Does it matter what the data URI's MIME type says?

No, the MIME type portion (e.g. application/xml) is ignored, only the Base64 payload after the comma is decoded.

Can I paste a bare Base64 string instead of a full data: URI?

Yes, if the input doesn't start with "data:", it's treated as a raw Base64 string and decoded directly.

What happens if the decoded content isn't well-formed XML?

You'll see the exact well-formedness error, the same as pasting invalid XML into the XML Validator.

Data URI to XML Converter - Convert Online

Overview

Introduction

A data URI embedded in a stylesheet, an HTML attribute, or a config value can be hard to read at a glance.

This tool decodes it back to plain XML.

What Is Data URI to XML Converter?

A thin wrapper around this category's existing Base64 decoder.

An optional data:...;base64, prefix is stripped, and the remainder is decoded and pretty-printed as XML.

How Data URI to XML Converter Works

If the input starts with "data:", everything up to and including the first comma is discarded.

The remaining text is decoded as Base64 and validated/pretty-printed as XML, the same as the Base64 to XML Converter.

When To Use Data URI to XML Converter

Use it to inspect the actual XML content behind a data URI found in an HTML attribute, CSS file, or config value.

It's also useful for debugging why an embedded XML resource isn't rendering as expected.

Often used alongside XML to Data URI Converter and Base64 to XML Converter.

Features

Advantages

Works with either a full data: URI or a bare Base64 string.
Runs entirely client-side.
Pretty-prints the result, so the decoded XML is immediately readable.

Limitations

Only the Base64 payload is used; a data URI using URL-encoding instead of Base64 (data:...,%3C...) isn't supported by this tool.
The MIME type in the original data URI isn't validated, only extracted content that happens to be well-formed XML will decode successfully.

Examples

Decoding a data URI

Input

data:application/xml;base64,PGEvPg==

Output

<a />

The data: prefix is stripped and the remaining Base64 is decoded.

Best Practices & Notes

Best Practices

If decoding fails, confirm the data URI actually uses ;base64, and not URL-percent-encoding.
Trim surrounding quotes if you copied the URI directly out of an HTML attribute or CSS file.
Use XML to Data URI Converter to re-encode after making changes.

Developer Notes

This is a one-line wrapper that strips a `data:...;base64,` prefix (if present) before delegating to `base64ToXml`; no separate decoding logic exists here.

Data URI to XML Converter Use Cases

Inspecting the XML behind a data URI found in HTML, CSS, or a config file
Debugging why an embedded XML resource isn't rendering as expected
Recovering a readable copy of XML data that was only ever embedded as a data URI

Common Mistakes

Pasting a URL-encoded (non-Base64) data URI, which this tool doesn't decode.
Leaving surrounding quotes from the source HTML/CSS attribute in the pasted value.

Tips

Use Base64 to XML Converter directly if you already have the bare Base64 without the data: prefix.
Check the FAQ above if the output doesn't look like what you expected.

Data URI to XML Converter