auto post to multiple social media platforms
Auto post to multiple social media platforms from one package
Postwire is a multi-platform social media auto poster that turns one long article, one short post and up to three images into a correctly sized post for every platform you target.
Why copy-paste breaks across platforms
The same post does not fit everywhere. X counts 280 weighted characters and every URL as 23; Threads allows 500; LinkedIn about 3,000; Xiaohongshu wants a title of 20 characters or fewer and no outbound links; Instagram captions cannot hold a clickable link at all. Pasting one text into all of them either truncates it or breaks a rule.
Images differ too: Instagram needs at least one, X takes up to four, Medium pulls them from the canonical article. Doing this by hand for six platforms every day is where the time goes.
How Postwire fans one package out
Your agent sends a package with long markdown, a short post and 1–3 images. Postwire derives one variant per target platform: it picks the short or long text, enforces the length limit, places links where the platform allows them (on X, in a self-reply instead of the post body), adds the AI-disclosure label where required, and tags links with UTM parameters per platform.
Each variant then moves through queued → filled → approved → published, or failed with a structured reason. On every platform the Chrome extension on your Mac fills the post and you click publish.
Frequently asked
- Which platforms can Postwire post to?
- X, Threads, Instagram, Facebook Pages, Dev.to, Medium, Reddit, LinkedIn and Xiaohongshu. On all nine the Chrome extension fills the post in the platform's own editor and waits for you to click publish.
- Will the same text be posted everywhere?
- No. Each platform gets its own variant with its own length, image count, link placement and disclosure label, and Reddit gets a separate post per subreddit.
- Can I review posts before they go out?
- Always. Variants wait for you or your agent to approve them, and even after approval every post stops at the publish button until you click it.
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