Alex

Alex is a male Spanish AI voice rated C 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: C 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: “El domingo por la tarde caminé por el barrio sin un destino concreto. Unos niños dibujaban con tiza en la acera y alguien practicaba guitarra en un balcón. Volví a casa cansada y contenta, con flores del mercado y la sensación de haber aprovechado el fin de semana.” Listen to that clip before generating your own text; it is the shortest way to judge pronunciation, pace, and whether the Spanish phonemization path fits your script.

Reviewing Spanish text with this preset: Spanish is syllable-timed, which makes even pacing matter more than in English. Regional vowel and consonant choices split Castilian from Latin American usage, and loanwords plus proper nouns are the usual places to correct after the first render.

Grade context: A C grade describes a preset that needs real review. Listen for metallic edges, breath noise, or uneven energy before using it in published audio.

What the browser downloads: For this Spanish 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 5eac53f7, so it can be told apart from a same-named voice on another engine even when the label in the picker looks identical.

Other Spanish voices: Dora (female, grade C), Santa (male, grade C). Switching between them on the same sentence is the fastest way to hear whether one suits the script better.

Same name, different engine: “Alex” also exists as a Brazilian Portuguese preset on Kokoro with a C catalog grade. Compare both on the same sentence before choosing, because the two assets were recorded, cloned, or trained separately and do not sound identical.

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