Free tool · Updated April 2026
Social media image size checker
Drop in an image and instantly see which platform specs it fits. Flags wrong aspect ratios and too-small files — before you upload to the actual app.
Next step
Image looks good? Schedule it with PostLink.
Import the approved image into PostLink and schedule it across every platform it fits.
Social media image sizes — 2026 cheat sheet
Recommended dimensions per platform, verified April 2026.
| Platform & format | Size (px) | Aspect ratio |
|---|---|---|
| Instagram feed (square) | 1080 × 1080 | 1:1 |
| Instagram feed (portrait) | 1080 × 1350 | 4:5 |
| Instagram Reel / Story | 1080 × 1920 | 9:16 |
| TikTok video | 1080 × 1920 | 9:16 |
| YouTube thumbnail | 1280 × 720 | 16:9 |
| YouTube Short | 1080 × 1920 | 9:16 |
| YouTube channel banner | 2560 × 1440 | 16:9 |
| Facebook feed image | 1200 × 630 | 1.91:1 |
| Facebook Reel / Story | 1080 × 1920 | 9:16 |
| Pinterest standard Pin | 1000 × 1500 | 2:3 |
| Pinterest Idea / Video Pin | 1080 × 1920 | 9:16 |
| LinkedIn feed image | 1200 × 627 | 1.91:1 |
| X (Twitter) feed image | 1600 × 900 | 16:9 |
| Threads image post | 1080 × 1350 | 4:5 |
FAQ
Image size — common questions
What is the best image size for Instagram posts?+
For Instagram feed posts, use 1080 × 1080 pixels for square, 1080 × 1350 for portrait (4:5), and 1080 × 1920 for Reels and Stories. Portrait posts (4:5) take up more feed real estate and tend to outperform square in 2026.
What is the best image size for Facebook posts?+
Facebook feed images are best at 1200 × 630 pixels (1.91:1). For Facebook Reels and Stories, use 1080 × 1920 (9:16).
What is the recommended size for YouTube Shorts?+
YouTube Shorts should be 1080 × 1920 pixels (9:16 vertical). Shorts can be up to 3 minutes long as of the 2024 update.
What is the TikTok video size?+
TikTok videos and photos should be 1080 × 1920 pixels (9:16 vertical).
What size is a Pinterest Pin?+
Standard Pinterest Pins are 1000 × 1500 pixels (2:3 ratio). Video Pins and Idea Pins use 1080 × 1920 (9:16).
Does this tool upload my image?+
No. Images are read locally in your browser using the native Image API to detect dimensions. Nothing is sent to our servers.
Will a small image still work on social platforms?+
Platforms will scale small images up, but they lose sharpness and look pixelated. Aim for at least 80% of the recommended width for acceptable quality — this tool flags "Too small" when you dip below that threshold.
Why does the tool flag "Wrong ratio"?+
Social platforms crop or letterbox images that do not match the expected aspect ratio. A 1:1 image posted as a Reel will get padded with black bars. This tool flags any image whose ratio differs from the recommended by more than 5%.