Development — entry 043 of 100
IBM Text to Speech
IBM Watson Text to Speech converts text or SSML into spoken audio across a wide language set — English, Spanish, French, German, Portuguese, Japanese, Korean, Arabic, and Mandarin among others — with 'Enhanced' neural voices across most languages and 'Expressive' neural voices for US/Australian English. It returns audio via synchronous REST or a WebSocket stream in MP3, WAV, FLAC, Ogg/Opus, Ogg/Vorbis, or raw PCM/A-law/mu-law, billed under IBM Cloud IAM API keys with a free Lite tier (10,000 characters/month) before metered per-character pricing applies on paid plans.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsMP3, WAV, FLAC, OGG, JSONResponses can be requested as MP3 or WAV or FLAC or OGG or JSON.
GreatAPIs Score
Score81
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs14/20Documentation URL provided
Formats15/15Supports 5 response formats
Freshness20/20Verified within 6 months
Embed this badge
<a href="https://greatapis.com/api/ibm-text-to-speech/"><img src="https://greatapis.com/badge/ibm-text-to-speech.svg" alt="Scored 81 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.