What Is the Threads Character Limit (500 Characters)

The threads character limit is 500 characters for a standard post, reply, or quote repost, and that figure has held steady through 2026 as of this check. What trips people up is a second, much larger limit sitting alongside it: optional text attachments of up to 10,000 characters that don't count against the 500-character cap at all.

Threads Post Length Limit, in Full

Here's what actually counts toward the 500-character threads post length limit and what doesn't:

• Counts toward the limit: the main post text, @mentions, and emoji
• Doesn't count toward the limit: a full URL you paste in (links don't consume characters), an attached image or video, and text placed in the separate 10,000-character text attachment (available since March 2025)

That text attachment feature is effectively Threads' answer to needing more room without technically raising the core post limit: it shows up as an expandable block attached to a normal, short post, rather than as one long unbroken post itself.

Comparing Threads to X and Bluesky

For anyone writing one piece of text meant to post across several platforms, here's how the threads character limit stacks up:

Platform	Character limit
X (standard)	280
Bluesky	300
Threads	500

Threads gives you the most room of the three by a wide margin. Text written to fit X's 280-character limit will always fit on Threads with room to spare, but the reverse isn't true, a post written to use most of Threads' 500 characters will need trimming before it fits on X or Bluesky.

Worth knowing separately: even though the hard limit is 500, Threads' feed visually collapses a post behind a "see more" link once it runs past roughly 175 characters, so shorter posts still read as more complete in-feed even though they're technically well under the cap.

What This Means for Cross-Posting

If you're writing once and posting the same core message everywhere, the practical move is to write to the tightest limit in your platform lineup, typically X's 280, and let that same text work everywhere else without modification. If Threads is your primary platform and you want to use more of its 500-character room, plan on trimming that version down separately for X and Bluesky rather than assuming it will paste over cleanly.

On the scheduling side, Threads has been rolling out its own native scheduling tools through 2026, but as checked in July 2026, third-party schedulers still offer more, calendar views, cross-platform batching, and analytics that native tools generally don't match yet.

What About Threads' Bio Field

Threads pulls its bio directly from the same Instagram account it's linked to, so there's no separate Threads-specific bio field or limit to manage. Whatever bio character limit applies to your linked Instagram account is what shows up on Threads as well.

Worth adding for anyone optimizing engagement, not just fitting inside the cap: shorter Threads posts, well under the 500-character ceiling, tend to get read and replied to more often than posts that use most of the available space, since the feed still rewards a quick, scannable thought over a dense paragraph even when the room to write more exists.

Writing Once, Publishing Everywhere

Check your draft against the limit with the Threads character counter before you post, and use Posted Once to schedule the same post to Threads, X, Bluesky, and seven other platforms from one composer. Start free →.