YouTrans
Thumbnail Localization Tool
Translate and generate YouTube thumbnails in up to 30 languages at once.
Fonts and translations that boost views help you grow globally.
Overview
The YouTrans thumbnail localization tool automatically reads the text in your YouTube thumbnail (OCR), then translates it into up to 30 languages, adjusts the layout and generates the images, all in one place. It goes beyond literal translation: the AI writes catchy copy that resonates with viewers in each language.
The whole job takes four steps: choose languages → upload an image → review and adjust → generate everything at once.
Thumbnails that work well (and don't) for localization
Features that boost views
-
🌍Translate into 30 languages at once
Covers the top 30 languages on YouTube. Presets let you select 5, 10, 20 or 30 languages in one click. -
🔤CTR-optimized fonts by language (about 10 each)
Fonts that tend to get more views, curated for each language. Apply them all at once with 6 font presets. -
🎯CTR-optimized translation (AI engine)
Beyond literal translation, the AI writes catchy copy suited to each language's culture and audience. When a translation needs two or more lines, the AI also decides the best line breaks.
Other handy features
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💾Save default settings
Save your language presets, font settings and layout so you can start right away next time. Keep your channel's branding consistent. -
📂Save and load projects
Export translations, areas and language selections to a JSON file. Restore them later or continue on another device. -
🔠ALL CAPS
Convert Latin-script text to all capitals in one click for more visibility and impact. -
📚YouTube culture tips for each language
Check YouTube trends and viewer culture for each language on the spot. Combined with CTR-optimized translation, it helps you make thumbnails that land locally. -
📦Apply to all
Apply the text position, font size, styling and letter spacing you set for one language to all 30 at once. -
☑Back-translation check
Translate the localized text back into Japanese to check its meaning. -
👍YouTube thumbnail compliance check
Check whether your thumbnail meets YouTube's thumbnail requirements.
Language and font settings
First, set the target languages and fonts. These settings can be saved as defaults and are loaded automatically next time.
Language presets
The "⭐ Top 5", "🚀 Wide 10", "🌍 Full 20" and "🌐 Max 30" buttons select the languages with the most YouTube viewers in one click. You can also add or remove languages individually.
Font presets
We provide 6 font presets based on fonts used by world-famous YouTubers. Selecting one switches the fonts for all 30 languages at once.
| Preset | Style | Best for |
|---|---|---|
| Thumbnail classic | The most-used YouTube font in each language | General use |
| IMPACT style | Extra bold, highly visible | Shocking or news content |
| Modern & clean | Refined and easy to read | Business and education |
| Elegant & premium | Classy and trustworthy | Cooking, travel and beauty |
| Friendly & approachable | Warm and rounded | Food, parenting and vlogs |
| Tech & futuristic | Sharp and geometric | AI, gaming and science |
Uploading an image and selecting areas
Upload your thumbnail and drag to select the areas containing the text to translate.
to Learn English
Steps
- Upload your thumbnail (click the upload area in the left panel)
- Drag to select translation areas (dragging on the image draws a rectangle; up to 5)
- Check and correct the OCR result (the detected text appears in the right panel; edit it if needed)
- Click "Translate"
Switching modes (you can switch anytime with the toggle at the top)
| Mode | Description |
|---|---|
| "Localize an image with text" mode | Choose this if your thumbnail already has text. You can select up to 5 areas to read text from. |
| "Create from an image without text" mode | Choose this if your thumbnail has no text. You can select up to 5 areas to place text in. |
Choosing a translation engine
You can choose a translation engine for each area. Each engine has a different translation style and features.
| Engine | Features | Plan |
|---|---|---|
| 🆓 Default engine Standard translation |
Standard translation. Fast and stable, and set as the default engine. | Free |
| ☁️ Backup engine | An alternative engine in case the default engine has problems. | PRO |
| ✨ Click-boosting AI translation | Writes catchy copy that resonates with viewers in each language. The one to use if you want more views. | PRO |
| 📐 Smart line breaks Faithful translation |
Translates faithfully to the original text, and the AI decides the best line breaks when it needs two or more lines. | PRO |
| 🚀 Smart line breaks Click-boosting translation |
Combines CTR-optimized translation with smart line breaks, maximizing both readability and appeal. | PRO |
Reviewing translations and adjusting styles
Once translation is done, you can check and edit the text and style for each language. Applying one language's settings to all the others at once is especially handy.
English Method
English Method
Settings you can apply to all
| Button | Settings applied |
|---|---|
| 📦 Apply box position to all languages | X/Y position and size of the text box |
| 🔤 Apply font size and alignment to all languages | Font size, text alignment and wrapping |
| ↔ Apply letter and line spacing to all languages | Letter spacing and line spacing |
| ✨ Apply styling to all languages | Outline, shadow, glow and text color |
🖼 Preview
Click "Preview" at the top of Step 2 to see the image actually generated on the server. Switch between "Edit" and "Preview" mode with the buttons.
| Mode | What you see |
|---|---|
| Edit mode (default) | Template image with area frames overlaid. You can drag them around. |
| Preview mode | Shows the thumbnail actually generated on the server, the closest thing to the final output. |
🔠 ALL CAPS
Displays all text in capital letters. The button appears in the edit panel only for supported languages. Useful when you want more visibility and impact.
| Setting | Example | Effect |
|---|---|---|
| OFF (default) | The Ultimate Method | Normal |
| ON | THE ULTIMATE METHOD | More visibility and impact |
📚 "Tips" button — YouTube culture in each language
Click the "Tips" button in each language's edit panel to see information about that language's YouTube audience, trends and preferred styles. Combined with CTR-optimized translation, it helps you make thumbnails that really land with local viewers.
↩ Smart line breaks (after translation)
Even after translation, for example if you edited the text by hand, the "Smart line breaks" button recalculates the line breaks. It works separately from the engine's automatic line breaks and can be applied anytime after editing.
Enter the target number of lines (2–5), then click "Apply". The AI inserts line breaks at the best positions to fit that number of lines.
| When | How |
|---|---|
| Automatically during translation | Translate with a "Smart line breaks" engine |
| Manually after translation | Enter the number of lines (2–5) → click "Apply" |
💾 Save and load projects
You can save and restore your Step 2 progress as a JSON file. Handy when you want to pause and pick up later, or reuse the same translations.
| Button | Action |
|---|---|
| 💾 Save | Downloads the translations, areas and language selections as a JSON file, with a timestamp in the file name. |
| 📂 Load | Select a saved JSON file to restore the translations. |
Bulk generation and download
When all languages are set, generate all the thumbnails at once and download them as a ZIP file.
About the output files
The generated thumbnails are downloaded together in a ZIP file. Each file name includes the language (e.g. thumbnail_english.jpg).
Font presets in detail
The 6 font presets set the best fonts for viewers in each language, all at once.
YouTube spec check
Automatically checks whether your uploaded image meets YouTube's recommended specs.
| Item | Recommended | Result |
|---|---|---|
| File format | JPG / PNG / WebP / GIF / BMP | ✓ OK / ✗ NG |
| Recommended resolution | 1280 × 720 px (minimum 640 × 360 px) | ✓ OK / △ Small / ✗ NG |
| Maximum file size | 2 MB or less | ✓ OK / ✗ Too large |
| Aspect ratio | 16:9 | For reference |
FAQ
For other questions, see the FAQ page.