Thumbnail Text Legibility Checker
Verify if your thumbnail text is readable at mobile screen sizes and prevent elements from being covered by YouTube’s timestamp overlays.
Design Configuration
Simulated Feed Preview
*The 10:45 badge represents YouTube's standard video duration timestamp overlay.
Legibility Feedback
Word Count Optimization (2 Words)
Optimal legibility! Kept under 4 words so search users scan it instantly.
Timestamp Interference Check
Perfect placement! The bottom-right timestamp will not overlap with your words.
Contrast Optimization
Optimal design! Bright font contrasts well with dark backdrop themes.
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How to use Thumbnail Text Checker
Upload your designed YouTube thumbnail.
The tool will instantly show you how it looks on mobile, desktop, and TV.
Check if the text is readable and if YouTube's UI overlays block important elements.
Why use our Thumbnail Text Checker?
Real-World Previews
See exactly how your thumbnail will look next to competitor videos in the actual YouTube layout.
Time-Stamp Overlay Check
Ensures you haven't placed crucial text in the bottom right corner where the timestamp sits.
100% Secure & Private
All processing happens in your browser. Your files are never uploaded to our servers, guaranteeing absolute privacy and security.
Lightning Fast
Because everything runs locally on your device, processing is instant. No waiting in queues or dealing with slow uploads.
Frequently Asked Questions
What is the optimal size for a YouTube thumbnail?
The best size is 1280x720 pixels (16:9 aspect ratio) with a file size under 2MB.
Why is thumbnail text readability important?
Over 70% of YouTube viewership is on mobile. If your text is too small to read on a phone screen, you will lose clicks.
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