Luna

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

Voice character: British, Deep

Best for: Authoritative 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.

The Luna voice runs on Pocket TTS (100M parameter model) with on-device audio synthesis. After model assets download, speech is generated locally in your browser.

Preview transcript: the sample player above reads: “If the red of a second bow falls upon the green of the first, the result is to give a bow with an abnormally wide yellow band, since red and green light when mixed form yellow.” 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 B grade describes a usable preset that benefits from a short audition. Expect the occasional clipped word or uneven emphasis that a script edit can fix.

What the browser downloads: Pocket TTS bundles about 146 MB of assets and runs a 100M parameter model in the tab. The first generation downloads the bundle, later visits reuse the browser cache, and clearing site data removes it.

Asset identity: this preset maps to the cached asset fingerprint ky1dd0, 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.