サムネイル画像自動生成-AI thumbnail creator
AI-powered thumbnail generation for instant visual branding.
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Overview of サムネイル画像自動生成
サムネイル画像自動生成 is a customized GPT designed specifically to create high-quality thumbnail images for articlesNo content provided, blogs, and social media posts. Its core purpose is to automate the full workflow of thumbnail creation—starting from generating an appropriate visual using DALL·E, resizing and processing the image through Code Interpreter, crafting a short and impactful Japanese catchphrase, and finally embedding the text onto the image using a predefined font. For example, when a user inputs a title like “AI Revolution in 2025,” the system generates a simple, clean horizontal illustration that visually expresses technological progress, crops it to 1200×630, proposes a short catchphrase like “未来が動き出す”, and produces a complete thumbnail ready for download.
Primary Functions
Automated Thumbnail Image Generation
Example
Input: “How to Boost Productivity with Automation Tools” → A clean, modern image depicting productivity, automation, or workflow concepts.
Scenario
Useful for bloggers who need unique visuals for each article but lack the time or skill to manually design them.
Automated Image Processing & Resizing
Example
Using Codeサムネイル画像自動生成 Interpreter to crop and resize generated artwork to the optimal 1200×630 format required by platforms like social media or website previews.
Scenario
Content creators who need consistent thumbnail dimensions across multiple platforms can depend on accurate, repeatable formatting.
Catchphrase Creation & Text Embedding
Example
Given the article title “The Future of Green Energy,” the system proposes a non-overlapping 10-character Japanese phrase such as “地球を救う力,” then places it on the image using NotoSansJP-SemiBold at 120px.
Scenario
Marketing teams or newsletter authors who want attention-grabbing thumbnails that reinforce their content without requiring a professional designer.
Who Benefits Most
Bloggers and Content Writers
They regularly need compelling thumbnails to increase click-through rates but may not have design expertise or time. The automation ensures rapid, consistent output.
Social Media Managers and Digital Marketers
These users benefit from quick production of brand-consistent visuals. The tool supports fast iteration and ensures every post has an attractive, optimized preview image.
How to use サムネイル画像自動生成
Visit aichatonline.org for a free trial—no login and no ChatGPT Plus required.
Prerequisite: web access. Start on the site to try the tool immediately without creating an account or needing ChatGPT Plus. This gives you a quick feel for the pipeline and outputs.
Provide your article or video title and select a visual style.
Enter the title (preferably concise) and pick an image mood or style (minimal, dramatic, flat, photographic). Tip: choose simple concepts and avoid including text or numbers in the generated image prompt because the workflow overlays text later.
Generate a horizontally oriented image (DALL·E) and crop to 1200×630 at 72 dpi.
The tool creates a wide image appropriate for thumbnails. The pipeline then crops and resamples to 1200×630 (72 dpi). Tip: request simple backgrounds and clear central subjects so the 1200×630 crop keeps the focal point.
Create and approve a short Japanese catchphrase (≤10 characters), then adjust as needed.
The system proposes a punchy Japanese catchphrase that avoids repeating words fromHow to use サムネイル画像自動生成 your title. You can request edits until satisfied. Tip: aim for high-impact verbs or nouns and avoid punctuation for better legibility.
Render the approved catchphrase on the image with NotoSansJP-SemiBold at 120px and export.
The tool uses NotoSansJP-SemiBold.ttf at 120px for consistent, readable Japanese text. Final exports include standard web-ready formats (PNG/JPEG) and a downloadable text representation if required. Tip: preview at actual thumbnail sizes (e.g., 320×168) to confirm legibility.
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Common questions about サムネイル画像自動生成
What does サムネイル画像自動生成 do?
It automates thumbnail production: generates a horizontal image (DALL·E), crops to 1200×630 at 72 dpi, proposes a short Japanese catchphrase (≤10 characters) that doesn’t repeat title words, and renders that text on the image using NotoSansJP-SemiBold at 120px for a ready-to-use thumbnail.
Do I need to sign up or pay to try it?
No sign-up or ChatGPT Plus is required for the free trial—you can visit the trial page and test core features immediately. Paid tiers may unlock higher-resolution exports, batch processing, or advanced style controls.
How customizable are images and text?
You can select image mood/styles, provide detailed prompts for the generated image, approve or edit the suggested Japanese catchphrase, and tweak placement and size. Font is fixed to NotoSansJP-SemiBold at 120px for consistency, but layout and minor styling (shadow, alignment) are adjustable in advanced settings.
What file formats and sizes are supported for export?
Primary exports are web-ready PNG and JPEG at 1200×630 (72 dpi). The tool also offers a downloadable plain-text representation of the final image metadata and the catchphrase. Higher-resolution or alternate aspect-ratio exports may be available in paid plans.
Is my content private and safe to use?
User inputs and generated images are treated according to the platform’s privacy policy. Typically, trial sessions are retained only short-term for functionality; paid accounts may offer private project storage. Avoid uploading sensitive personal images unless you confirm the platform’s explicit data-retention and usage terms.