ToolBox

DEVELOPER TOOL

XML Formatter & Validator

Format, validate, and minify XML with clear error messages.

About this tool

Paste any XML to check whether it's well-formed and see it reformatted with clean, readable indentation. If something's wrong, the error message tells you roughly where the problem is. Minify strips all unnecessary whitespace for the smallest possible output.

Parsing uses your browser's built-in XML parser, so nothing is uploaded — everything happens locally.

Frequently asked questions

What counts as invalid XML?
Common issues include unclosed tags, mismatched opening/closing tags, multiple root elements, and unescaped special characters like a bare & or < inside text content.
Does this validate against a schema (XSD/DTD)?
No — it only checks that the XML is well-formed (valid syntax), not that it conforms to a particular schema or set of allowed elements.
Are comments and CDATA sections preserved?
Yes — comments and CDATA sections are kept in both the formatted and minified output.
JSON Formatter & Validator

Format, validate, and minify JSON with clear error messages.

 YAML ↔ JSON Converter

Convert between YAML and JSON instantly, in either direction.

 HTML Formatter & Minifier

Beautify HTML with clean indentation, or minify it to a single line.

 CSV ↔ JSON Converter

Convert between CSV and JSON, with correct handling of quoted fields.

 SQL Formatter

Format and beautify SQL queries with consistent keywords and indentation.

 Regex Tester

Test a regular expression against text and see every match highlighted.

 Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to plain text.

 URL Encoder / Decoder

Percent-encode or decode text and URLs safely.

 HTML Entity Encoder / Decoder

Escape text to safe HTML entities, or decode entities back to text.

 robots.txt / sitemap.xml Generator

Generate a robots.txt crawler policy or a sitemap.xml from a list of URLs.

 UUID Generator

Generate random version 4 UUIDs, one or many at a time.