---
title: "HeyGen TTS"
description: "Speak a script in a voice you cloned with HeyGen Voice Clone, on HeyGen Voice 1. Wire the clone into voice_id, or pick one of your HeyGen voices."
updated: 2026-10-14
---

# HeyGen TTS

**Badge:** Direct  
**Node type:** `audio:heygen_tts`  
**Category:** `audio`

## Description

Speak a script in a voice you cloned with HeyGen Voice Clone, on HeyGen Voice 1. Wire the clone into voice_id, or pick one of your HeyGen voices.

## Pricing

- **Cost:** 1.5 credits per estimated second of speech, 5 minimum: a 3-second line is 5 credits, a 15-second read 23, a 50-second read 75. Estimated from the text (characters / 15), never re-priced from the audio.

## Canvas ports

These appear as port handles on the left side of the node.

| ID         | Label     | Details                                                                                                   |
| ---------- | --------- | --------------------------------------------------------------------------------------------------------- |
| `text`     | **Text**  | `TEXT` _(required)_ — Plain prose, up to 750 characters per run, priced by length. No SSML or break tags. |
| `voice_id` | **Voice** | `TEXT` _(required)_ — Connect the HeyGen Voice Clone node, or pick one of your HeyGen voices.             |

## Sidebar config

These render as form fields in the right-side config panel when the node is selected.

| ID                     | Label              | Details                                                                                                                 |
| ---------------------- | ------------------ | ----------------------------------------------------------------------------------------------------------------------- |
| `model`                | **Model**          | `TEXT` · options: `heygen-voice-1`, `heygen-voice-1-turbo`                                                              |
| `language`             | **Language**       | `TEXT` · options: `auto`, `ar`, `be`, `bg`, `ca`, +35 — Language of the text. Auto lets HeyGen detect it from the text. |
| `expressiveness_boost` | **Expressiveness** | `NUMBER` · `0…1` — 0 to 1. 0.5 keeps closest to the cloned voice (HeyGen Studio default); 1 is more animated.           |

## Outputs

| ID      | Label     | Type    |
| ------- | --------- | ------- |
| `audio` | **Audio** | `AUDIO` |

## How to use it

Wire a [HeyGen Voice Clone](/docs/nodes/audio--heygen_voice_clone) node's
**Voice ID** into **Voice**, or pick one of your saved HeyGen voices in the
sidebar. Wire a script into **Text** and click Run Model. The audio player
shows up on the node when the run finishes. The file is a WAV stored on
Wireflow's CDN.

This node speaks only voices you cloned with HeyGen Voice Clone. Another
account's voice, or a HeyGen voice that was not cloned in Wireflow, is refused
before anything is charged.

## What a run costs

Priced by length: 1.5 credits per estimated second of speech, with a 5-credit
minimum. A 3-second line costs 5 credits, a 15-second read 23, a 50-second
read 75. The estimate is the character count divided by 15, where digits and
symbols count 5 each and Chinese, Japanese and Korean characters count 3,
because they take longer to say. The canvas shows the price of the text you
wired from a Text Input. When the words are not known before the run (they
come from a model, or an API call, automation, template or blueprint wire
replaces the Text Input), it shows the most a run can cost (75 credits), and
the charge follows the text that actually runs.

A run reads up to 750 characters, about 50 seconds of speech. Longer text is
refused before anything is charged, so split a long script into parts and join
the audio.

HeyGen bills speech by the minute of audio it makes, not by character. The
price follows HeyGen's published HeyGen Voice 1 speech rate.

## Settings

- **Model**: HeyGen Voice 1, or Voice 1 Turbo for lower latency.
- **Expressiveness** defaults to 0.5, which keeps closest to the cloned voice.
  1 is more animated.
- **Language** is detected from the text. Set it when the text is short or
  mixes languages.

Plain prose only: no SSML, no break tags.

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_Auto-generated from the Wireflow node registry._

Last updated: 2026-10-14

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Documentation index: fetch https://www.wireflow.ai/llms.txt for the full list of Wireflow docs.