HTML Minify -- minify, expand, validate, and transform HTML code
HTML Beautifier -- beautify, minify, validate, and transform HTML code
CSV to JSON -- convert CSV data to JSON format
Base64 Decoder -- decode Base64 encoded strings back to plain text