# rpk connect blobl server

> For the complete documentation index, see [llms.txt](https://docs.redpanda.com/llms.txt). Component-specific: [streaming-full.txt](https://docs.redpanda.com/streaming-full.txt)

---
title: rpk connect blobl server
latest-operator-version: v26.1.4
# EOL = End-of-Life (support lifecycle status)
page-is-nearing-eol: "false"
page-is-past-eol: "true"
page-eol-date: April 30, 2025
latest-console-tag: v3.7.3
latest-connect-version: 4.93.0
docname: rpk/rpk-connect/rpk-connect-blobl-server
page-component-name: streaming
page-version: "24.1"
page-component-version: "24.1"
page-component-title: Streaming
page-relative-src-path: rpk/rpk-connect/rpk-connect-blobl-server.adoc
page-edit-url: https://github.com/redpanda-data/docs/edit/v/24.1/modules/reference/pages/rpk/rpk-connect/rpk-connect-blobl-server.adoc
page-git-created-date: "2024-05-30"
page-git-modified-date: "2024-05-30"
support-status: past end-of-life
---

<!-- Source: https://docs.redpanda.com/streaming/24.1/reference/rpk/rpk-connect/rpk-connect-blobl-server.md -->

Run a web server that provides an interactive application for writing and testing Bloblang mappings.

## [](#usage)Usage

```bash
rpk connect blobl server [command options] [arguments...]
```

## [](#flags)Flags

| Value | Type | Description |
| --- | --- | --- |
| --host | - | The host to bind to (default: "localhost"). |
| --port, -p | - | The port to bind to (default: "4195"). |
| --no-open, -n | - | Do not open the app in the browser automatically (default: false). |
| --mapping-file, -m | - | An optional path to a mapping file to load as the initial mapping within the app. |
| --input-file, -i | - | An optional path to an input file to load as the initial input to the mapping within the app. |
| --write, -w | - | When editing a mapping or input file, write changes made back to the respective source file. If the file does not exist, it is created (default: false). |
| --help, -h | - | When editing a mapping or input file, write changes made back to the respective source file. If the file does not exist, it is created (default: false). |