Quick Reference
| Platform | Type | Ratio | Recommended Size |
|---|---|---|---|
| Feed | 1:1 / 4:5 | 1080×1080 / 1080×1350 | |
| Stories / Reels | 9:16 | 1080×1920 | |
| TikTok | Video | 9:16 | 1080×1920 |
| YouTube | Standard | 16:9 | 1920×1080 (4K: 3840×2160) |
| X (Twitter) | Video / Image | 16:9 / 1:1 | 1280×720 / 1200×675 |
| Feed | 1:1 / 16:9 | 1080×1080 / 1920×1080 |
Instagram supports multiple formats. Feed posts look best in square (1:1) or portrait (4:5); Stories and Reels are full-screen vertical (9:16). Sticking to these sizes avoids cropping and keeps quality high.
Feed (image & video)
1:1 1080×1080 or 4:5 1080×1350. Portrait 4:5 gets more real estate in the feed and works well for faces and how-tos.
Stories / Reels
9:16 1080×1920. Full-screen vertical; keep important content in the safe zone so it isn’t covered by UI.
TikTok
TikTok is built for vertical. Use 9:16 at 1080×1920. Export at a high bitrate (e.g. 10+ Mbps); the app re-encodes on upload, so a strong source keeps quality better.
- Video: 9:16, 1080×1920
- Cover: auto from first frame, or upload a 9:16 still
- For widescreen content, add letterbox bars to make 9:16 and keep a cinematic look
YouTube
YouTube’s standard is 16:9. Use 1920×1080 for 1080p or 3840×2160 for 4K. Shorts use vertical 9:16 at 1080×1920, same as Reels and TikTok.
Recommended export
Long-form: 1920×1080 or 3840×2160, H.264, 8–12 Mbps (1080p) or 35–45 Mbps (4K). Shorts: 1080×1920, same specs as other short-form platforms.
X (Twitter)
X supports flexible ratios; 16:9 and 1:1 are most common. Use 1280×720 or 1200×675 so files aren’t too large and avoid heavy compression.
- Video: 16:9 or 1:1, 1920×1080 max is usually enough
- Image: 1200×675 (16:9) or 1080×1080 (1:1)
LinkedIn feed favors 1:1 and 16:9. Square 1080×1080 works everywhere; 1920×1080 suits talks and tutorials. Vertical takes less space in feed, so it’s used less.
Recommendation: 1080×1080 or 1920×1080 for images and video. For vertical clips, crop to 1:1 or add letterbox to output 16:9.
通用建议
- For cross-posting, master at the largest size (e.g. 1920×1080), then crop or letterbox per platform.
- One 9:16 vertical export works for Instagram Reels, TikTok, and YouTube Shorts.
- For widescreen content on vertical platforms, add letterbox bars to reach 9:16 instead of stretching or cropping.
- Keep important text and subjects in the center safe zone so they’re not covered by platform UI.
Need Letterbox Mattes for These Sizes?
FrameGen supports 16:9, 9:16, 21:9, 1:1, and more. Generate transparent letterbox mattes for any platform export size.
Open FrameGen