# Posting rules for each platform

> Check media limits, per-post settings, quirks and analytics for X, LinkedIn, Facebook, Instagram, Threads, TikTok, YouTube and Bluesky before you post.

> For the complete documentation index, see [llms.txt](https://docs.conviapro.com/llms.txt).

Convia Pro publishes to X (Twitter), LinkedIn, Facebook, Instagram, Threads, TikTok, YouTube and Bluesky, and each platform has its own rules for accounts, media files, per-post settings and analytics. Each section below covers one platform: which accounts connect, what you can post, its media limits and settings, its quirks, and which numbers Convia collects from it. For text limits, tagging and what to do when a post fails, see [Publishing to each platform](https://docs.conviapro.com/docs/publishing-to-platforms.md).

## Posting to X (Twitter)

**Accounts:** any X account.

**What you can post:** text, up to 4 images, or a video. Links go in the text and X builds its own preview.

| Media | Limit |
|---|---|
| Images | Up to 4. JPG, PNG, GIF or WEBP. Up to 5 MB each, or 15 MB for an animated GIF |
| Video | MP4 or MOV, up to 512 MB, from 0.5 to 140 seconds |
| Aspect ratio | Between 1:3 and 3:1 |

**Quirks:**

- X counts every link as 23 characters, however long it is, and so does Convia.
- A first comment is posted as a reply to your own post.

**Analytics:** impressions, likes, replies and reposts. A new post is refreshed once a day for its first nine days, checked again at two weeks and one month, and keeps its one-month numbers after that. **Add existing post** is not available for X.

## Posting to LinkedIn personal profiles

**Accounts:** personal LinkedIn profiles, connected as **LinkedIn**.

**What you can post:** text, images (up to 20), video, link posts and PDF documents, which LinkedIn shows as a swipeable carousel.

| Media | Limit |
|---|---|
| Images | Up to 20. JPG, GIF or PNG, up to 5 MB each. Animated GIFs up to 250 frames |
| Video | MP4 only, from 75 KB to 500 MB, from 3 seconds to 30 minutes |
| PDF document | Up to 100 MB and 300 pages |

**Quirks:**

- Some landscape PDFs fail in LinkedIn's own document processing, even when uploaded on LinkedIn directly. Portrait PDFs work reliably.
- First comments are not available on personal profiles. They work on company pages through **LinkedIn Company**.
- The mention picker tags organizations, not people.

**Analytics:** Convia does not collect post performance for personal profiles. LinkedIn analytics come from company pages connected as **LinkedIn Company**, and a personal profile's card can offer **Enable analytics** to connect one. Posts from personal profiles cannot be brought in with **Add existing post**.

## Posting to LinkedIn Company Pages

**Accounts:** LinkedIn Company Pages, connected as **LinkedIn Company** in **Add Account**. You sign in as an admin of the page and pick it, and any admin of the page can reconnect it later. Whether your plan includes LinkedIn Company shows in **Add Account**.

**What you can post:** the same as personal profiles: text, up to 20 images, video, link posts and PDF documents, with the same media limits as [LinkedIn personal profiles](#posting-to-linkedin-personal-profiles).

**Quirks:**

- First comments are supported, up to 1,250 characters, and can tag organizations.

**Analytics:** impressions, reach, reactions, comments and shares. LinkedIn reports company page statistics over a rolling 12 months, and Convia tracks your 100 most recent posts per account; older posts keep the numbers already collected. A new post is refreshed once a day for its first nine days, checked at two weeks and one month, and keeps its one-month numbers after that. Posts you published on LinkedIn directly can be brought in with **Add existing post**, and arrive as published with their original date.

## Posting to Facebook Pages

**Accounts:** Facebook Pages only. On plans with one account per platform, you connect a single Page. Reconnecting keeps the card on the same Page.

**What you can post:** text, a single image, video, and link posts. Facebook does not offer multi-image carousels for organic Page posts.

| Media | Limit |
|---|---|
| Images | JPEG, PNG, GIF, BMP or TIFF, up to 30 MB |
| Video | MP4 or MOV, up to 4 GB, from 3 seconds to 240 minutes, at up to 30 frames per second |
| Video title | Up to 255 characters, from the **Published title** |

**Quirks:**

- Fill in the **Published title** on video posts. Leave it blank and the internal name is used as the public title.
- An `@` in a Facebook post does not link to anyone.
- First comments need the Page to have granted permission to comment.

**Analytics:** reactions on every post, and shares on Page posts. Facebook does not report shares on videos, so videos show a dash. Comments, views, reach and watch time depend on the permissions the Page granted when it connected; Convia shows a prompt on accounts that need to reconnect for them. A new post is refreshed twice a day for two weeks, checked at two weeks and one month, then once a month. **Add existing post** is available.

## Posting to Instagram

**Accounts:** Professional or Business Instagram accounts.

**What you can post:** a single image, a carousel, or a video. Instagram requires media, so there are no text-only posts. A video publishes as a **Reel** unless you choose **Story**.

| Media | Limit |
|---|---|
| Images | JPEG or PNG, up to 8 MB, 320 to 1,440 pixels wide, aspect ratio between 4:5 and 1.91:1 |
| Carousel | 2 to 10 items, images and videos mixed |
| Reels | MP4 or MOV, from 3 seconds to 15 minutes. Portrait 9:16 is accepted |
| Story video | Up to 60 seconds and 100 MB |

**Settings per post,** in the composer's **Privacy & additional settings** card:

- **Publish as**: **Reel** or **Story (24 hours)**. A story disappears after 24 hours and takes no caption and no first comment, because Instagram shows neither on a story.
- **Also show in feed**: on by default for every reel. Off keeps the reel in the Reels tab only, out of your profile grid and followers' feeds.
- **Trial reel**: off by default. A trial reel is shown to people who do not follow you first, and you decide in Instagram later whether to share it with followers. Instagram requires around 1,000 followers; if your account is not eligible, the reel publishes as normal.

Set any of these as the account's default under **Default publishing settings** on its card in **Social Channels**. New posts start with those values; existing drafts and scheduled posts keep their own. In the approval queue, posts that publish differently carry a chip: **Story · 24h**, **Reels tab only** or **Trial reel**.

**Analytics:** likes and comments. Views, reach and saves depend on the permissions the account granted when it connected; reconnecting turns the rest on. Instagram does not report shares or reposts to anyone, and story performance is not measured. A new post is refreshed twice a day for two weeks, checked at two weeks and one month, then once a month. **Add existing post** brings in feed posts and reels, not stories.

## Posting to Threads

**Accounts:** Professional or Business Threads accounts.

**What you can post:** text, images, a carousel, or video.

| Media | Limit |
|---|---|
| Images | JPEG or PNG, up to 8 MB, 320 to 1,440 pixels wide |
| Video | MP4 or MOV, up to 1 GB, from 1 second to 5 minutes |
| Carousel | 2 to 20 items, images and videos mixed |

**Quirks:**

- A first comment is posted as a reply, and needs the account to have granted permission to reply.
- If Threads refuses a video, the publishing log names the file size and what to do next.

**Analytics:** views, likes, replies and reposts. The numbers depend on the insights permission the account granted when it connected. A new post is refreshed twice a day for its first nine days, checked at two weeks and one month, then once a month. **Add existing post** is available.

## Posting to TikTok

**Accounts:** Creator or Business TikTok accounts.

**What you can post:** videos, and photo posts of one or more images. There are no text-only posts and no first comments.

| Media | Limit |
|---|---|
| Photos | JPEG or WebP only (PNG is not accepted), up to 20 MB, at most 1,080 × 1,920 pixels. Larger images are refused when you attach them |
| Photo carousel | 2 to 35 images |
| Video | MP4, WebM or MOV, up to 4 GB and 10 minutes |

**Settings TikTok requires,** in the composer's **Privacy & additional settings** card:

- **Who can view this post**: **Everyone**, **Friends (mutual follows)**, **Followers** or **Only me**. Only the options TikTok offers for your account appear, and you must choose one.
- **Allow comments**, **Allow Duet** and **Allow Stitch**, each off until you turn it on. Duet and Stitch are hidden on photo posts, and any you have turned off in TikTok itself are unavailable.
- **Disclose: this content promotes yourself, a brand, product, or service**. Turn it on, then choose **Your brand**, **Branded content**, or both. TikTok labels the post as promotional content or a paid partnership. Branded content cannot be set to **Only me**.
- A consent line confirms you agree to TikTok's Music Usage Confirmation, and its Branded Content Policy when the post is branded.

Set defaults for these on the account's card under **Default publishing settings**. Posts written by automations start from those defaults, and show **Only me unless set** in the approval queue when no audience has been chosen. AI assistants connected to Convia cannot choose the privacy level or branded-content disclosures; those stay with you.

> [!WARNING]
> TikTok can treat a brand new account that starts publishing through a scheduling tool as a bot, and the usual result is a permanent ban. Convia asks you to tick a warning before connecting. Post from a new account by hand for a while first.

**Quirks:**

- TikTok gives a video its public link only after its own review, which can take a while. When the link arrives late, Convia finds the video on your account and adds the **View on TikTok** link, as long as it can tell which video belongs to the post.
- If TikTok refuses a post because the account is posting too often, Convia flags the post and tries again about three hours later, up to two times, before marking it failed for review.
- If TikTok stops accepting a connection, the post editor and **Social Channels** say so and offer **Reconnect**.

**Analytics:** views, likes, comments and shares. Accounts connected before analytics launched show **Enable analytics** on their card; one click reconnects with analytics access. A new post is refreshed twice a day for its first nine days, checked at two weeks and one month, then once a month. **Add existing post** is available.

## Posting to YouTube

**Accounts:** any YouTube channel.

**What you can post:** videos only. Shorts are posted from the composer, campaigns and automations; full episodes are published from the episode's **Distribution** page.

| Item | Limit |
|---|---|
| Video formats | MP4, MOV or WebM |
| Title | Up to 100 characters |
| Description | Up to 5,000 characters |
| Tags | Up to 500 characters in total |

**Settings per post:** **Visibility** (**Public**, **Unlisted (anyone with link)** or **Private (only you)**), a **Scheduled publish time** for private videos, **Made for Kids** (required by YouTube, off unless you turn it on), **Category** (People & Blogs unless you choose another), **Tags**, **Default audio language** and a playlist. AI assistants connected to Convia cannot set **Made for Kids**.

**Quirks:**

- A title over 100 characters, or a description over 5,000, stops the upload with a message saying which is too long, instead of uploading with the end cut off. A post with no title takes one from the start of its text.
- A custom thumbnail, end screens and a Short's related video can only be set in YouTube Studio once the video is on YouTube. **Finish on YouTube** uploads early so you can do this.
- Deleting a post in Convia leaves the video on YouTube.

**Analytics:** views, likes, comments, watch time and subscriber changes, plus thumbnail impressions and click-through rate, which YouTube reports about two days behind. A new video is refreshed twice a day for two weeks, checked at two weeks and one month, then once a week. **Add existing post** is available.

For finishing Shorts, the related-video routine and changing a video's public time, see [YouTube publishing](https://docs.conviapro.com/docs/youtube-publishing.md).

## Posting to Bluesky

**Accounts:** any Bluesky account, connected with your handle and an **app password** you create in your Bluesky settings. There is no sign-in redirect. Bluesky is not offered on the Client Portal's **Your Channels** page for that reason.

**What you can post:** text, up to 4 images, one video, and link posts with a link card.

| Media | Limit |
|---|---|
| Images | Up to 4, JPEG or PNG. Bluesky shows several images as a grid, not a carousel |
| Video | One MP4 per post, up to 100 MB and 3 minutes |

**Quirks:** a first comment is posted as a reply to your post.

**Analytics:** likes, replies, reposts and bookmarks, which Convia shows as saves. Bluesky reports no views or reach anywhere, so Bluesky posts have engagement counts but no engagement rate. A new post is refreshed twice a day for its first nine days, checked at two weeks and one month, then once a month. **Add existing post** is available.

## Related

- [Publishing to each platform](https://docs.conviapro.com/docs/publishing-to-platforms.md): supported platforms, text limits, tagging, and what to do when a post fails.
- [Connect social accounts](https://docs.conviapro.com/docs/connect-social-accounts.md): add, connect, reconnect and remove the accounts these rules apply to.
- [Posts](https://docs.conviapro.com/docs/posts.md): the composer, the Privacy & additional settings card and first comments.
- [YouTube publishing](https://docs.conviapro.com/docs/youtube-publishing.md): Finish on YouTube and finishing Shorts in YouTube Studio.
- [Analytics](https://docs.conviapro.com/docs/analytics.md): how the numbers each platform reports are shown and compared.

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Source: https://docs.conviapro.com/docs/platform-posting-rules · Section: Planning & publishing · Last updated: 2026-10-03