YouTube Thumbnail Previewer

Don't let YouTube's UI hide your best content. specialized tool to preview how your thumbnail looks behind timestamps, progress bars, and buttons.

Upload Your Thumbnail

Drag & drop or click to browse (JPG, PNG, WebP)

Your thumbnail is the first thing viewers see — but YouTube's own UI can partially hide it. This tool lets you simulate exactly how your thumbnail appears across all devices before publishing, so your title text, faces, and key visuals are never covered by a timestamp or progress bar.

Key Features

  • 📱 Multi-Device Preview — Simulate mobile, desktop, and TV overlays, each with different badge sizes and positions.
  • ⏱️ Realistic Timestamp — Toggle a customizable timestamp that mirrors YouTube's actual font and corner position per device.
  • 📊 Progress Bar — See how a partially-watched card looks with the red progress bar enabled.
  • 🔒 100% Private — Your image never leaves your browser. No upload, no server, no tracking.
  • ⚡ Instant Feedback — Drag & drop and see results immediately. No signup required.

How to Use

  1. Upload — Drag & drop a JPG, PNG, or WebP onto the upload area, or click to browse.
  2. Pick a Device — Switch between Mobile, Desktop, and TV using the Device View selector.
  3. Toggle Overlays — Enable the timestamp and/or the watch progress bar to simulate real YouTube UI.
  4. Set Duration — Type a custom video duration (e.g. 10:34) to match your video length.
  5. Check for Issues — Look for any text, faces, or graphics hidden behind the overlays.
  6. Iterate — Upload a revised thumbnail and repeat until everything important is clearly visible.

Tips for a Better Thumbnail

  • Keep key text and faces in the upper-left or center — the bottom-right corner is always covered by the timestamp.
  • Use bold, high-contrast visuals on mobile — the thumbnail is smaller and fine detail gets lost.
  • Leave breathing room near edges — platform overlays vary slightly between devices.
  • Test on TV view if your channel targets living-room viewers — overlay positions differ there.