---
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title: DataWeave Binary (dwb) Format
collection: mulesoft
version: current
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source_site: docs.mulesoft.com
content_type: documentation
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description: MuleSoft Documentation Site
release: "2.4"
latest: false
---
---
product: DataWeave
version: 2.4
keywords: format, dwb, application/dwb, application/dwb
---

# DataWeave Binary (dwb) Format

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

MIME type: `application/dwb`

ID: `dwb`

TODO FOR 2.4?

## Configuration Properties

DataWeave supports the following configuration properties for this format.

### Reader Properties

This format accepts properties that provide instructions for reading input data.

<table><colgroup><col> <col> <col> <col></colgroup><thead><tr><th>Parameter</th><th>Type</th><th>Default</th><th>Description</th></tr></thead><tbody><tr><td><p><code>indexedReader</code></p></td><td><p><code>Boolean</code></p></td><td><p><code>true</code></p></td><td><div><div><p>Uses the indexed reader by default when reaching the threshold. Supports US-ASCII, UTF-8 and ISO-8859-1 encodings only. For other encodings, DataWeave uses the in-memory reader.</p></div><div><p>Valid values are <code>true</code> or <code>false</code>.</p></div></div></td></tr></tbody></table>

### Writer Properties

This format accepts properties that provide instructions for writing output data.

<table><colgroup><col> <col> <col> <col></colgroup><thead><tr><th>Parameter</th><th>Type</th><th>Default</th><th>Description</th></tr></thead><tbody><tr><td><p><code>bufferSize</code></p></td><td><p><code>Number</code></p></td><td><p><code>8192</code></p></td><td><div><div><p>Size of the buffer writer.</p></div></div></td></tr><tr><td><p><code>deferred</code></p></td><td><p><code>Boolean</code></p></td><td><p><code>false</code></p></td><td><div><div><p>Generates the output as a data stream when set to <code>true</code>, and defers the script’s execution until consumed.</p></div><div><p>Valid values are <code>true</code> or <code>false</code>.</p></div></div></td></tr><tr><td><p><code>writeIndex</code></p></td><td><p><code>Boolean</code></p></td><td><p><code>false</code></p></td><td><div><div><p>If it should add the token and hierarchical index at the end to avoid parsing again when this is read</p></div><div><p>Valid values are <code>true</code> or <code>false</code>.</p></div></div></td></tr></tbody></table>

## Supported MIME Types

This format supports the following MIME types.

<table><colgroup><col></colgroup><thead><tr><th>MIME Type</th></tr></thead><tbody><tr><td><p><code>application/dwb</code></p></td></tr></tbody></table>