> ## Documentation Index
> Fetch the complete documentation index at: https://docs.trypost.it/llms.txt
> Use this file to discover all available pages before exploring further.

# Preview post per platform

> Preview how a post will render on each enabled platform — applies platform-specific HTML sanitization and shows length stats against each platform's max.

## Path parameters

<ParamField path="post" type="string" required>
  The UUID of the post.
</ParamField>

## Behaviour

* The post must belong to the caller's current workspace; otherwise the response is `404`.
* Returns the original content alongside per-platform sanitized versions and length statistics.
* `original_content` is the plain text stored on the post (the editor saves plain text, not HTML).
* `sanitized_content` is the platform-specific rendering of that text. For most platforms this is identical to the original. Exceptions:
  * **LinkedIn / LinkedIn Page** — Unicode bold/underline substitution if the source contained `<strong>`/`<b>`/`<u>` markers (used by the AI generator).
  * **Mastodon** — a small allow-list of inline HTML is preserved (`p`, `strong`, `em`, `a`, `br`, `span`).
  * **Telegram** — rendered as Telegram's HTML allow-list (`b`, `i`, `u`, `s`, `a`, `code`, `pre`); block elements become line breaks and `@mentions` are kept.
* `truncated` is `true` only when sanitization actually shortened the byte count (e.g. an HTML entity got decoded). It is **not** a hard-cap signal — over-length content is rejected at publish time, never silently truncated. To detect over-limit content, compare `sanitized_length` against `max_content_length` yourself.

## Response

<ResponseExample>
  ```json theme={null}
  {
    "post_id": "9f1a2b3c-4d5e-6f7a-8b9c-0d1e2f3a4b5c",
    "original_content": "Launch day!\n\nExcited to share what we built.",
    "original_length": 44,
    "platforms": [
      {
        "post_platform_id": "a1b2c3d4-e5f6-7a8b-9c0d-1e2f3a4b5c6d",
        "platform": "x",
        "content_type": "x_post",
        "sanitized_content": "Launch day!\n\nExcited to share what we built.",
        "sanitized_length": 44,
        "max_content_length": 280,
        "truncated": false
      },
      {
        "post_platform_id": "b2c3d4e5-f6a7-8b9c-0d1e-2f3a4b5c6d7e",
        "platform": "linkedin",
        "content_type": "linkedin_post",
        "sanitized_content": "Launch day!\n\nExcited to share what we built.",
        "sanitized_length": 44,
        "max_content_length": 3000,
        "truncated": false
      }
    ]
  }
  ```
</ResponseExample>

<RequestExample>
  ```bash theme={null}
  curl https://app.trypost.it/api/posts/9f1a2b3c-4d5e-6f7a-8b9c-0d1e2f3a4b5c/preview \
    -H "Authorization: Bearer YOUR_API_KEY"
  ```
</RequestExample>