What size is a YouTube thumbnail?

1280×720 pixels (16:9). This tool exports a ready-to-upload PNG at that size.

Does the AI generate the text?

No. The AI generates the background image only. The tool overlays real text so it stays crisp.

How do I avoid unreadable text?

Keep headlines short (3–6 words), use high contrast, and choose a bold text style preset.

Why did the background image include letters anyway?

Some models still “hallucinate” text. Regenerate with a simpler prompt and keep “no text / no letters” in mind.

Is there a watermark or signup?

No signup. Exports are clean PNG files with no watermarks.

Do I need an account to use this tool?

No. You can use GPTAI.host tools without signing up or logging in.

How do I get better-looking images/designs?

Specify the subject, style (e.g. minimal, cinematic), lighting, composition, and what to avoid. If text looks messy, keep designs text-light and add text later in an editor.

Is it safe to paste sensitive content?

Avoid submitting passwords, private keys, or confidential personal/business data. Your input must be processed to generate an output and may pass through third-party AI services.

Can I use the output commercially?

Usually yes, but it depends on your use case and the underlying AI/provider terms. If you need legal certainty (logos, trademarks, medical/legal), review the output carefully and consult a professional.

Generador gratuito de thumbnails para YouTube con IA

Crea thumbnails llamativos para YouTube que aumentan los clics

configuración de thumbnail

Tema del video

Categoría

Estilo de la miniatura

Estilo del texto

Esquema de colores

Elementos

Instrucciones personalizadas para el prompt

Tip: The tool adds crisp overlay text at export time—avoid asking the model to draw words or letters.

Miniaturas de YouTube generadas

Área de previsualización de la imagen

Tus miniaturas de YouTube aparecerán aquí

Configura las opciones a la izquierda y haz clic en "Generar" para crear tu miniatura

Cómo usar el generador de miniaturas de YouTube con IA

Introduce el título

Ingresa el título del video o el mensaje principal para la miniatura

Selecciona el estilo

Elige el estilo de la miniatura: llamativo y atractivo, minimalista o profesional

Elige los elementos

Pick elements (arrows, icons, face reaction) and choose a text style preset for the overlay

Generar y descargar

Crea una miniatura con alto CTR y descárgala para obtener el máximo de vistas del video

Ideas de diseño para miniaturas de YouTube

I Tried This for 7 Days

entretenimiento

llamativo y en negrita · alto contraste · reacción facial

Aprende Python en 10 Minutos

educación

limpio y profesional · alto contraste · gráficos/íconos

iPhone Review: Worth It?

Tecnología/Juegos

limpio y profesional · vibrante y llamativo · gráficos/íconos

30-Day Fitness Challenge

fitness

colorido y brillante · vibrante y llamativo · flechas/emojis

Easy Dinner in 15 Minutes

cocina

colorido y brillante · claro y alegre · limpio y minimalista

Make Money Online (Beginner)

negocios

llamativo y en negrita · alto contraste · flechas/emojis

Deliverables (ready-to-use files)

Finished PNG export

One-click download of a ready-to-upload 1280×720 PNG (16:9).

Real text overlay

Text is rendered by the tool (not AI-drawn), so it stays crisp.

Text-safe composition

Background prompt encourages negative space for better readability.

Export notes: 1280×720 (1.8:1), PNG.

YouTube thumbnail FAQs

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Match your YouTube branding on Reels.

Example input & output

Example input

Topic: 10 AI tools to speed up content creation
Style: high-contrast, bold typography area
Mood: energetic, modern

Example output

A thumbnail-style visual layout optimized for attention and readability.