Siwis

Siwis is a female French AI voice rated B- on the OfflineTTS quality scale. Speech synthesis runs in your browser with no signup or per-character fees.

Best for: French narration

Quality rating explained: B- is a catalog discovery label, not a measured MOS score, a public leaderboard position, or a guarantee for your script. Audition names, numbers, pacing, and chunk joins before publishing.

Non-English Kokoro voices use the lightweight OfflineTTS phonemization service for pronunciation tokens, followed by local WebGPU/WASM waveform generation on your device.

Preview transcript: the sample player above reads: “Ce matin, j’ai ouvert la fenêtre avant de faire du café. La rue était encore calme et un vélo de livraison est passé doucement sous les arbres. J’ai noté trois choses à faire aujourd’hui, puis j’ai décidé que la première pouvait attendre après le petit déjeuner.” Listen to that clip before generating your own text; it is the shortest way to judge pronunciation, pace, and whether the French phonemization path fits your script.

Reviewing French text with this preset: French reading depends on liaison, elision, and silent final consonants. Numbers, acronyms, and proper nouns are where a draft most often needs a manual rewrite, and a French listener should check any passage that will be published.

Grade context: A B- grade means the voice is understandable and characterful but noticeably less polished than the top bands. Test it on a full paragraph before committing.

What the browser downloads: For this French preset, Kokoro needs phoneme tokens that the browser phonemizer does not produce, so the text is sent to the OfflineTTS phonemization endpoint before the local model synthesizes audio. The audio itself is still generated on your device.

Asset identity: this preset maps to the cached asset fingerprint 8073bf2d, so it can be told apart from a same-named voice on another engine even when the label in the picker looks identical.

Other French voices: Louise (female, grade B+), Gabrielle (female, grade B), Huguette (female, grade B). Switching between them on the same sentence is the fastest way to hear whether one suits the script better.

Explore other French voices or browse the complete voice library for your project.