The Threads character limit is 500 characters per post — nearly double X’s 280, but small enough to keep the feed fast. For longer writing, Threads supports text attachments of up to 10,000 characters that display as an expandable block inside your post. Your Threads bio is capped at 150 characters (it mirrors Instagram’s bio limit, since the accounts are linked), and unlike X, links count at their normal length.
This guide covers every Threads character limit in 2026, how the 10,000-character attachment works, and how 500 characters compares to every rival platform. Draft your post and check the count in the free Text Character Counter.
What Is the Threads Character Limit?
Every standard Threads post is capped at 500 characters, including spaces, punctuation, emojis, hashtags (Threads calls them topic tags), and links. Hit 500 and the app stops accepting input — there’s no Premium tier that raises the ceiling, which keeps the playing field level in a way X’s free/Premium split doesn’t.
500 characters works out to roughly 70–100 words — three to five sentences. It’s a deliberate middle ground: enough room to complete a thought without a thread, short enough that the feed still scrolls like a conversation.
Every Threads Character Limit in One Table
| Threads Field | Character Limit (2026) |
|---|---|
| Post | 500 characters |
| Text attachment (long-form) | 10,000 characters |
| Reply | 500 characters |
| Bio | 150 characters (shared with Instagram) |
| Username | 30 characters (your Instagram handle) |
| Topic tag | One per post |
| Link in post | Counts at full length |
How Does the 10,000-Character Text Attachment Work?
When 500 characters isn’t enough, Threads lets you attach a long-form text block of up to 10,000 characters (roughly 1,500–1,700 words) to a post. It appears as an expandable attachment — your 500-character post becomes the hook, and readers tap to open the full text.
That structure is the strategy: the 500-character post is your headline and pitch; the attachment is the essay. It’s Threads’ answer to X Premium’s 25,000-character posts, except free for everyone.
When to use which:
- One idea, one beat: a single 500-character post.
- A sequence of ideas: a thread of connected 500-character posts (each gets its own limit, like X threads).
- A genuine article: post + text attachment, with the hook doing the selling.
How Does Threads’ Limit Compare to Other Platforms?
Threads sits deliberately between the micro and macro platforms:
| Platform | Post Limit |
|---|---|
| Bluesky | 300 characters |
| X (free) | 280 characters |
| Threads | 500 characters |
| 3,000 characters | |
| Instagram caption | 2,200 characters |
| 63,206 characters |
Two practical differences from X worth knowing:
- Links count at full length on Threads. X charges every URL a flat 23 characters; Threads charges the real length, so a long URL can eat a fifth of your post. Shorten links before posting.
- Emojis are friendlier. Threads counts characters more like Instagram than X — but emojis still count, so an emoji-heavy post shrinks your text budget either way.
What’s the Ideal Threads Post Length?
Threads rewards conversational posts, and the engagement pattern echoes other text platforms: short beats long. Posts in the 100–250 character range — one sharp observation or question — tend to travel furthest, because Threads’ algorithm heavily favors replies, and short posts invite them.
A simple 2026 playbook:
- Lead with the hook — even at 500 characters, the first line decides the scroll-past.
- End with a question when you want replies; Threads’ ranking loves conversation.
- One topic tag, chosen for search. Threads allows a single tag per post — make it the phrase people actually search, not a decoration.
- Save link posts for when the link is the point. Text-first posts typically out-reach link drops.
Draft at full length, then cut to the strongest 250. A character counter makes the trimming visible — watch the count fall as the post gets sharper.
Frequently Asked Questions
What is the Threads character limit?
500 characters per post and per reply. There’s no paid tier with a higher post limit.
How do I write a long post on Threads?
Use a text attachment — Threads supports long-form text blocks up to 10,000 characters that readers expand from your post, or chain multiple 500-character posts into a thread.
What is the Threads bio character limit?
150 characters — the same as Instagram, since your Threads profile is linked to your Instagram account.
Do links count toward the Threads character limit?
Yes, at their full length. Unlike X, Threads doesn’t compress every URL to a fixed 23 characters, so shorten long links before posting.
Is the Threads limit bigger than Twitter’s?
Yes — 500 characters versus 280 on a free X account. X Premium allows 25,000-character posts, while Threads offers everyone 10,000-character text attachments for free.
How many words is 500 characters on Threads?
Roughly 70–100 words, or three to five sentences.
Conclusion
Threads gives everyone 500 characters, a free 10,000-character attachment for long-form, and no paywall on either — the constraint is level, so the writing decides. Hook first, question last, one search-worthy tag.
Draft your next Threads post in the free Text Character Counter and trim to the sharpest version before the 500 wall trims it for you.