For developers · rolling out
Text to Speech API
Speech studio
32 voices · 18 languages
One endpoint, several engines, credits that never expire. API access is rolling out — in the meantime, every engine it will expose is already testable right here.
How it works
Three steps, about a minute
- 1
Paste or write your text
Drop in a script, a paragraph, or a whole article. Longer text is split into parts automatically and joined back into one file.
- 2
Pick a voice and preview it
Every voice previews before you spend anything, including the paid ones. Filter by language, then hear two or three before committing.
- 3
Generate and download
Audio comes back in seconds as MP3 or WAV, with a commercial licence on every tier — including the free one.
Examples
Hear it on real scripts
Every clip below was generated here on the free tier — no account, no credits. Play one to hear the voice on that kind of writing, or load the script into the generator and make your own version of it.
Phone greeting
IVR or voicemail line — the classic use for a consistent voice.
“Thank you for calling Northgate Supply. Our team is available Monday to Friday, eight until six. For an existing order, press one. For everything else, stay on the line and someone will be with you shortly.”
Product ad
Thirty seconds of ad copy, the hardest thing to read naturally.
“You already own the shoes. That's the annoying part. They're at the back of the cupboard, they still fit, and the only thing standing between you and Saturday morning is the fifteen minutes it takes to find them. We can't help with that. But everything after it, we can.”
Article to audio
Turn something written to be read into something worth listening to.
“Reading aloud is the oldest editing tool there is. The eye forgives a sentence that has no breath in it; the ear refuses. Which is why writers who read their own drafts out loud tend to produce shorter sentences, and why anyone about to publish something long should hear it first.”
Included
What you get
- Free without an account
- Thousands of characters a day as a guest, no sign-up and nothing to install. An account raises the limit; it is not a gate on the tool.
- Commercial use included
- Monetised videos, client work and ads are all fine on every tier. You own what you generate.
- MP3 and WAV export
- MP3 for editors and uploads, WAV where you need uncompressed audio. Speed is adjustable from 0.75× to 1.5× on engines that support it.
- Long text, one file
- Text past the per-request limit is split at sentence boundaries, generated in order, and stitched back into a single download.
- Voices across 18 languages
- Several languages are read by voices trained on that language rather than an English voice reading foreign words — the difference is audible immediately.
- Credits that never expire
- Premium and ultra voices are billed from one-time credit packs. No subscription and no monthly reset.
Status: engines live, API rolling out
Being straight with you: the speech engines are in production and serving the web app today, but programmatic API access is not open yet. This page exists so you can evaluate the voices now and get notified the moment keys are available.
Nothing on this page describes an endpoint you cannot call yet — when the API ships, the documentation will replace this section.
What it will look like
The design goal is boring in the best way: a single synthesis endpoint that takes text, a voice, and a format, and returns audio. Engine selection happens through the voice you choose, so switching from a cheap open-weight model to a premium one is a one-field change rather than a rewrite.
- Credit-metered, same balance as the web app — no separate billing to reconcile
- Free-tier engines stay free through the API as well, within daily limits
- MP3 and WAV output
- Keys managed from your account settings, revocable at any time
Evaluate the engines first
The most useful thing you can do before an API launches is confirm the output is actually good enough for your product. Use the generator above with your real copy — not a marketing sample — and compare the free tier against the premium engines. If the free engine already clears your bar, that is the cheapest integration you will find; if it does not, you will know exactly which tier you need.
Questions
Frequently asked
Keep going