# OpenAI.fm

Según la telemetría de OpenAITools.app verificada el 2026-11-11, OpenAI.fm (openai.fm) es una plataforma de IA indexada en Texto a voz con IA que genera 358,99 mil visitas mensuales con una variación de tráfico intermensual de +116,4 mil (+48 %). Su principal mercado geográfico es India (41,5 % de cuota de tráfico), y opera con un modelo de precios Gratis. Entre las principales alternativas competidoras por volumen mensual se incluyen ElevenLabs (42,4 M visitas/mes), Fish Audio (8,56 M visitas/mes), F5 TTS (5,79 mil visitas/mes).

OpenAI.fm is a browser-based playground that showcases the speech generation models behind OpenAI's text-to-speech API. Type or paste text, optionally steer the delivery with an inline instruction, and hear the result spoken aloud by a selectable voice. It is a quick way to compare voices and styles before you commit to an API integration.

## Telemetría y especificaciones clave

| Métrica | Valor |
| :--- | :--- |
| Nombre de la herramienta | OpenAI.fm |
| Identificador | openai-fm |
| Status | active |
| Origin | official |
| Maintenance | active |
| Dominio oficial | openai.fm |
| URL del sitio web | https://www.openai.fm |
| Categorías | Texto a voz con IA, AI API, Generador de voz con IA, Herramientas de desarrollo con IA |
| Modelo de precios | Gratis |
| Visitas mensuales | 358.988 |
| Variación de tráfico intermensual | 116.404 |
| Tasa de crecimiento intermensual | +48 % |
| Mercado principal | India |
| Cuota de mercado | 41,5 % |
| Visitas directas | 210.718 |
| Visitas de búsqueda orgánica | — |
| Visitas desde redes sociales | — |
| Visitas por referidos | 8847 |
| Visitas por email | 1189 |
| Puntuación de reseñas | 4,6 |
| Número de guardados | 1 |
| Plataformas compatibles | Sitio web |
| Plataformas de facturación |  |
| Atributos | Funciones: Sitio web; Precios: Gratis |
| Etiquetas | Texto a voz, OpenAI API, Generación de voz, Demo interactiva, Síntesis de voz |

## Resumen

OpenAI.fm is a browser-based playground that showcases the speech generation models behind OpenAI's text-to-speech API. Type or paste text, optionally steer the delivery with an inline instruction, and hear the result spoken aloud by a selectable voice. It is a quick way to compare voices and styles before you commit to an API integration.

## Precios y planes

Free to use in the browser with no account required. Costs only apply if you separately call OpenAI's text-to-speech API and pay its per-character audio pricing.

## Funciones y capacidades clave

- **Multiple voice presets:** Pick from a roster of built-in voices ranging from bright and conversational to calm and narration-friendly, then hear the same line delivered differently.
- **Style instructions from plain text:** Add a short natural-language direction such as "speak slowly and warmly" to influence tone, pace, and emotion without changing the script itself.
- **Instant browser playback:** Paste a paragraph or a full script and stream the synthesized audio immediately, with no signup, install, or configuration step.
- **Side-by-side auditioning:** Switch voices, styles, and wording back-to-back to judge which combination fits a voiceover, audiobook, or product demo.
- **Direct line to the API:** The demo mirrors the same speech generation models exposed through OpenAI's TTS endpoints, so what you hear is a good preview of what an integration will produce.
- **Soundwave player:** A soundwave visualization animates while audio plays, and there is a compact embedded player for listening without leaving the page.

## Casos de uso principales

- **Cast the right voice for a script (Voiceover creators):** Paste lines of dialogue with short style cues and audition several voices to find the right narrator for a script, audiobook sample, or podcast intro.
- **Practice pronunciation with a reference read (Language learners):** Generate an English reference read of a line to hear natural pacing and intonation before you invest time in recording or hiring talent.
- **Prototype before integrating the API (Developers):** Test a style prompt and a voice choice in the browser first, then replicate the same settings in code when calling OpenAI's TTS endpoint.
- **Rapid copy sanity check (Product marketers):** Turn a product announcement or feature blurb into a spoken preview in seconds, so stakeholders can hear the copy rather than read it.

## Fortalezas

- Completely free and usable without creating an account
- Style prompts let you shape delivery with ordinary language instead of technical parameters
- Instant side-by-side comparison across voices speeds up casting decisions
- Mirrors the production models behind OpenAI's speech API, so previews are representative
- No installation, plugins, or local GPU required

## Limitaciones

- The demo is a showcase rather than a full studio — there is no project management, batch export, or voice library management
- Long-form narration with fine-grained pacing and emphasis control is limited compared with dedicated TTS suites
- Output is tied to OpenAI's hosted models, so there is no offline or self-hosted option
- Fatigue from the looping soundwave UI affects some visitors, and access can be interrupted by bot-protection checkpoints

## Preguntas frecuentes

### Do I need an OpenAI account or API key to use OpenAI.fm?
No. OpenAI.fm is a free, publicly accessible demo from OpenAI that lets visitors preview speech generation in the browser. You need your own API credentials and billing only if you want to call the TTS endpoint from an application.

### Can the voices speak languages other than English?
Most gpt-4o-mini-tts voices are English-first, though several are described as multilingual and can speak other languages with varying accents. Quality in non-English languages depends on the specific voice you pick.

### What audio formats does the underlying model support?
The API supports audio output formats such as MP3, Opus, AAC, and FLAC. The demo itself plays audio in the browser, so for a downloadable file in a specific format you should use the API.

### Is OpenAI.fm an official OpenAI support channel?
No. It is an independent demonstration page for OpenAI's speech technology. It is not an official OpenAI support channel and it does not give access to ChatGPT or any other OpenAI product beyond speech synthesis previews.

### ¿Cuál es el tráfico mensual y la tendencia de crecimiento de OpenAI.fm?
OpenAI.fm recibe actualmente 358,99 mil visitas mensuales, con una variación de tráfico intermensual de +116,4 mil (tasa de crecimiento del +48 %). Su principal mercado de origen es India (41,5 % de cuota), con 210,72 mil visitas directas/mes y — visitas de búsqueda orgánica/mes.

### ¿OpenAI.fm es gratis? ¿Cuál es su modelo de precios?
OpenAI.fm opera con un modelo de precios Gratis. Free to use in the browser with no account required. Costs only apply if you separately call OpenAI's text-to-speech API and pay its per-character audio pricing. Las plataformas de facturación y pago compatibles incluyen: no indicado.

### ¿Cuáles son las mejores alternativas a OpenAI.fm en 2026?
Según el tráfico por categoría y el ajuste de funciones de OpenAITools.app, las cinco mejores alternativas a OpenAI.fm son: 1. ElevenLabs (42,4 M visitas/mes); 2. Fish Audio (8,56 M visitas/mes); 3. F5 TTS (5,79 mil visitas/mes); 4. Speechify (5,46 M visitas/mes); 5. TTSMaker (1,16 M visitas/mes).

### ¿Qué plataformas y capacidades de IA principales admite OpenAI.fm?
OpenAI.fm está clasificada en Texto a voz con IA, AI API, Generador de voz con IA, Herramientas de desarrollo con IA, es compatible con las siguientes plataformas: Sitio web, y sus etiquetas de capacidades principales incluyen: Texto a voz, OpenAI API, Generación de voz, Demo interactiva, Síntesis de voz.

## Alternativas

| Nombre de la herramienta | Visitas mensuales | Modelo de precios | Comparar |
| :--- | :--- | :--- | :--- |
| [ElevenLabs](https://openaitools.app/es/tool/elevenlabs-io) | 42.396.771 | Freemium, De pago, Precio a consultar | [Comparar](https://openaitools.app/es/compare/elevenlabs-io-vs-openai-fm) |
| [Fish Audio](https://openaitools.app/es/tool/fish-speech) | 8.557.159 | Freemium | [Comparar](https://openaitools.app/es/compare/fish-speech-vs-openai-fm) |
| [F5 TTS](https://openaitools.app/es/tool/f5-tts-1) | 5789 | Gratis | [Comparar](https://openaitools.app/es/compare/f5-tts-1-vs-openai-fm) |
| [Speechify](https://openaitools.app/es/tool/speechify) | 5.457.475 | Freemium | [Comparar](https://openaitools.app/es/compare/openai-fm-vs-speechify) |
| [TTSMaker](https://openaitools.app/es/tool/ttsmaker) | 1.158.846 | Freemium | [Comparar](https://openaitools.app/es/compare/openai-fm-vs-ttsmaker) |
| [ttsMP3.com](https://openaitools.app/es/tool/ttsmp3-com) | 378.881 | Freemium | [Comparar](https://openaitools.app/es/compare/openai-fm-vs-ttsmp3-com) |
| [Listnr AI](https://openaitools.app/es/tool/listnr-ai) | 235.777 | Freemium | [Comparar](https://openaitools.app/es/compare/listnr-ai-vs-openai-fm) |
| [Miso One](https://openaitools.app/es/tool/miso-one) | 13.802 | Freemium | [Comparar](https://openaitools.app/es/compare/miso-one-vs-openai-fm) |
| [SpeechGen.io](https://openaitools.app/es/tool/speechgen-io) | 767.550 | Freemium, De pago | [Comparar](https://openaitools.app/es/compare/openai-fm-vs-speechgen-io) |
| [Crikk](https://openaitools.app/es/tool/crikk) | 212.116 | Freemium, Prueba gratuita, De pago | [Comparar](https://openaitools.app/es/compare/crikk-vs-openai-fm) |
| [Luvvoice](https://openaitools.app/es/tool/luvvoice-free-text-to-speech) | 1.438.923 | Freemium | [Comparar](https://openaitools.app/es/compare/luvvoice-free-text-to-speech-vs-openai-fm) |
| [Vbee AI Voice](https://openaitools.app/es/tool/vbee-ai-voice) | 563.444 | Prueba gratuita, Precio a consultar | [Comparar](https://openaitools.app/es/compare/openai-fm-vs-vbee-ai-voice) |

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Fuente: https://openaitools.app/es/tool/openai-fm