# rpk connect blobl

> 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
latest-redpanda-tag: v26.1.14
latest-console-tag: v3.10.0
latest-operator-version: v26.2.1
# EOL = End-of-Life (support lifecycle status)
page-is-nearing-eol: "false"
page-is-past-eol: "false"
page-eol-date: March 31, 2027
latest-connect-version: 4.104.0
docname: rpk/rpk-connect/rpk-connect-blobl
page-component-name: streaming
page-version: "26.1"
page-component-version: "26.1"
page-component-title: Streaming
page-relative-src-path: rpk/rpk-connect/rpk-connect-blobl.adoc
page-edit-url: https://github.com/redpanda-data/docs/edit/v/26.1/modules/reference/pages/rpk/rpk-connect/rpk-connect-blobl.adoc
description: Execute Bloblang mappings from the command line. Provides a convenient tool for mapping JSON documents.
page-git-created-date: "2026-07-17"
page-git-modified-date: "2026-07-17"
support-status: supported
---

<!-- Source: https://docs.redpanda.com/streaming/26.1/reference/rpk/rpk-connect/rpk-connect-blobl.md -->

Execute Bloblang mappings from the command line. Provides a convenient tool for mapping JSON documents.

## [](#usage)Usage

```bash
rpk connect blobl [flags]
```

## [](#examples)Examples

This section provides examples of how to use `rpk connect blobl`.

Map JSON documents from stdin.

```bash
cat documents.jsonl | rpk connect blobl 'foo.bar.map_each(this.uppercase())'
```

Use a mapping file.

```bash
echo '{"foo":"bar"}' | rpk connect blobl -f ./mapping.blobl
```

Process input from a file.

```bash
rpk connect blobl -i input.jsonl -f ./mapping.blobl
```

## [](#subcommands)Subcommands

| Command | Description |
| --- | --- |
| rpk connect blobl server | Run a web server that provides an interactive application for writing and testing Bloblang mappings. |

## [](#global-flags)Global flags

| Value | Type | Description |
| --- | --- | --- |
| --config | string | Redpanda or rpk config file; default search paths are ~/.config/rpk/rpk.yaml, $PWD/redpanda.yaml, and /etc/redpanda/redpanda.yaml. |
| -X, --config-opt | stringArray | Override rpk configuration settings; -X help for detail or -X list for terser detail. |
| --ignore-profile | bool | Ignore rpk.yaml and redpanda.yaml; use default settings. |
| --profile | string | rpk profile to use. |
| -v, --verbose | bool | Enable verbose logging. |

## [](#suggested-reading)Suggested reading

-   [Bloblang](https://docs.redpanda.com/connect/guides/bloblang/about/)