ToolzyLab
Beautify and indent XML or HTML strings instantly. Clean messy markup, validate structure, search through formatted output, minify when needed, and export polished code directly in your browser.
Paste raw XML or HTML, upload a file, beautify large markup blocks, validate structure, normalize indentation, minify for compact output, and download clean code in a polished ToolzyLab layout.
Paste markup, upload an .xml or .html file, or drag and drop code here to format instantly.
📄 .xml / .html / .svg · ⚡ beautify · ✅ validate · 📉 minify · 🔒 no uploadWrite or paste raw markup on the left, then inspect the beautified result on the right.
1
1
See structure status, parser notes, and line-specific issues after validation or formatting.
Use XML mode for strict documents like feeds, SVG, SOAP, sitemap, and config files. Use HTML mode for webpage markup, email templates, or fragments. This tool runs fully in your browser and never uploads your code.
Quick stats for the current output so you can scan size, tags, attributes, comments, and structure fast.
It auto-detects XML or HTML, validates markup, pretty-prints nested nodes, formats text and comments more cleanly, highlights output, counts useful markup stats, supports file upload, and lets you copy or download the result in one polished screen.
XML is case-sensitive and requires one properly nested document element. Choose XML or HTML mode, indentation, attribute layout, empty-tag style, text-node handling, and search, then validate names, namespaces, declarations, encoding, entities, CDATA, and mixed content before replacing a machine-consumed document.
XML does not apply HTML's forgiving repair rules. Start and end tag names must match exactly, elements must nest properly, and attributes cannot repeat on one element. A well-formed document is not necessarily valid against a DTD, XSD, or application schema.
Indenting element-only data is usually safe, but adding or removing whitespace inside mixed content can change the text presented to an application. Namespace prefixes can vary while namespace URIs carry identity; do not rename or remove declarations casually. Preserve xml:space instructions and processing expectations.
DOCTYPE declarations and external entities can create file disclosure or network-request risks in vulnerable server parsers. This tool's formatting result does not make untrusted XML safe. Disable external entity resolution and DTD processing where possible, apply resource limits, and validate against an allow-listed schema in the consuming application.
Validate the output with the same secure parser and schema used by the destination.
Technical references: W3C XML 1.0 specification W3C XML Namespaces specification
It follows XML syntax rules such as one root element, matching case-sensitive tags, proper nesting, quoted attributes, and legal character use.
Not necessarily. Validity adds constraints from a DTD, XSD, or other schema. A formatter can check syntax without knowing the application's required structure.
It can in mixed content or when an application preserves whitespace. Review text nodes and xml:space before inserting or removing formatting.
They associate qualified names with namespace URIs to avoid collisions. Prefix spelling can change, but the URI and scope determine identity.
CDATA is a source representation for text containing markup characters. Converting it to escaped text can preserve value, but source-sensitive systems or human workflows may expect the section.
Unsafe parsers can resolve entities to local files or network resources. Disable external entity processing and apply secure parser settings for untrusted XML.