Pre-Upload Technical & Safe-Zone Verification
Catch >2MB PNG files and covered bottom-right text before opening YouTube Studio.
YouTube Thumbnail Size Checker
Audit your custom YouTube thumbnail against every official YouTube Studio technical requirement before you upload. Instantly verify pixel resolution (1280×720 or 1920×1080), 16:9 aspect ratio, file format, and the strict 2 MB file size ceiling—while previewing your thumbnail at real Desktop Search, Mobile Home, and Sidebar sizes complete with the bottom-right duration timestamp overlay.
Drop YouTube thumbnail here to check specs
Supports JPG, PNG, or WebP. Validates 1280x720, 16:9 ratio, and 2MB limit.
How to Use the YouTube Thumbnail Size Checker
- 1
Upload your custom YouTube thumbnail image (JPG, PNG, WebP, or GIF).
- 2
Inspect the instant 4-point technical audit: Resolution, 16:9 Aspect Ratio, < 2 MB File Size, and Format.
- 3
Examine the live Desktop Search, Mobile Feed, and Compact Sidebar previews with the dark duration badge (`12:45`) in the bottom-right corner.
- 4
Verify that no faces, arrows, or key text words are obscured by the timestamp badge.
- 5
If your file exceeds 2 MB or has the wrong dimensions, download an auto-optimized 1280×720 <2MB version in one click.
Practical Use Cases
Testing Small-Screen Mobile Legibility
Preview how a thumbnail designed on a 27-inch monitor actually looks when shrunk down to a 160px-wide mobile sidebar card.
Standardizing Client Deliverables to 1280×720
Verify that exported thumbnails meet exact 16:9 specs without black letterbox bars.
YouTube Thumbnail Size Checker Features
Timestamp Overlay Simulation
Shows the exact position of YouTube's '12:45' duration badge in the bottom-right corner to prevent covered text.
Strict 2 MB Limit Audit
Immediately flags thumbnails larger than YouTube's hard 2 MB limit so you never experience upload failures.
Mobile & Desktop Feed Preview
Simulates how your thumbnail renders across compact smartphone screens and desktop recommendation sidebars.
100% Client-Side Processing
Your photos, videos, and text are processed directly in your browser canvas. No files or media are ever uploaded to external servers.
Exact Platform Dimensions
Calibrated to current Instagram, YouTube, and LinkedIn guidelines to prevent unexpected cropping, blurriness, or interface overlap.
Zero Sign-up or Watermarks
Fast, completely free utilities with no subscriptions, account registrations, or watermarks added to your creative assets.
Technical Specifications & Best Practices
- ✓YouTube Studio requires a 16:9 aspect ratio (1280×720 px recommended, 640 px minimum width) and strictly rejects files over 2.0 MB (2,097,152 bytes).
- ✓The bottom-right corner (roughly the bottom 18% height and right 22% width) is covered by YouTube's video duration badge (`14:20`) and 'Watch Later' hover icons.
- ✓Supported formats are JPG, PNG, GIF (non-animated), and WebP.
- ✓All file inspection and resizing run 100% locally in your browser.