Text to speech · English
Pāṇini TTS speaks English in natural, conversational voices, and the same voice can carry on in any of the 250+ languages Pāṇini TTS speaks, at the same price.
Your appointment with Dr. Patel is confirmed for Thursday, October twenty-ninth, at three thirty in the afternoon. We'll text you a reminder the day before, and you can reply to reschedule anytime.
Voices
Free to play in your browser without an account, up to 220 characters at a time. To save the audio as a file, sign up free for 10,000 characters and one voice clone, no card required: the dashboard saves WAV and the API returns MP3.
Making a video? See AI voice-over for YouTube and Reels. The audio is yours to use on monetised channels.
Last verified 24 October 2026
Charlotte, a native English platform voice, reads the playground above. Any Sonex Labs voice can also read English, keeping its own accent, and a voice cloned from a 10-second recording of a English speaker carries that speaker's accent.
Sign up free, then send English text to the API with "output_format": "mp3" and save the file, or generate clips in the dashboard and download them. Scripts longer than the playground's 220 characters work the same way.
About English
In English, the accent often matters as much as the words. A caller in Texas, Manchester, Lagos or Bengaluru reads the same sentence but expects to hear it differently: rhotic or non-rhotic r, "tomayto" or "tomahto", the stress of Nigerian English or the rhythm of Indian English. Charlotte, a native English platform voice, reads the samples on this page. If your callers should hear their own accent, clone a local speaker from a 10-second sample, and for India see the separate Indian English page.
English is also the language most often mixed into others. Spanglish in Miami, Taglish in Manila and Hinglish in Delhi all borrow English words mid-sentence. Pāṇini reads code-mixed text in one voice, so a brand that answers in English in one country and Spanish or Hindi in the next can keep one voice, and one price, across all of them.
Use cases
One voice agent answers customers in the US, UK, Australia and Nigeria, with a cloned local voice where the accent matters.
Appointment, delivery and payment calls for clinics, couriers and subscription businesses, clear on 8 kHz phone lines.
Course narration, explainers and audiobooks, with one cloned narrator who can also record the Spanish or French edition.
Commercial use
The full wording is in our terms of service.
YouTube
Yes, AI voices are allowed. What YouTube limits is mass-produced, repetitive content: videos made from a template with little original work. Its July 2025 update renamed that rule from “repetitious” to “inauthentic” content (YouTube’s monetisation policies).
Write your own script, add your own research or editing, and keep one consistent voice for the channel. Where a realistic AI voice could mislead viewers, use YouTube’s altered or synthetic content label. The monetisation decision is always YouTube’s.
Voice cloning
Clone your voice from a 10-second recording. Your clone speaks English, and every other language Pāṇini supports, in your own voice. The language comes from the text you type, so a clone recorded in English or Hindi can read a English script.
Your accent comes with it: a clone sounds like you speaking English, not like a different native speaker. Every free account includes one voice clone. Clone only your own voice, or a voice whose owner has agreed.
API
One request returns English audio as MP3. The language is detected from the text, so no language setting is needed. Pāṇini TTS starts streaming audio in under 200 ms (time to first byte).
1curl https://api.sonexlabs.com/v1/speech \2 --header 'Authorization: Bearer YOUR_API_KEY' \3 --header 'Content-Type: application/json' \4 --data '{"text": "Your appointment with Dr. Patel is confirmed for Thursday, October twenty-ninth, at three thirty in the afternoon. We'll text you a reminder the day before, and you can reply to reschedule anytime.", "output_format": "mp3"}' \5 --output english.mp3FAQ
Yes. The playground on this page reads up to 220 characters of English at a time with no account. Sign up free for 10,000 characters and one voice clone, no card; after that it costs $0.03125 per 1,000 characters.
Yes, after free sign-up. The playground on this page plays audio in your browser only, up to 220 characters at a time, so you can check the voice first. Sign up free (10,000 characters and one voice clone, no card): the dashboard saves each clip as a WAV file with Download audio, and the API returns MP3 when you set "output_format": "mp3".
Charlotte, who reads these samples, is a native English voice. For a specific accent, such as Australian or Nigerian English, clone a speaker with that accent from a 10-second sample. Indian English has its own page and native voice.
Yes. Any Sonex Labs voice can speak any supported language, and a cloned voice carries across languages too, so your brand keeps one voice in every market.
$0.03125 per 1,000 characters, the same as every language. The first 10,000 characters and one voice clone are free, with no card.
Yes. The first audio arrives in under 200 ms, and Pāṇini is trained on 8 kHz phone audio, so it holds up on real phone calls.
Yes. Audio you generate, on the free tier or with paid credits, can be used on monetised YouTube channels, Shorts, Reels and in ads, with no attribution. YouTube limits mass-produced, repetitive videos, not AI voices, so write your own script and keep your edits original. The monetisation decision is YouTube's.
The audio you generate is yours to use, including commercially, with no attribution and no royalties to Sonex Labs. You are responsible for the script itself: if you read someone else's text, you need their permission.
Yes. A Sonex voice clone is not tied to the language it was recorded in. Type a English script and your clone reads it in your own voice, with English pronunciation. Your natural accent carries over, so it sounds like you speaking English.
More languages
See text to speech in every language, the full list of 250+ languages, pricing, the Pāṇini TTS API, or transcribe English audio with Valmiki speech to text.
10,000 free text-to-speech characters and one free voice clone that speaks every language, no card required. Every language is billed at the same rate.