Short answer: A Bluesky post can be up to 300 characters. As of October 2026 it can also carry up to 10 images (2 MB each) or one video up to 10 minutes and 300 MB, with up to 2,000 characters of alt text per image. Bios allow 256 characters and display names 64.
Below is every limit in one table, followed by the details that trip people up: how characters are counted, how links count, and which numbers changed this year.
On this page:
- The direct answer
- Every Bluesky limit in one table
- How Bluesky counts characters
- Do links count?
- Image limits
- Video limits
- What changed in 2026
- FAQ
The Direct Answer
| Question | Answer |
|---|---|
| Post character limit | 300 characters (graphemes) |
| Images per post | Up to 10, 2 MB each |
| Video length | Up to 10 minutes, 300 MB, one per post |
| Alt text | 2,000 characters per image |
| Bio | 256 characters |
| Display name | 64 characters |
Every Bluesky Limit in One Table
Numbers are as of October 2026. Where a limit comes from the AT Protocol lexicon rather than the app, it applies to every Bluesky app, not just the official one.
| What | Limit | Notes |
|---|---|---|
| Post text | 300 graphemes | Plus a 3,000-byte cap on the raw text |
| Images per post | 10 | Raised from 4 in June 2026; posts with 5+ use a carousel |
| Image file size | 2 MB each | Raised from 1 MB in April 2026; 2,000,000 bytes, not 2 MiB |
| Videos per post | 1 | Images and video can't be mixed |
| Video length | 10 minutes | Raised from 3 minutes in August 2026 |
| Video file size | 300 MB | A verified email is required to upload video |
| Alt text | 2,000 characters per image | Can't be changed after posting |
| Languages per post | 3 | Set in the composer; used for language filters and feeds |
| Hashtag length | 64 graphemes | Not counting the # |
| Display name | 64 graphemes | Change any time |
| Bio (description) | 256 graphemes | Links in bios are clickable |
| Pinned posts | 1 | Shown at the top of your profile |
| Starter pack | 150 people, 3 feeds | See our starter pack guide |
| Custom feed name | 24 graphemes | Description up to 300 |
| List name | 64 graphemes | Description up to 300 |
| Chat message | 1,000 graphemes | Direct messages and group chats |
| Editing a post | Not possible | See Can you edit a Bluesky post? |
How Does Bluesky Count Characters?
Bluesky counts graphemes – the characters you see on screen – not bytes or code points. That matters for anything outside basic English:
- Emoji count as one. Even a family emoji built from several code points is a single grapheme.
- Accented letters count as one. An "é" is one character whether it's stored as one code point or two.
- Every script counts the same. Japanese, Arabic and Hindi text get 300 visible characters just like English, which makes Bluesky posts relatively roomy in languages with dense scripts.
The catch is a second, hidden limit: the post's text can't exceed 3,000 bytes of UTF-8. Ordinary text never gets close. A post made mostly of complex emoji can, because a single multi-person emoji can take 20+ bytes. If the counter says you have room but the post won't send, that's why.
Developers: graphemes are also why you can't just use len() or .length to check a post. Use a grapheme-aware splitter, and remember that facets index into the text by byte offset, not character position.
Do Links Count Toward the Bluesky Character Limit?
Yes, but usually less than you'd expect in the official app. When you paste a long URL, the app shortens the visible text to something like example.com/articles/how-t... and stores the full address in a link facet. You're charged for the shortened text, not the whole URL.
Two caveats:
- Third-party tools vary. A scheduler or bot that posts the URL as plain text uses up its full length. If you schedule Bluesky posts through a tool, check how it handles links.
- Link cards are free. The preview card under a post doesn't count toward the 300. Many people paste the link, wait for the card, then delete the URL from the text entirely to get all 300 characters back. The card keeps working.
What Are Bluesky's Image Limits?
As of October 2026, a post can carry up to 10 images at up to 2 MB each. Both numbers changed this year: the per-image size doubled from 1 MB in April 2026 (app version 1.121), and the image count rose from 4 to 10 in June 2026 (version 1.123), with a new carousel for posts with five or more images.
- The app resizes for you. The official app compresses large photos to fit, so you rarely see the size limit. Tools posting through the API have to do that themselves.
- 2 MB means 2,000,000 bytes. A file your computer reports as "1.95 MB" may be counted in binary units and actually be over.
- Common formats work. JPEG, PNG and WebP are the safe choices. Animated GIFs come through the GIF picker rather than as uploaded images.
- Every image gets alt text. Up to 2,000 characters each. Our guide to adding alt text on Bluesky covers how to write good descriptions.
Older guides and some scheduling tools still say four images and 1 MB. Those numbers are out of date.
What Are Bluesky's Video Limits?
As of October 2026: one video per post, up to 10 minutes and 300 MB. Bluesky raised the limit from 3 minutes in late August 2026 and said uploads became two to three times faster at the same time.
- Verify your email first. Video upload requires a verified email address on your account.
- No mixing. A post can have images or a video, not both.
- Daily caps exist. Bluesky also limits how much video one account can upload per day; normal use won't hit it.
- It's re-encoded. Bluesky processes uploads for streaming, so upload a clean, high-quality file rather than a pre-compressed one.
- Captions help. Videos support caption files and alt text, which matters for the many people who scroll with sound off.
What Bluesky Limits Changed in 2026?
| When | Change |
|---|---|
| February 2026 | Drafts added (v1.116) |
| April 2026 | Image size limit doubled to 2 MB (v1.121) |
| June 2026 | Up to 10 images per post (v1.123); group chats launched |
| August 2026 | Video length raised to 10 minutes, file size to 300 MB |
The 300-character post limit has not changed. If Bluesky changes any of these again, we'll update this page. For the bigger picture on how Bluesky compares to its rivals, see Bluesky vs Threads vs X in 2026.
Frequently Asked Questions
What is the Bluesky character limit?
A Bluesky post can be up to 300 characters. Bluesky counts graphemes, the characters you see, so an emoji counts as one. There is also a hidden 3,000-byte cap on the raw text that very emoji-heavy posts can hit.
How many images can you post on Bluesky?
As of October 2026, up to 10 images per post, raised from 4 in June 2026. Each image can be up to 2 MB, and you cannot mix images and video in the same post.
How long can Bluesky videos be?
As of October 2026, videos can be up to 10 minutes long and 300 MB, after an increase from 3 minutes in August 2026. A post can contain one video.
Do links count toward the Bluesky character limit?
Yes, but the official app shortens long URLs in the visible text and stores the full address in the link itself, so a long link usually costs far fewer than its full length. Tools that post through the API may count the full URL.
What is the Bluesky alt text limit?
Alt text can be up to 2,000 characters per image in the Bluesky app. Most good descriptions need far less.
What are the Bluesky bio and display name limits?
A display name can be up to 64 characters and a bio up to 256 characters. Both count graphemes, like posts.
Composing in Skyscraper
Skyscraper's composer is built around these limits:
- A character counter and per-post languages
- Up to 10 photos, alt text, a GIF picker and video
- Paste or drag images and videos in, including screenshots
- Alt text from the share sheet, or written by Apple Intelligence
- Posts, replies, quotes and whole threads for when 300 characters isn't enough