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Webhook that turns text into speech with ElevenLabs

by Mindketn8n workflowProductivity
Newversion 1 · updated
Nodes5Apps1Like

Overview

  1. Webhook
  2. If params correct
  3. Generate voice
  4. Error
  5. Respond to Webhook
Webhook that turns text into speech with ElevenLabs, picture 1
‹2 / 2›

An n8n workflow that gives you a web address for text to speech. Send it a voice id and some text, and the reply is an audio file made by ElevenLabs.

Webhook that turns text into speech with ElevenLabs is an n8n workflow in the Productivity category, listed by Mindket. It is free. This is version 1, last updated on . Download it on this page or copy its JSON, then import it into an n8n canvas. Nothing runs until you activate it in n8n.

At a glance

Runs in
  • n8n Cloud or your own n8n server: import the file, activate it and use the production URL
  • A script: send the request with curl or any HTTP library and save the reply as an MP3
  • Another workflow: call the address from an HTTP Request node that posts voice_id and text
  • A form or an app: any tool that posts JSON will do

Platform

n8nWorkflow automation, in n8n’s cloud or on your own server
Connects 1 app

How it works

Trigger

Web request

It starts when a POST reaches the generate-voice webhook with:

  • voice_id, the ElevenLabs voice to use
  • text, the words to read aloud

Actions

  1. The workflow checks that both voice_id and text came in
  2. It posts the text to ElevenLabs for that voice, with your key in the xi-api-key header
  3. ElevenLabs returns the spoken audio
  4. The webhook answers with the audio file, or with an Invalid inputs error when a field is missing

Result

An audio file of your text read aloud in the chosen voice, returned as the reply

Integrations

What you need before you start.

ElevenLabs

Text to speech

Reads the text aloud in the chosen voice and returns the audio.

NeedsElevenLabs API key and a voice id

Workflow check

Checked by Mindket on 13 Nov 2026

Steps
5 steps, starting when its webhook is called
AI
No step calls an AI model
Sign-ins
Signs in to: api.elevenlabs.io
API keys
No API key is left in the file
Step types
Mindket’s checker reads all 4 of its step types

Read from the workflow’s file, not from a run.

About

What it is

This n8n workflow is a small text to speech service. Any tool that can send a web request posts a voice id and a piece of text to its address. The workflow asks ElevenLabs to read the text aloud and sends the audio back in the reply. A check turns away a request that lacks either field. Five nodes do the work, beside one sticky note.

Who it suits

Developers and creators who want speech from their own scripts, forms or other workflows without writing a server. Skip it if you need streaming audio or timing data. The reply is one finished file.

Who uses it, and how
IndustryWho uses itHow they use itExample
MediaVideo producersMake a voice-over from a scriptA producer posts a script and saves the MP3 for the edit.
EducationCourse creatorsAdd narration to lessonsA teacher sends each lesson’s text and gets an audio file back.
SoftwareDevelopersGive an app a speech endpoint without an SDKA developer calls the webhook from a form handler.
AccessibilitySite ownersOffer an audio version of an articleAn owner sends an article’s text and stores the MP3.

You need a little n8n and an ElevenLabs key.

Where to use it

Any n8n that can reach ElevenLabs will run it. The audio comes back as the webhook’s reply.

  • n8n Cloud or your own n8n server: import the file, activate it and use the production URL
  • A script: send the request with curl or any HTTP library and save the reply as an MP3
  • Another workflow: call the address from an HTTP Request node that posts voice_id and text
  • A form or an app: any tool that posts JSON will do

Setup

Download saves a zip with workflow.json and Mindket’s setup notes in your downloads folder. Setup is one credential and one activation.

What you need first
NeedDetail
n8nOn n8n Cloud or on a server of your own
ElevenLabsAn account, an API key and the id of a voice
  1. In n8n, create a workflow, open its menu, choose Import from File and pick workflow.json.
  2. Create a Custom Auth credential with {"headers": {"xi-api-key": "<YOUR_ELEVENLABS_API_KEY>"}} and select it in Generate voice.
  3. Activate the workflow and copy the production URL of Webhook. Its path is generate-voice.
  4. Send a POST request with a JSON body that holds voice_id and text, and save the reply as an MP3 file.

How to use it

Post a JSON body with a voice_id and a text. What comes back is the audio. A body that lacks either field gets {"error": "Invalid inputs."}. Send a different voice_id to change the voice.

What to change for a different result
To changeWhere
The voiceThe voice_id you send
The model and the formatAdd model_id or output_format to the body in Generate voice
The addressThe path generate-voice in Webhook
The invalid replyThe body of Error

Example

A course creator posts a voice id and the line Welcome to the course to the webhook.

The reply is an MP3 file of that line in the chosen voice. If ElevenLabs refuses the call, for a wrong voice id or a used-up plan, the run fails and the caller gets an error from n8n instead.

For newcomers and experts

If you are new. A webhook is a web address that starts a workflow when something posts to it. This one waits for the post, runs two steps and answers with a sound file. The voice id picks the voice, and ElevenLabs shows it in the voice’s settings.

For experts. Webhook is set to answer from a Respond to Webhook node, so one of two respond nodes sends the reply. Generate voice is an HTTP Request node. The audio arrives as binary data in the field data, and the success reply sends it. The key sits in a Custom Auth credential.

Where to look closer
NodeWhat it doesWhat to know
If params correctTests that voice_id and text existAn empty string still passes
Generate voicePosts the text to ElevenLabsIt sends only text, so ElevenLabs uses its defaults
Respond to WebhookReturns the audioThe caller has to save the reply as a file
ErrorReplies with a JSON errorThe status is 200 unless you change it

Good to know

The check and the request body needed repairs, and the address is open.

  • Repairs: If params correct compared the plain words voice_id and text, which always exist, so it never failed. It now reads the request body. The JSON body wrapped the text in quotation marks by hand, so a quote or line break broke the call. It now uses JSON.stringify
  • Open address: anyone who has the URL can make audio, and ElevenLabs bills your account for it. Turn on an Authentication option in Webhook, such as Header Auth, and send the secret from your caller
  • Weak check: it tests only that both fields are present. A text of only spaces passes, and ElevenLabs then answers with an error
  • Status: the invalid-input reply is an HTTP 200. In Error, set the response code to 400 if your caller reads the status
  • Defaults: the body sends only text, so ElevenLabs uses the model eleven_multilingual_v2 and the format mp3_44100_128, per its reference read on 12 November 2026. Some formats need a higher plan
  • Billing: ElevenLabs bills the characters you convert, within the limits of your plan
  • Your data: the text goes to ElevenLabs, and your tool receives the audio
  • Credentials: the JSON holds none

README and files

README

Webhook that turns text into speech with ElevenLabs

An n8n workflow that gives you a small web address for text to speech. You send it a voice id and a piece of text. It asks
ElevenLabs to read the text aloud and sends the audio file back in the reply. Any tool that can make a web request can use it.

What is inside

  • workflow.json: the workflow as n8n exports it, 6 nodes, one of them a sticky note. It holds no credential and no key.
  • README.md: these notes.

What we changed from the original copy

  • The credential link on Generate voice is gone. Create your own, as in "Set it up".
  • If params correct compared the plain words voice_id and text, which always exist, so the check never failed. Its two
    conditions now read {{ $json.body.voice_id }} and {{ $json.body.text }}.
  • The JSON body of Generate voice put the text between quotation marks by hand, so a quote or a line break in the text broke
    the request. It now writes the text with JSON.stringify.
  • The file had no settings block. It now sets the usual execution order, v1.
  • The sticky note was a personal note from the author. It is now a short note with the setup.

Before you start

  • An n8n instance.
  • An ElevenLabs account and its API key. ElevenLabs bills the characters you convert, within the limits of your plan.
  • The id of a voice in your ElevenLabs account. You find it in the voice's settings there.

Set it up

  1. In n8n, create a workflow, open its menu and choose Import from File. Pick workflow.json.
  2. Create a Custom Auth credential with this JSON, and select it in Generate voice:
    {"headers": {"xi-api-key": "<YOUR_ELEVENLABS_API_KEY>"}}
  3. Activate the workflow, then copy the production URL from Webhook. Its path is generate-voice.
  4. Send a POST request with a JSON body and save the reply as an MP3 file:
curl -X POST "<YOUR_WEBHOOK_URL>" -H "Content-Type: application/json" -d '{"voice_id": "<YOUR_VOICE_ID>", "text": "Hello from n8n."}' --output speech.mp3

How a run goes

  1. Webhook waits for a POST request on generate-voice. It answers later, from a Respond to Webhook node.
  2. If params correct checks that the body holds a voice_id and a text.
  3. When both are there, Generate voice posts the text to ElevenLabs at /v1/text-to-speech/<voice_id> with your key in the
    xi-api-key header. ElevenLabs sends back audio, which n8n keeps as a binary file.
  4. Respond to Webhook returns that file to the caller.
  5. When one is missing, Error replies with {"error": "Invalid inputs."}.

Change the look

  • The voice: send a different voice_id with each request. Nothing is fixed in the workflow.
  • The model and the format: the body sends only text, so ElevenLabs uses its defaults, the model eleven_multilingual_v2
    and the format mp3_44100_128 (its reference, read on 12 November 2026). Add model_id or output_format to the body in
    Generate voice to change them. Some formats need a higher plan.
  • The path: change generate-voice in Webhook.

Good to know

  • The address is open. Anyone who has the URL can make audio, and ElevenLabs bills your account for it. In Webhook, turn on
    an Authentication option, such as Header Auth, and send the secret from your caller.
  • The check only tests that both fields are present. A text of only spaces, or an empty string, passes, and ElevenLabs then
    answers with an error.
  • The invalid-input reply is an HTTP 200 with a JSON body. In Error, set the response code to 400 if your caller reads the
    status.
  • When ElevenLabs refuses the call, for a wrong voice id or an account out of characters, the run fails and the caller receives
    an error from n8n.
  • Your data: the text goes to ElevenLabs, and your tool receives the audio.
  • Use the voices you have the right to use, and check ElevenLabs's terms for what you may do with the audio.
Files
NOTICE.md  624 B
README.md  4 KB
workflow.json  4 KB

3 files, 9 KB, downloaded as a zip.

What’s new

  • Version 1 · 2026-11-12

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