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---
source: https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URLs
obj: concept
---
# Data URLs
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**Data URLs**, URLs prefixed with the `data:` scheme, allow content creators to embed small files inline in documents.
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## Syntax
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Data URLs are composed of four parts: a prefix (`data:`), a [MIME ](../files/MIME.md )-type indicating the type of data, an optional `base64` token if non-textual, and the data itself:
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`data:[<mediatype>][;base64],<data>`
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The `mediatype` is a [MIME ](../files/MIME.md ) type string, such as `'image/jpeg'` for a JPEG image file. If omitted, defaults to `text/plain;charset=US-ASCII`
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The image below is actually a data url:
