Threads Character, Photo, and Topic Tag Limits
A Threads post can hold up to 500 characters and up to 20 images or videos. Threads also offers topic tags to categorize a post, but no Reels-style music. Here’s the number-by-number breakdown, useful for planning content without surprises.
1. How many characters can a Threads post hold?
A Threads post can run up to 500 characters. Beyond that, you need to split the message into a chain of posts to form a thread, the way linked tweets used to work.
That’s enough for a quick thought, a hook, or a question to your audience, but too short for a long, caption-style piece of writing. Threads works better as a fast-take format than as a space for detailed storytelling.
Threads by the numbers
2. How many photos and videos per post?
A Threads post accepts up to 20 images or videos at once. That’s a generous ceiling, more than enough for most uses: a set of event photos, several angles of a product, or a mini carousel.
Both numbers, characters and media, can shift from one update to the next: treat them as a snapshot of where the platform stands as of this article’s publication rather than a fixed rule.
3. Topic tags: what they’re for
Topic tags are subject labels you can attach to a post to tie it to a specific theme so people interested in that topic can discover it more easily. It’s not a regular hashtag typed into the text. It’s a categorization feature specific to Threads.
To use them well, pick a tag that genuinely matches the post’s subject (an industry, an event, an interest) rather than a generic or unrelated one. The goal is helping the right audience find the post, not artificially boosting reach.
4. Does Threads have music like Reels?
No. Unlike Instagram Reels, a Threads post doesn’t let you add a music track. If your content relies on music, that format stays limited to Reels and Stories, not Threads.
It’s one of the most concrete differences between the two: Threads is still built around text and conversation, even when it includes media.
5. What to remember before you post
In short: 500 characters, 20 media files, topic tags for categorizing, no music. For the full picture of Threads features, see the complete Threads guide, and for the scheduling question specifically, can you schedule posts on Threads?.
Once you know these limits, it gets a lot easier to prepare posts ahead of time and schedule them with a tool like Perroly instead of writing them in a rush.
Frequently asked questions
How many characters can a Threads post contain?
Up to 500 characters per post.
How many photos or videos can you add to a Threads post?
Up to 20 images or videos per post.
What are topic tags for on Threads?
They categorize a post around a specific subject, helping people interested in that topic find it more easily.
Can you add music to a Threads post?
No, that feature doesn’t exist on Threads, unlike Instagram Reels.