XML files: identify, open and convert

XML describes and exchanges structured information using elements, attributes and text. A generic XML tool can read its syntax, but the application determines what the data means and how it is used.

Choose an online XML viewer and check its supported inputs and file handling before opening the file. Do not assume that processing stays on your device. Viewing the structure does not provide the functions of the application that created the data.

Use the Open command in a generic XML editor or an application intended for the file's data. If you need application-specific functions, use the relevant application; a generic editor handles XML syntax.

Select the file through the Open command in an XML editor for macOS or an application that understands its data. Generic XML support alone does not guarantee application-specific interpretation.

Choose an XML viewer or a relevant application that explicitly supports your phone, then use its file-opening control. Check that the app lists your phone's operating system and the file size it accepts.

Use an XML parser or editor to locate syntax problems. Check for a single root element, correctly nested elements and matching start and end tag names. Correcting syntax does not confirm that the data meets an application's requirements.

Check that the actual byte encoding agrees with the encoding declaration. XML processors must support UTF-8 and UTF-16, but other encodings are not mandatory. A mismatch can cause a fatal parsing error; changing only the declaration does not convert the bytes.

Use XML when you need to preserve element hierarchy and attributes. A text-only export may suit reading the words, but without mapping rules it can lose structural and mixed-content relationships.

Define how repeated and nested elements, attributes and mixed text map to rows and columns. A simple table may not preserve all relationships. Check the converter's supported mapping and compare the result with the original XML.

Use an explicit mapping that distinguishes attributes from elements and retains hierarchy and mixed-content order where needed. Do not assume a converter preserves these relationships by default; inspect its mapping and the resulting data.

Safety depends partly on how the tool parses XML. External entities can expose files or trigger network requests, and entity expansion can exhaust resources. Use a parser with unnecessary DTD and external entity processing disabled, as OWASP recommends.

No guarantee applies. XML parsing normalizes line endings and attribute values, and processors may omit comments from the information supplied to applications. Keep the original if exact formatting, comments or byte identity matter.