1,000+
Voices in one API
Text to speech API.
Build it in.
Human-grade voiceovers, accessible from your product. Generate speech with 1,000+ voices across 142+ languages from one REST API.
Trusted by leading organizations
Creators, educators, and teams use Listnr for realistic voice content.
REST
One request. Spoken audio.
Call Listnr from your backend or app. Send text, pick a voice, and receive production audio in the same stack you already use in Studio.
Wide range of voices and languages
REST access to 1,000+ voices across 142+ languages and accents.
High-fidelity AI voices
Lifelike output for products, IVR, learning platforms, and media apps.
Advanced controls
Pronunciation, style, pauses, pitch, and long-form generation where the selected voice supports it.
Built for scale
Throughput for streaming, customer support, and high-volume content pipelines.
listnr-api
fetch('https://api.listnr.com/v1/tts', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Bearer API_KEY_HERE'
},
body: JSON.stringify({
text: 'Hello, world!',
voice_id: '1',
output_format: 'mp3'
})
})Three steps
How to use the text to speech API
Create a key in Listnr Studio, send a request, and drop spoken audio into your product.
142+
Languages and accents
MP3 / WAV
Production formats
01
Get an API key
Sign in to Listnr Studio, create an API key, and keep it private. Use it as a bearer token in requests.
02
Send text and a voice
POST your script with a voice ID and output format. Choose language, style, and pronunciation where the selected voice supports it.
03
Receive audio
Get MP3 or WAV back for playback, storage, or the rest of your pipeline. Stream when your product needs spoken audio on demand.
Key features of the API
Natural speech, style controls, and one REST integration for products that need spoken audio.
Natural voices
Generate human-sounding speech from 1,000+ voices across 142+ languages and accents.
Emotion and style
Shape delivery with emotion, pacing, and pronunciation controls where the selected voice supports them.
URL to audio
Turn a URL or script into spoken audio from your product, without a separate recording session.
One API for production
Use a single REST integration for Listnr voices instead of wiring a different provider for every language or format.
Where teams use the API
Generate speech for products, phone systems, lessons, and media without a booth for every line.
Apps and products
Add spoken replies, onboarding, and in-product narration without recording every line.
Learn moreIVR and phone
Generate prompts and updates for phone trees in a consistent branded voice.
Learn moreLearning platforms
Ship course audio, lesson updates, and localized narration from the same voice stack.
Learn moreVideo and media
Create voiceovers for explainers, ads, and social clips from your production pipeline.
Learn moreCustomer support
Keep help content and automated spoken replies consistent across channels.
Learn moreAccessibility
Let people listen to product copy, docs, and articles instead of reading on a screen.
Learn moreEnterprise Ready
Built for scale and enterprise
Access Listnr voice generation, voice cloning, APIs, team workflows, and support tailored for your organization.
Custom SLAs
Priority onboarding/support
Early access to voice/video workflows
Dedicated API throughput
Team seats and roles
Volume pricing
Secure by default
Controlled access patterns for teams building approved voice workflows.
Privacy ready
Consent-led voice cloning and privacy-aware production for organization use.
Low-latency voice generation
Voice generation and API throughput designed for larger content operations.
Custom integrations
Connect Listnr voice generation into your production stack and internal tools.
G2
Users Love Us
G2 Reviews
Listnr AICustomer testimonials
See why creators, publishers, and teams use Listnr for realistic AI voiceovers.
Shubham uses Listnr as a single place to create client voiceovers and presentation audio, with multiple languages, voice options, and responsive customer support.
SM
Shubham M.
Assistant Manager · G2 reviewer
Jeffery highlights Listnr's natural-sounding voices, practical limits, and straightforward text-to-speech workflow.
JS
Jeffery S.
Senior Advisor · G2 review
Dan values the time saved when turning existing written posts into natural-sounding audio content.
DR
Dan R.
CEO · G2 review
Ach points to the broad choice of languages, accents, and reading styles available for believable video voiceovers.
AH
Ach H.
Video Marketer · G2 review
Text to speech API
Frequently asked questions
The Listnr TTS API converts text to natural-sounding speech from your product. It covers 1,000+ voices across 142+ languages, with controls for style, pronunciation, and long-form generation where the selected voice supports it.
Sign in to Listnr Studio, open billing or developer settings, and create an API key. Use it as a bearer token in requests. Keep keys private and rotate them if they leak.
Common outputs include MP3 and WAV. Choose the format that fits your pipeline, from in-app playback to broadcast exports.
Voice cloning is available for voices you own or have permission to use. Create the clone in Listnr Studio, then generate speech with that voice from the API.
Limits follow your Listnr plan. Free accounts have a small daily quota. Paid plans raise throughput. Enterprise plans can include dedicated capacity.
API request examples and SDKs live in the Listnr text-to-speech API GitHub repository. Get a key in Listnr Studio, then follow the docs to send your first request.
TTS Editor
Script
Turn this launch script into a warm, confident voiceover with clean pacing and a natural close.
Generate audio