Thumbnail size checker
Check instantly if your thumbnail meets YouTube rules
| Platform | Recommended size | Aspect ratio | file |
|---|---|---|---|
| YouTube thumbnail | 1280×720 | 16:9 | Under 2MB · JPG/PNG/GIF |
| YouTube channel banner | 2560×1440 | 16:9 | Under 6MB |
| Instagram post (portrait) | 1080×1350 | 4:5 | JPG/PNG |
| Shorts / Reels cover | 1080×1920 | 9:16 | JPG/PNG |
🔒 Everything is calculated in your browser. Nothing you enter is sent to our server.
Recommended
Edit videos faster with SSOKCUT
- ✓ Free to use
- ✓ Auto subtitles
- ✓ Shorts maker
- ✓ Auto-remove silence
- ✓ Easy editing
Coming soon See development news
S
SSOKCUTEdit videos faster with SSOKCUT
Coming soon
See development news
More Video tools
YouTube revenue calculatorEstimate ad revenue from your views
Bitrate calculatorRecommended bitrate for your resolution and frame rate
Video file size calculatorFile size from bitrate and length, or bitrate from a target size
Resolution & aspect ratio calculatorFind the aspect ratio, or fit a size to a ratio
SRT subtitle converterConvert SRT ↔ VTT/TXT and shift subtitle timing