Reference
Platform Limits
Limits and constraints for each platform
Each social media platform has specific limits and constraints.
File Size Limits
| Platform | Images | Videos |
|---|---|---|
| 8 MB | 100 MB | |
| 4 MB | 1 GB | |
| 5 MB | 200 MB | |
| X (Twitter) | 5 MB | 512 MB |
| TikTok | N/A | 287 MB |
| YouTube | N/A | 128 GB |
| 32 MB | N/A | |
| Bluesky | 5 MB | N/A |
| Threads | 8 MB | N/A |
Aspect Ratio Limits
| Platform | Min Aspect Ratio | Max Aspect Ratio |
|---|---|---|
| 0.8 | 1.91 | |
| 0.8 | 1.91 | |
| 0.8 | 1.91 | |
| X (Twitter) | 0.5 | 2.0 |
| TikTok | 0.5 | 2.0 |
| YouTube | 0.5 | 2.0 |
| 0.5 | 2.0 | |
| Bluesky | 0.5 | 2.0 |
| Threads | 0.8 | 1.91 |
Character Limits
| Platform | Caption Limit |
|---|---|
| 2,200 | |
| 63,206 | |
| 3,000 | |
| X (Twitter) | 280 |
| TikTok | 2,200 |
| YouTube | 5,000 |
| 500 | |
| Bluesky | 300 |
| Threads | 500 |
Video Duration Limits
| Platform | Min Duration | Max Duration |
|---|---|---|
| 3s | 60s (Reels) | |
| 1s | 240s | |
| 3s | 10m | |
| X (Twitter) | 0.5s | 140s |
| TikTok | 3s | 10m |
| YouTube | 1s | Unlimited |
| N/A | N/A | |
| Bluesky | N/A | N/A |
| Threads | N/A | N/A |
Rate Limits
API rate limits vary by platform. See API Rate Limits for details.