Bluesky limits each post to 300 characters. This makes it hard to share detailed guides, personal stories, or step-by-step tutorials in a single post. A thread solves this by linking multiple posts together in a sequence that readers can follow from start to finish. This article explains how to create, format, and edit a long-form thread using Bluesky’s web app and mobile app.
Key Takeaways: Building a Bluesky Thread
- Compose button with plus icon: Add a new post to the thread while keeping the previous post visible for editing.
- Alt text field on each image: Describe images for accessibility — threads with images require alt text on every picture.
- Thread preview in the composer: Review all linked posts before publishing to catch typos and check flow.
What Is a Bluesky Thread and How Does It Work
A thread is a series of posts that Bluesky links together with a visible connector line. Each post is a separate reply to the previous one, but the platform groups them so readers can scroll through the entire thread without jumping between pages.
The 300-character limit per post means you must plan your content in chunks. A thread can hold any number of posts, but practical threads rarely exceed 20 to 30 posts. Longer threads become hard to navigate and may cause readers to lose interest.
Bluesky threads work on both the web app at bsky.app and the official mobile app for iOS and Android. The thread composer is not available on third-party clients such as Skeets or Graysky. You must use the official app to create threads.
Prerequisites for Creating a Thread
Before you start, you need a Bluesky account. No special permissions or settings are required. Threads are a core feature of the platform and are available to all users. You do not need to enable any option in Settings.
You also need a clear plan for your thread content. Write a rough outline of each post before you open the composer. This saves time and reduces the chance of hitting the character limit mid-sentence.
Steps to Create a Thread on Bluesky Web App
- Open the composer
Click the blue feather icon in the top-right corner of the web app. A new post box appears. - Write the first post
Type the first part of your thread. This post becomes the top of the thread. You can add images, links, or mentions as needed. Keep each post under 300 characters. - Add a new post to the thread
Click the plus icon at the bottom of the composer. A new post box appears below the first one. Bluesky automatically links this post as a reply to the first one. - Continue adding posts
Repeat step 3 for each additional post. The thread preview on the right side shows all posts in order. You can reorder posts by dragging the handle on the left of each post box. - Preview the thread
Click the Preview button at the top of the composer. The thread displays exactly as it will appear in feeds. Check for typos, broken links, and missing alt text. - Publish the thread
Click the blue Publish button. Bluesky posts all thread posts simultaneously. Each post appears in the feeds of your followers.
Steps to Create a Thread on the Bluesky Mobile App
- Open the composer
Tap the blue feather icon at the bottom of the screen. A new post box opens. - Write the first post
Enter the text for your first post. Tap the checkmark icon to confirm the text. - Add a new post to the thread
Tap the plus icon next to the first post box. A new post box appears below. The app automatically links the new post as a reply. - Continue adding posts
Repeat step 3 for each additional post. You can tap and hold the drag handle on the left to reorder posts. - Edit post content
Tap any post box to edit its text. Use the backspace key to delete a post entirely. The app removes it from the thread. - Publish the thread
Tap the Publish button at the top of the screen. The thread posts immediately.
How to Edit or Delete a Published Thread
Bluesky does not allow editing of individual posts after publishing. If you notice a mistake, you must delete the entire thread and republish it. To delete a thread, go to your profile, open the first post of the thread, tap the three-dot menu, and select Delete. All linked posts are removed.
To avoid this, use the Preview feature before publishing. Check every post for errors. Pay special attention to the last post, which often gets rushed.
Common Mistakes and Things to Avoid
Thread Posts Appear Out of Order
If you publish posts individually instead of using the thread composer, they appear as separate replies in the feed. Readers see them in reverse chronological order. Always use the plus icon inside the composer to keep posts linked.
Images Without Alt Text Prevent Publishing
Bluesky requires alt text on every image in a thread. If you attach an image and leave the alt text field empty, the Publish button stays gray. Tap the image, then tap Add Alt Text, and describe the image in 100 characters or less.
Character Limit Causes Truncated Posts
Bluesky counts characters including spaces and punctuation. If you exceed 300 characters, the composer shows a red counter. Shorten your text or split the content into two posts. Do not paste text that exceeds the limit — the composer will not let you publish.
Threads Do Not Show in Search Results
Bluesky’s search indexes individual posts, not entire threads. If you want your thread to be discoverable, include relevant keywords in the first post. The first post appears in search results and acts as the entry point for the thread.
Thread Creation on Bluesky vs Twitter
| Item | Bluesky | Twitter (X) |
|---|---|---|
| Character limit per post | 300 | 25,000 (Premium) |
| Thread composer | Built-in with preview | Not built-in |
| Image alt text requirement | Required for publishing | Optional |
| Post editing after publish | Not supported | Supported (30 min window) |
| Thread reordering | Drag and drop in composer | Not supported |
Bluesky’s thread composer is more polished than Twitter’s manual reply method. The preview and reordering features reduce errors. However, the lack of post editing after publishing means you must be careful before clicking Publish.
Now you can create, preview, and publish a long-form thread on Bluesky using the official web app or mobile app. Plan your content in chunks of 300 characters or fewer, use the plus icon to add posts, and preview the thread before publishing. For advanced threads, consider numbering each post in the text so readers can track progress even if the thread breaks in third-party clients.