Ad specs, without the 4,000 word blog post
Sizes, ratios, character limits and file limits for the major ad platforms. Every table links to the platform's own documentation and shows when we last checked it.
Google Ads
Responsive search, responsive display, Performance Max and YouTube.
Meta
Facebook and Instagram Feed, Stories and Reels.
TikTok
In-Feed video ad sizes, length and file limits.
Single image ad sizes and text limits.
Character counter
Paste your headlines and see which platform limits they pass.
Aspect ratio checker
Enter width and height to see which placements fit.
Most-used numbers
| Spec | Value | Details |
|---|---|---|
| Google RSA headline | 30 characters | RSA |
| Google RSA description | 90 characters | RSA |
| Google display landscape image | 1200 x 628 (1.91:1) | RDA |
| LinkedIn headline | 70 to avoid truncation, 200 max | |
| TikTok vertical video | 9:16, at least 540 x 960 | TikTok |
TODO: Newsletter signup (spec change alerts). Placeholder only, no link yet.