Platform spec cheat sheet
Every character limit, aspect ratio and length cap we track, in one CSV — generated at the moment you download it, so it is current rather than commemorative.
Fills in 37 live specifications on download · newest verified 22 September 2026
Preview
Platform,Specification,Current value
Instagram,Caption limit,"2,200 characters (verified 22 Sept 2026)"
Instagram,Bio limit,"150 characters (verified 22 Sept 2026)"
Instagram,Hashtag limit,"30 maximum; 3–5 focused tags recommended (verified 22 Sept 2026)"
Instagram,Feed aspect ratio,"1:1, 4:5 or 3:4 (4:5 recommended for reach) (verified 22 Sept 2026)"
Instagram,Reel aspect ratio,"9:16 vertical, 1080×1920 (verified 22 Sept 2026)"
Instagram,Reel maximum length,"3 minutes (up to 20 minutes for some accounts via uploads) (verified 22 Sept 2026)"
Instagram,Carousel maximum,"20 slides (verified 22 Sept 2026)"
Instagram,Story length,"60 seconds per card (verified 22 Sept 2026)"
TikTok,Caption limit,"4,000 characters (verified 22 Sept 2026)"
TikTok,Bio limit,"80 characters (verified 22 Sept 2026)"
TikTok,Maximum video length,"10 minutes (60 minutes for some accounts); sweet spot 21–34 seconds (verified 22 Sept 2026)"
TikTok,Video aspect ratio,"9:16 vertical, 1080×1920 (verified 22 Sept 2026)"
TikTok,Photo mode maximum,"35 images (verified 22 Sept 2026)"
Facebook,Post limit,"63,206 characters (40–80 characters get the best engagement) (verified 22 Sept 2026)"
Facebook,Reel maximum length,"90 seconds (verified 22 Sept 2026)"
Facebook,Video aspect ratio,"4:5 recommended in feed; 9:16 for Reels and Stories (verified 22 Sept 2026)"
YouTube,Title limit,"100 characters (about 70 visible in search) (verified 22 Sept 2026)"Shortened for the page. The download is the complete file with every specification filled in and dated.
