XML Editor
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XML is unforgiving about structure — one unclosed tag or mismatched name and the whole document stops being well-formed, often with an error message that points somewhere unhelpful. This XML editor gives you the tooling to avoid that: syntax highlighting so elements and attributes are distinguishable, code folding so you can collapse the sections you are not working on, and well-formedness checking that tells you where the document actually breaks. Paste a configuration file, a SOAP envelope, an RSS feed, or a data export, make your edits, and copy the result out. It is equally useful for authoring a small file by hand and for repairing a large one that some other system produced badly. Because it is entirely client-side, the document never leaves your browser, so editing files containing internal endpoints or customer data is safe.
Features
- Full code editor with XML syntax highlighting
- Code folding to collapse elements and large sections
- Well-formedness checking with error positions
- One-click reformat with consistent indentation
- Handles attributes, namespaces, CDATA, and comments
- Copy the edited document to your clipboard
- Stays responsive on large files
- Fully client-side — nothing is uploaded
Why use this xml editor?
- Catches unclosed and mismatched tags as you work
- Keeps internal configuration files private
- Makes long documents manageable through folding
- No install, no account, no file size cap
- Free with unlimited edits
Frequently asked questions
Is my XML uploaded to a server?
No. The editor runs entirely in your browser. Your document is never transmitted, stored, or logged, so editing files with internal or personal data is safe.
What makes an XML document well-formed?
Every element must be closed, tags must nest correctly, attribute values must be quoted, and there must be exactly one root element. The editor reports the first place these rules are broken.
Does this validate against a schema (XSD or DTD)?
It checks well-formedness, which is the syntax layer. Validating against an XSD or DTD is a separate step that requires the schema itself.
Can I edit XML with namespaces?
Yes. Prefixed elements and attributes such as soap:Envelope are handled normally, and namespace declarations are preserved as written.
Why does my file show an error at the very first line?
Usually a stray character or byte-order mark before the XML declaration. The declaration must be the first thing in the document with nothing preceding it.
Can I convert the edited XML afterwards?
Yes. Use XML to JSON, XML to CSV, or XML to YAML to export it once the document is well-formed.