How do I encode XML to Base64?

Paste your XML and click Encode. The tool checks the XML is well-formed, then converts it to a UTF-8-safe Base64 string suitable for embedding in headers, SOAP envelopes, SAML assertions or config.

Where is Base64-encoded XML actually used?

It is common in enterprise messaging: SAML SSO responses are Base64-encoded XML, SOAP attachments and signatures embed Base64 blobs, and many APIs accept an XML body encoded as a single Base64 field. Encoding avoids escaping the angle brackets and quotes across transports.

Does the encoder preserve the XML declaration and namespaces?

Yes. Base64 encodes the exact bytes you paste, including the declaration, namespaces and attributes — decoding reproduces the document character-for-character. The tool only validates well-formedness; it does not rewrite your markup.

Is Base64 the same as encryption for XML?

No. Base64 is reversible and provides no security. For signed or encrypted XML (XML-DSig / XML-Enc), apply those standards first, then Base64-encode the result for transport.

No. Validation and encoding happen in your browser; your documents never leave your device.

XML to Base64 - Encode XML to Base64 Online Free

XML to Base64 — encode XML for enterprise transport

XML carries a lot of markup characters — angle brackets, quotes, ampersands — that are awkward to pass through headers, form fields and JSON. Base64 turns the whole document into one safe, text-only string. This tool validates that your XML is well-formed, then encodes it UTF-8-safely in your browser, preserving the declaration and namespaces exactly.

Common uses

SAML SSO — the SAMLResponse is Base64-encoded XML.
SOAP — embedding attachments, certificates or signed blobs.
Config & transport — pass an XML document as a single field without escaping.

⚠️ Encoding is not signing or encryption

Base64 is reversible and offers no integrity or confidentiality. For secure XML use XML-DSig / XML-Enc, then Base64 the result. Reverse this with Base64 to XML.

Related tools

Base64 to XML — decode it back
JSON to Base64 · YAML to Base64
XML Validator · XML Formatter

Free XML to Base64 encoder — UTF-8-safe, validates well-formedness first

XML to Base64 — encode XML for enterprise transport

Common uses

⚠️ Encoding is not signing or encryption

Related tools