Free tools
XML tools that don't ask for an account
Paste a document, get an answer. Every tool runs server-side on the content you supply, stores nothing, and accepts documents up to 2 MB.
XML validator
Check whether a document is well-formed XML, with the exact line and column of the first error — and optionally validate it against an XSD.
ValidateXSD validator
Validate an XML document against an XSD schema and get every violation with its line — required attributes, datatypes, element order and cardinality.
Validate against schemaSitemap validator
Check a sitemap.xml or sitemap index against the sitemaps.org protocol: URL counts, size limits, lastmod freshness and structure.
Check sitemapRSS & Atom feed validator
Check an RSS 2.0 or Atom 1.0 feed against its specification: required channel and entry elements, date formats, self links and duplicate identifiers.
Check feedXPath explorer
List every element path in a document with its occurrence count, depth and a sample value — plus the attributes declared on each.
Extract pathsXML to JSON converter
Convert an XML document to JSON, keeping attributes rather than discarding them and — by default — keeping every value as a string, not a guessed type.
ConvertXML to CSV converter
Turn XML into CSV — one row per repeating record such as a sitemap URL or feed item, or one row per element path with counts and sample values.
ConvertXML formatter
Indent an XML document, or canonicalise it, using libxml2's own serializer — mixed content, CDATA, comments and prefixes all survive.
FormatXML diff
Compare two XML documents structurally: which paths, attributes and namespaces were added, removed or changed — ignoring reordering and reindentation.
Compare
Nothing you paste is stored
These tools parse in memory and return a result. No document, no fragment, and no filename is written to a database or a log — only a count of how many bytes were processed, so we can keep the tools up. They also fetch nothing: they read only what you supply, which is why there is no URL field.
Where to go from here
Read the format reference for the constraints each document type imposes, look up an XML error you hit, or check a namespace URI.
Get started
Need to keep what you checked?
A free workspace stores every version of a document, makes its structure searchable, diffs versions against each other, and re-checks monitored URLs on a schedule.