Audit video thumbnails against YouTube guidelines: validates 1280x720 minimum width, 16:9 aspect ratio, and the strict 2 MB maximum upload limit.
Drag and drop your file here, paste from clipboard (Ctrl+V), or click browse.
Supports JPG, PNG, WebP, SVG, AVIF, HEIC, GIF, BMP, TIFF, ICO.
Follow 3 easy steps to process your image online.
Drop your artwork, logo, or photo into the workspace or click browse from your device.
Choose your social media platform preset (Instagram, YouTube, Facebook, TikTok, LinkedIn).
Position and scale your graphic within verified mobile and desktop display boundaries.
Download high-definition, perfectly sized graphics ready to publish without blur or cropping.
Your photos are processed directly inside your web browser. Nothing is ever uploaded to any cloud server or database, keeping your images strictly confidential.
Powered by modern HTML5 Canvas, WebGL, and WebAssembly for instantaneous transformations without queueing or server rendering delays.
Works smoothly across all modern web browsers on iPhone Safari, Android Chrome, Mac, Windows, and Linux computers.
Click any question below for detailed information about YouTube Thumbnail Checker
YouTube Thumbnail Checker is a free, web-based utility designed to check 1280x720 resolution, 16:9 ratio & < 2mb limit. Powered by modern browser technologies including HTML5 Canvas and WebAssembly, it processes your files directly on your local device without sending images to any external server. This guarantees instant results, maximum data privacy, and lossless output quality.
Yes, completely. Unlike traditional cloud converters, YouTube Thumbnail Checker does not upload, store, or log your pictures on remote servers. All image rendering and processing happens entirely inside your browser sandbox. Once you close or reload the page, your images are cleared from browser memory with zero residual footprint.
Yes. All aspect ratio and resolution presets are verified against current platform standards for profiles, feed posts, stories, reels, thumbnails, and channel headers. Your exported images will fit seamlessly without unwanted automatic cropping.
YouTube Thumbnail Checker supports uploads up to 50MB per file and accepts JPG, PNG, WebP, SVG, AVIF, HEIC, GIF, BMP, TIFF, and ICO. Processing is optimized for lightning-fast speeds on both mobile devices and desktop computers.