The Posted Once Blog
Practical guides on scheduling, posting at the right time, and growing on every platform.
Instagram Carousel Limit 2026 (10 Slides)
Instagram's carousel limit is 20 slides in the app but 10 through the API most scheduling tools use. Here's why both numbers are correct.
4 min read
Instagram Image Size Guide 2026
Current Instagram image dimensions for feed, Stories, Reels covers, and profile photos in 2026, plus why portrait now beats square posts.
4 min read
Instagram Reels Length Limit 2026 (3 Min)
The Instagram Reels length limit for July 2026: 3 minutes recorded in-app, 15 minutes uploaded, and why reach quietly drops once you pass 3.
4 min read
Instagram Video Dimensions 2026 (9:16)
Instagram video dimensions for July 2026: 1080x1920 vertical for Reels and Stories, plus the current feed video sizes, ratios, and safe zones to use.
4 min read
Instagram Upload File Size Limit 2026
Instagram's video file size limit for July 2026, broken down by feed, Reels, and Stories, plus the tighter cap third-party scheduling tools run into.
4 min read
LinkedIn About Section Limit 2026 (2,600)
The LinkedIn About section character limit is 2,600 in July 2026, but only the first 300 characters show before readers have to click see more.
4 min read
LinkedIn Hashtag Limit 2026 Explained
LinkedIn has no hard hashtag cap in July 2026, but its own creator guidance recommends 5 max, and going well past that can quietly throttle reach.
4 min read
LinkedIn Headline Character Limit 2026 (220)
LinkedIn's headline character limit is 220 in July 2026, but only about 70 characters show on mobile previews, so the opening words carry the weight.
3 min read
LinkedIn Image Size Guide 2026
LinkedIn image sizes for July 2026: 1200x1200 for feed posts, 1200x627 for link previews, and why mixing the two up ruins your thumbnail crop.
4 min read
Pinterest Pin Image Size 2026 (1000x1500)
Pinterest's own spec page recommends 1000x1500 (2:3) for standard Pins as of July 2026, and going taller than that ratio gets your image cropped.
4 min read
Threads Bio Character Limit 2026 (150)
The Threads bio character limit is 150 in July 2026, and it isn't a separate field at all, it's the same bio text your Instagram profile uses.
3 min read
TikTok Bio Character Limit 2026 (80)
TikTok's bio character limit is 80 in July 2026, the tightest bio cap of any major platform, which changes how you should write yours entirely.
3 min read
TikTok Hashtag Limit 2026 Explained
TikTok has no official hashtag limit in July 2026. The real ceiling is the shared 2,200 character caption cap that every hashtag eats into fast.
3 min read
TikTok Video Dimensions 2026 (9:16)
TikTok video dimensions for July 2026: 1080x1920 vertical is the standard, and horizontal footage uploaded as-is gets boxed in black bars instead.
3 min read
TikTok Upload File Size Limit 2026
TikTok's video file size limit scales with how you upload: roughly 72MB on Android, 288MB on iOS, and up to 4GB through the web uploader instead.
3 min read
TikTok Video Length Limit 2026 (Up to 60 Min)
TikTok's video length limit in July 2026: 10 minutes recorded in-app, 60 minutes uploaded as a file, a gap worth knowing before you hit record.
3 min read
Twitter (X) Bio Character Limit 2026 (160)
The X (Twitter) bio character limit is still 160 in July 2026, unchanged since long before the rebrand, making it the most stable spec on the platform.
3 min read
Twitter (X) Hashtag Limit 2026 Explained
X has no hard hashtag cap in July 2026, but posts with more than 2 hashtags reportedly see meaningfully less engagement than lighter tagging.
3 min read
Twitter (X) Image Size Guide 2026
The X (Twitter) image size guide for July 2026: 1200x675 for in-feed posts, plus profile, header, and multi-image dimensions that keep crops clean.
4 min read
Twitter (X) Upload File Size Limit 2026
X's video file size limit in July 2026: 512MB on a free account, up to 16GB for Premium subscribers on web and iOS, but not on the Android app.
3 min read
Twitter (X) Video Length Limit 2026 (140s)
X's video length limit for free accounts is a hard 140 seconds in July 2026, a number most people only learn once they hit it mid-upload live.
3 min read
YouTube About Section Limit 2026 (1,000)
YouTube's channel About section caps your description at 1,000 characters, separate from the 5,000-character video description limit. Full breakdown.
3 min read
YouTube Hashtag Limit 2026 (Max 60)
YouTube allows up to 60 hashtags per video across the title and description. Go over that and YouTube ignores every hashtag, not just the extras.
3 min read
YouTube Shorts Length Limit 2026 (3 Min)
YouTube Shorts can run up to 3 minutes long, raised from 60 seconds in October 2024. Here's the current max, the old limit, and the best length to actually use.
3 min read