---
name: Convert a ReadableStream to an ArrayBuffer
---

Bun provides a number of convenience functions for reading the contents of a [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream) into different formats.

```ts
const stream = new ReadableStream();
const buf = await Bun.readableStreamToArrayBuffer(stream);
```

---

See [Docs > API > Utils](/docs/api/utils#bun-readablestreamto) for documentation on Bun's other `ReadableStream` conversion functions.
d class='form'><form method='get'>
<select name='h' onchange='this.form.submit();'>
<option value='dependabot/github_actions/actions/dependency-review-action-4.3.3'>dependabot/github_actions/actions/dependency-review-action-4.3.3</option>
<option value='dependabot/github_actions/aquasecurity/trivy-action-0.22.0'>dependabot/github_actions/aquasecurity/trivy-action-0.22.0</option>
<option value='dependabot/github_actions/codecov/codecov-action-4.5.0'>dependabot/github_actions/codecov/codecov-action-4.5.0</option>
<option value='dependabot/github_actions/github/codeql-action-3.25.10'>dependabot/github_actions/github/codeql-action-3.25.10</option>
<option value='dependabot/go_modules/github.com/Azure/go-autorest/autorest/azure/auth-0.5.13'>dependabot/go_modules/github.com/Azure/go-autorest/autorest/azure/auth-0.5.13</option>
<option value='dependabot/go_modules/github.com/aws/aws-sdk-go-1.54.2'>dependabot/go_modules/github.com/aws/aws-sdk-go-1.54.2</option>
<option value='dependabot/go_modules/go-etcd-io-4cb3a346bb'>dependabot/go_modules/go-etcd-io-4cb3a346bb</option>
<option value='dependabot/go_modules/golang.org/x/crypto-0.24.0'>dependabot/go_modules/golang.org/x/crypto-0.24.0</option>
<option value='dependabot/go_modules/google.golang.org/api-0.184.0'>dependabot/go_modules/google.golang.org/api-0.184.0</option>
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<option value='fallthrough'>fallthrough</option>
<option value='master'>master</option>
<option value='superq/go1.22'>superq/go1.22</option>
<option value='superq/refactor_pbutil'>superq/refactor_pbutil</option>
<option value='torrent'>torrent</option>
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<div class='path'>path: <a href='/ansg191/coredns/log/?h=v1.6.2&amp;follow=1'>root</a>/<a href='/ansg191/coredns/log/plugin?h=v1.6.2&amp;follow=1'>plugin</a>/<a href='/ansg191/coredns/log/plugin/pkg?h=v1.6.2&amp;follow=1'>pkg</a>/<a href='/ansg191/coredns/log/plugin/pkg/up?h=v1.6.2&amp;follow=1'>up</a> (<a href='/ansg191/coredns/log/plugin/pkg/up?h=v1.6.2'>unfollow</a>)</div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/ansg191/coredns/log/plugin/pkg/up?h=v1.6.2&amp;showmsg=1&amp;follow=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2019-08-14 08:10:50 +0000'>2019-08-14</span></td><td><a href='/ansg191/coredns/commit/notes/coredns-1.6.2.md?h=v1.6.2&amp;id=ea0d6abc859a4e23960aa814c2c557710a832bf8&amp;follow=1'>Tweak the notes a bit (#3128)</a></td><td><img src='//www.gravatar.com/avatar/25ba01eee5a1c0e007e810afe805766c?s=13&amp;d=retro' width='13' height='13' alt='Gravatar' /> Miek Gieben
</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2019-08-14 07:56:12 +0000'>2019-08-14</span></td><td><a href='/ansg191/coredns/commit/plugin/route53/route53_test.go?h=v1.6.2&amp;id=fcbe70f4f89609d540f15f27fbf97cb3010771c5&amp;follow=1'>run gofmt -w -s **/*.go (#3126)</a></td><td><img src='//www.gravatar.com/avatar/25ba01eee5a1c0e007e810afe805766c?s=13&amp;d=retro' width='13' height='13' alt='Gravatar' /> Miek Gieben
</td><td>2</td><td><span class='deletions'>-3</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2019-08-13 09:47:23 -0700'>2019-08-13</span></td><td><a href='/ansg191/coredns/commit/plugin/kubernetes/parse.go?h=v1.6.2&amp;id=3c45e55f91d8773b76252ffdc7b7285d12d6a1e5&amp;follow=1'>Update parse.go (#3122)</a></td><td><img src='//www.gravatar.com/avatar/7617d68c1202e4adda3f6b3ac53aca1c?s=13&amp;d=retro' width='13' height='13' alt='Gravatar' /> AllenZMC
</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>