YouTube Thumbnail Preview
Preview thumbnails at all YouTube sizes, see a search result mockup, and generate custom thumbnails with text.
Enter a YouTube video ID or URL, or upload your own image.
PNG, JPG, WebP — 1280×720 recommended
About YouTube Thumbnail Preview
Need to preview thumbnails at all youtube sizes, see a search result mockup, and generate custom thumbnails with text quickly? YouTube Thumbnail Preview handles it right in your browser with no uploads, no accounts, and no watermarks. It supports common image formats like JPEG, PNG, and WebP, and delivers results instantly using client-side processing. Your files stay on your device at all times.
How to Use
Why Use YouTube Thumbnail Preview?
Frequently Asked Questions
YouTube recommends 1280×720 pixels (16:9 aspect ratio) with a minimum width of 640px. The file must be under 2MB in JPG, PNG, GIF, or WebP format. Thumbnails display at many sizes depending on context — from 94px in search results on mobile to full 1280px on TV apps — so designing for the largest size and checking how it looks small is best practice.
High click-through rate (CTR) thumbnails typically use: bright, contrasting colors that stand out in dark and light themes; large, readable text visible at 168×94px (search size); a human face with emotion (joy, shock, curiosity); visual contrast between subject and background; and an arrow or visual cue directing attention to text. Use this tool to check legibility at small sizes before publishing.
Yes — enter any video ID above to preview YouTube's auto-generated thumbnails (default, HQ, and max resolution). These are publicly available via img.youtube.com/vi/{id}/maxresdefault.jpg. However, creators who upload custom thumbnails (requiring a verified account) consistently see higher CTR. Auto-generated thumbnails are often blurry or capture an unflattering mid-action frame.