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Give your caption a quick check.

Preview caption length using the displayed planning rules. Your text stays in this browser; each platform validates the final post.

0 characters · 0 words

  • Instagram0 / 2,200

  • Facebook0 / 63,206

  • LinkedIn0 / 3,000

  • TikTok0 / 2,200

  • YouTube0 / 5,000

  • X0 / 280

    Premium accounts get 25,000.

  • Threads0 / 500

  • Bluesky0 / 300

  • Pinterest0 / 500

  • Mastodon0 / 500

  • Google Business0 / 1,500

  • Reddit0 / 40,000

  • Telegram0 / 4,096

  • Discord0 / 2,000

  • Slack0 / 4,000

  • Tumblr0 / 4,096

  • Lemmy0 / 10,000

  • Nostr0 / 5,000

  • Farcaster0 / 320

  • Twitch0 / 500

  • Kick0 / 500

  • Dribbble0 / 4,000

  • DEV.to0 / 25,000

  • Medium0 / 50,000

  • WordPress0 / 50,000

  • Hashnode0 / 50,000

  • Listmonk (email)0 / 100,000

How this tool estimates length

  • X estimate weights characters (most Latin letters 1, many others and emoji 2) and counts every link as 23.
  • Bluesky estimate counts graphemes, so an emoji or a flag is 1.
  • Threads estimate counts an emoji as its UTF-8 byte length.
  • TikTok estimate counts UTF-16 units, so some emoji count as 2.
  • YouTube and Farcaster estimates count UTF-8 bytes, so non-Latin text uses more.
  • Mastodon estimate counts every link as 23 and a remote mention as just @user.

These are planning estimates, not a guarantee of current platform validation or parity with the PostDelegate composer. Networks without an assessed rule are omitted. Confirm the actual post in the publishing composer before it goes out.

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