Notepad++ cannot convert XML to JSON natively — the editor opens XML files as plain text — but pairing it with the browser-based XML to JSON Converter produces predictable JSON locally with attributes, text, and repeated elements preserved. The trade-off is that Notepad++ has no built-in parser that turns your XML into a JSON tree, so most workflows copy the document into a dedicated converter. The browser-based XML to JSON Converter is designed for this exact handoff: you paste one well-formed XML document from Notepad++, pick an indentation style, and get a deterministic JSON representation that preserves attributes, namespaces, and repeated sibling elements. Parsing happens entirely in your browser using the native DOMParser described by the MDN DOMParser documentation, so the source XML never leaves your machine. Because XML and JSON do not share a universal one-to-one mapping, the tool uses an explicit convention with @attributes for attributes and #text for direct character data, and you should compare that contract against what your receiving system actually expects.
Why Notepad++ Alone Won't Convert XML to JSON Reliably
Notepad++ has no awareness of your document's structure when you ask it to transform content — find-and-replace operates on character patterns, not on the XML tree, and that gap is why a separate converter is usually needed. The editor treats every buffer as text, which keeps editing fast but removes any opportunity for an automatic XML-to-JSON transformation inside the same session.
The most common workaround inside Notepad++ is the XML Tools plugin, which adds commands like Pretty print, Linearize, and XPath queries through the Plugins menu. It also exposes a JSON View option, but that view simply reformats the active file when the content is already JSON; it does not produce JSON from an XML buffer. Real XML-to-JSON transformation inside that plugin is limited, so most users end up copying the document into a separate converter anyway.
Manual find-and-replace rules are even more brittle. Patterns that look correct on one file will silently misbehave on another: attributes without quotes, duplicate root elements, unclosed CDATA sections, namespace prefixes, and mixed-content elements all break naive regex replacements. A structured converter that walks the document tree eliminates those silent failures and gives you a reproducible mapping you can compare against the JSON contract your downstream service expects.
Convert XML to JSON in Notepad++ Using a Browser Workflow
- Open your XML file in Notepad++ and review it for a well-formed root element, balanced tags, and no DOCTYPE declaration at the top. If a <!DOCTYPE ...> line exists, delete it before continuing — the converter deliberately rejects DOCTYPE to avoid external entity expansion.
- Select the entire document (Ctrl + A on Windows, Cmd + A on macOS) and copy it to the clipboard.
- Open the XML to JSON Converter in the same browser session and paste the document into the input area.
- Choose the JSON indentation style that matches your downstream use: compact for transport, two-space for typical API samples, or four-space for readable review.
- Click Convert to JSON. The browser parses the XML with DOMParser; if a parser error appears, the tool rejects the document instead of returning partial output.
- Review the resulting JSON, paying attention to the @attributes objects, the #text keys where text coexists with children, and the JSON arrays that replace repeated sibling elements.
- Copy the JSON output and paste it back into a new Notepad++ tab for further editing, validation, or comparison with a previous version using the Notepad++ JSON formatting guide.
How the Conversion Convention Maps XML to JSON
XML and JSON have no universal one-to-one mapping, so this converter publishes an explicit contract rather than claiming a standard. Knowing the rules in advance lets you predict the output and spot mismatches before they reach production code.
| XML source | JSON output |
|---|---|
| Attributes on an element | Grouped under an @attributes object on that element |
| Element with only text content | A bare string value |
| Element with attributes or children plus text | Direct text stored under #text |
| Single child element | A single value (not an array) |
| Multiple siblings with the same name | A JSON array in document order |
| Namespace prefix such as soap:Body | Preserved verbatim in element and attribute names |
| Empty element with no attributes | An empty string |
| Empty element with attributes | An object containing only @attributes |
| CDATA section | Text content contributed to #text |
| Comments and processing instructions | Not copied into JSON |
Two consequences follow directly from that table. First, lexical values such as identifiers with leading zeros, version strings like "01.02", and numeric-looking postal codes stay as JSON strings — the converter does not infer numbers, booleans, or nulls, because silently changing a text token into 1.02 or true can corrupt data that the receiving system already treats as text. Second, repeated siblings always become arrays, never nested single objects, so a REST endpoint that expects a single value will not silently receive an array from a document with duplicate names.
What the Converter Deliberately Excludes
Several behaviors are intentional rather than accidental, and they affect whether the tool is the right choice for a given Notepad++ workflow.
- No DOCTYPE or external entity resolution. The converter rejects documents that begin with <!DOCTYPE ...> and does not fetch DTDs, schemas, stylesheets, or remote namespaces. This protects you from the class of XML external entity attacks and keeps the conversion local.
- No automatic type coercion. Numbers, booleans, and nulls are never produced from text content. Lexical XML values remain JSON strings.
- No mixed-content interleave. Direct text and child element order inside one element is combined under #text and the child names, but the precise interleaving of text and tags is not preserved.
- No comment or processing instruction pass-through. Comments and <?pi?> directives are dropped during the conversion.
- 200,000-character source limit. Anything larger needs streaming or a dedicated parser in your own application.
If your downstream consumer expects a different convention — always-array children, type inference, comment preservation, or a separate namespace object — you will need to post-process the JSON or pick a library whose defaults match that contract.
Browser Converter vs Notepad++ Plugin: When to Use Which
The right tool depends on document size, integration needs, and how strict your contract is. The table below compares the three workflows readers typically consider when working inside Notepad++.
| Approach | Where conversion runs | Best suited for | Main limitation |
|---|---|---|---|
| Browser-based XML to JSON Converter | Local browser tab using DOMParser | API samples, configuration inspection, small data migrations, test fixtures | 200,000-character source cap and no lossless mixed-content preservation |
| Notepad++ XML Tools plugin | Inside the editor process | Pretty-printing, XPath queries, and quick JSON view of an already-JSON file | Limited built-in XML-to-JSON transformation; XML must be syntactically valid |
| Manual find-and-replace in Notepad++ | Inside the editor buffer | One-off tweaks on a tiny fragment with no attributes, namespaces, or repeats | Breaks silently on attributes, repeated tags, CDATA, and mixed content |
For the common case — an API sample, a configuration file, a SOAP envelope fragment, or a test fixture that you opened in Notepad++ for editing — the browser workflow keeps the document on your machine, applies a documented mapping, and returns JSON you can paste straight back into the editor without installing anything new. If your document exceeds the input cap, or if lossless mixed-content preservation is required, move the conversion into a version-controlled parser rather than relying on either the plugin or find-and-replace.