Lewis

Lewis is a male British English AI voice rated D+ on the OfflineTTS quality scale. Speech synthesis runs in your browser with no signup or per-character fees.

Best for: General purpose

Quality rating explained: D+ 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.

The Lewis voice uses Kokoro's browser phonemizer and local WebGPU or WebAssembly synthesis. After the initial model download, English generation works completely offline.

Preview transcript: the sample player above reads: “My neighbour asked whether I fancied a walk through the park before dinner. We took the longer path, talked about nothing urgent, and stopped to watch two dogs chase leaves. The fresh air made the whole evening feel less hurried.” Listen to that clip before generating your own text; it is the shortest way to judge pronunciation, pace, and whether the British English phonemization path fits your script.

Reviewing British English text with this preset: British English differs from the American presets in vowel quality and in non-rhotic word endings. Check place names, "schedule", "route", and any word where your audience expects one accent over the other before you export narration for a British audience.

Grade context: A D+ grade sits in the weakest third of the catalog. It is included for completeness and unusual character work, not for long narration.

What the browser downloads: English Kokoro ships two model files here: a 305 MB 4-bit build and a 326 MB full-precision build. The browser downloads one of them on first use and keeps it in cache; the phonemizer for English also runs locally.

Asset identity: this preset maps to the cached asset fingerprint b5204750, so it can be told apart from a same-named voice on another engine even when the label in the picker looks identical.

Other British English voices: Emma (female, grade B-), Alice (female, grade D), Isabella (female, grade C). Switching between them on the same sentence is the fastest way to hear whether one suits the script better.

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