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Free tool

Post Length Checker

Write a post once and see how it fits on X, LinkedIn, Threads, Instagram, TikTok, YouTube and Bluesky.

Sample

A post by a made-up creator, checked the same way yours would be:

I stopped writing a new post for every platform. Now I write one version on Sunday night, check where each app cuts it off, and trim from there. The idea stays the same everywhere. The template I use to plan the week is on my site: https://example.com/weekly-plan #contentcreator #writingtips #creatorbusiness #batching #socialmedia #smallbusiness

Fits 6 of 8.Over on X and Bluesky.1 thing to check below

XPost, standard account

Over

342/ 280Over by 62

Where it gets cut off

…on my site: https://example.com/weekly-plan #contentcreator #writOver the limit from here: ingtips #creatorbusiness #batching #socialmedia #smallbusiness

  • 1 link, 23 each
  • 6 hashtags
  • Each line break counts as 1 on X.

Links count as 23. Emoji and Chinese, Japanese or Korean characters count as 2.

BlueskyPost

Over

350/ 300Over by 50

Where it gets cut off

…site: https://example.com/weekly-plan #contentcreator #writingtips #creOver the limit from here: atorbusiness #batching #socialmedia #smallbusiness

  • 1 link
  • 6 hashtags

Counts characters as you see them, so a family emoji is 1. Links count in full here.

ThreadsPost

Fits

350/ 500Fits, 150 to spare

  • 1 link (up to 5)
  • 6 hashtags
  • Threads uses one topic tag per post. Only #contentcreator would be used.

Each emoji counts as its size in bytes, usually 4 or more, as Threads describes in its developer docs.

LinkedInPost

Fits

350/ 3,000Fits, 2,650 to spare

  • 1 link
  • 6 hashtags

Every character counts, links included.

InstagramCaption

Fits

350/ 2,200Fits, 1,850 to spare

  • 1 link
  • 6 hashtags (up to 5)
  • Check: Instagram allows up to 5 hashtags. This has 6.

Every character counts, hashtags included.

TikTokCaption

Fits

350/ 2,200Fits, 1,850 to spare

  • 1 link
  • 6 hashtags

The limit in TikTok’s developer docs, which posting and scheduling tools use. Most emoji count as 2.

YouTubeTitle, from your first line

Fits

48/ 100Fits, 52 to spare

Your first line, checked as a video title.

YouTubeDescription

Fits

350/ 5,000Fits, 4,650 to spare

  • 1 link
  • 6 hashtags
  • YouTube shows up to three of these hashtags by your title.

The whole post, checked as a video description.

Where these limits come from

Each one is from the platform’s own help or developer page, checked 2026-10-04. Facebook isn’t here because Meta doesn’t state a post limit on an official page.

  • X: X posts can be up to 280 characters. Links count as 23, emoji as 2, and Chinese, Japanese and Korean characters as 2. docs.x.com, checked 2026-10-04
  • X: X’s open-source counting rules: which characters count as 1 or 2, and links as 23. github.com, checked 2026-10-04
  • Bluesky: Post text can be up to 300 characters as you see them, and 3,000 bytes. github.com, checked 2026-10-04
  • Bluesky: A hashtag can be up to 64 characters as you see them. github.com, checked 2026-10-04
  • Threads: Text posts are limited to 500 characters, and each emoji counts as its size in bytes. developers.facebook.com, checked 2026-10-04
  • Threads: A post can have up to 5 links. developers.facebook.com, checked 2026-10-04
  • Threads: One topic tag per post; the first valid tag is used. developers.facebook.com, checked 2026-10-04
  • Threads: Topic tags are 1 to 50 characters, with no periods or ampersands. developers.facebook.com, checked 2026-10-04
  • LinkedIn: The character limit for a post is 3,000 characters. www.linkedin.com, checked 2026-10-04
  • Instagram: Captions can be up to 2,200 characters. developers.facebook.com, checked 2026-10-04
  • Instagram: Instagram allows up to 5 hashtags in a reel or post (announced by @creators on December 18, 2025; Instagram's developer page still shows the old limit of 30). www.threads.com, checked 2026-10-04
  • Instagram: Captions can have up to 20 @ tags. developers.facebook.com, checked 2026-10-04
  • TikTok: A video caption posted through TikTok’s developer tools can be up to 2,200 characters, with most emoji counting as 2. developers.tiktok.com, checked 2026-10-04
  • YouTube: Video titles have a limit of 100 characters. support.google.com, checked 2026-10-04
  • YouTube: Titles and descriptions can’t include < or >. developers.google.com, checked 2026-10-04
  • YouTube: Video descriptions have a limit of 5,000 characters. support.google.com, checked 2026-10-04
  • YouTube: Through the developer interface, a description can be up to 5,000 bytes. developers.google.com, checked 2026-10-04
  • YouTube: With more than 60 hashtags, YouTube ignores every hashtag on the video. support.google.com, checked 2026-10-04
  • YouTube: Up to three hashtags from the description appear by the video title. support.google.com, checked 2026-10-04

Check your own post

  • Your post against eight limits on seven platforms at once
  • Exactly where each one cuts it off
  • A trimmed copy that fits, one tap per platform
  • The weekly publishing plan: a template for Notion or Google Sheets, a planning routine and a pre-publish checklist

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Post Length Checker: character limits for X, LinkedIn, Threads, Instagram, TikTok, YouTube and Bluesky | Rise Productive