Threads Character Limit 2026 (500 or 10K)

Threads posts are capped at 500 characters, nearly double what X gives free accounts, but that is not the whole story anymore. A 2025 addition most guides still under-cover lets you attach up to 10,000 additional characters to any post, which changes how much you can actually say on Threads if you know the feature exists.

Threads Character Limit

Checked as of July 2026, here is the full threads character limit picture:

Field	Character limit
Main post / reply	500
Text attachment (added 2025)	10,000
Bio	150
Media per post	Up to 20 images or videos

Threads Post Character Limit vs the Text Attachment

The threads post character limit of 500 applies to the main body of a post, the part that shows up directly in the feed. The text attachment is different: it attaches as an expandable block, similar to a "read more" section, and does not count against your 500-character main post. Links also do not count toward your character limit either way.

In practice this means a Threads post can carry a short, punchy 500-character hook up front, with up to 10,000 characters of additional context, a longer story, or detailed notes attached behind it for anyone who wants to keep reading. That is a meaningfully different tool than a flat 500-character cap suggests.

Threads Text Attachment Limit: When to Actually Use It

The threads text attachment limit is worth using for:

• Longer explanations that would otherwise need to be split across an awkward reply thread.
• Behind-the-scenes or process posts, where the short version hooks people and the attachment delivers the full story.
• Repurposed long-form content, like turning a blog post or newsletter section into a single Threads post instead of ten short ones.

For a normal, quick update, the 500-character main post is still the better format. Threads is a fast-scrolling, mostly chronological feed, and burying a short thought inside an unnecessary attachment does not help it land any better.

Writing Within the Limit

Since the main post is what shows in the feed regardless of whether an attachment exists, treat those 500 characters as the actual pitch. A character counter shows exactly where you stand before you post, so you are not guessing whether your caption fits before you hit publish.

Keeping Threads Posts on Schedule

Once the writing fits, getting it out at a consistent time matters just as much on Threads as anywhere else. Posted Once schedules Threads posts alongside your other platforms, so a well-timed 500-character hook does not depend on you remembering to open the app. Start free →

500 characters is still the number that shapes a Threads post. 10,000 is the number most people writing about Threads still do not realize exists.