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ElevenLabs integration

Powered by ElevenLabs technology, this API generates natural-sounding speech from text with customizable voice settings and multi-language support.
ElevenLabs Voiceover is a text-to-speech API that converts text into natural-sounding audio using AI voice synthesis. Generate professional voiceovers for videos, podcasts, presentations, e-learning content, and accessibility applications. The API supports up to 40,000 characters per request with the Turbo model and delivers high-quality audio output suitable for production use.

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Key capabilities

  • AI model: eleven_turbo_v2_5 optimized for fast, high-quality generation (up to 10,000 characters)
  • Voice customization: Control stability (0-1), similarity boost (0-1), and speech speed (0.7-1.2x)
  • Speaker boost: Enhanced voice clarity and presence in generated audio
  • Multi-language support: UTF-8 text including accented letters and non-Latin scripts
  • Maximum text length: Up to 40,000 characters per request
  • Async processing: Webhook notifications or polling for task completion

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Use cases

  • Video production: Create voiceovers for marketing videos, tutorials, and social media content
  • Podcast production: Generate intro/outro narration or read content aloud
  • E-learning: Convert educational materials to audio for accessibility and engagement
  • Accessibility: Provide audio versions of written content for visually impaired users
  • IVR systems: Generate professional voice prompts for phone systems
  • Audiobook creation: Convert written content into natural-sounding audio narration

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Generate voiceover with ElevenLabs

Create voiceovers by submitting text to the API with a voice ID. The service returns a task ID for async polling or webhook notification.

POST /v1/ai/voiceover

Create a new voiceover generation task

GET /v1/ai/voiceover

List all voiceover tasks with status

GET /v1/ai/voiceover/{task-id}

Get task status and results by ID

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Parameters

ParameterTypeRequiredDefaultDescription
textstringYes-Text to convert to speech. UTF-8 supported, 1-40,000 characters
voice_idstringYes-ElevenLabs voice ID from the voice library
modelstringNo"eleven_turbo_v2_5"AI model for speech synthesis
stabilitynumberNo0.5Voice consistency: 0.0 (expressive) to 1.0 (stable)
similarity_boostnumberNo0.2Voice matching: 0.0 (varied) to 1.0 (close match, may have artifacts)
speednumberNo1.0Speech rate: 0.7 (30% slower) to 1.2 (20% faster)
use_speaker_boostbooleanNotrueEnable enhanced voice clarity and presence
webhook_urlstringNo-URL for task completion notification

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Frequently Asked Questions

ElevenLabs Voiceover is a text-to-speech API that converts text into natural-sounding audio using AI voice synthesis. You submit text with a voice ID, receive a task ID immediately, then poll for results or receive a webhook notification when processing completes. The output is a high-quality audio file containing the synthesized speech.
The eleven_turbo_v2_5 model is used, optimized for fast, high-quality speech synthesis. It supports up to 10,000 characters per request and is ideal for both real-time applications and production use.
Voice IDs are unique identifiers for each voice in the ElevenLabs voice library. You can find voice IDs in the ElevenLabs Voice Library. A common example voice ID is 21m00Tcm4TlvDq8ikWAM (Rachel - a calm, professional female voice).
stability (0-1) controls voice consistency: lower values produce more expressive, varied speech; higher values produce more consistent, stable output. similarity_boost (0-1) controls how closely the output matches the original voice sample: higher values match more closely but may introduce artifacts.
ElevenLabs Voiceover supports multiple languages through UTF-8 text encoding, including accented letters (e.g., e, n, u) and non-Latin scripts. The specific languages available depend on the voice selected - many voices support multiple languages natively.
Processing time depends on text length and model selection. The eleven_turbo_v2_5 model is optimized for speed and generates audio faster. For production workflows with longer texts, use webhooks instead of polling to receive completion notifications.
Rate limits vary by subscription tier. See Rate Limits for current limits by tier. For high-volume production use, consider using webhooks for efficient task management.

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Best practices

  • Voice selection: Choose a voice appropriate for your content and audience
  • Model: The eleven_turbo_v2_5 model provides fast, high-quality results for all use cases
  • Stability tuning: Start with 0.5, decrease for more expressive reads, increase for more consistent output
  • Speed adjustment: Use 0.7-0.9 for slower, clearer speech; 1.0-1.2 for faster narration
  • Text preparation: Use proper punctuation for natural pauses; avoid very long sentences
  • Production integration: Use webhooks instead of polling for scalable applications
  • Error handling: Implement retry logic with exponential backoff for 503 errors