MultiPost
Open-source browser extension that publishes one piece of content to many social platforms at once
MultiPost is an open-source (Apache-2.0) browser extension that lets you publish one post — text, images, or video — to more than ten social platforms in a single click, with 2,713 GitHub stars as of June 2026. It works through your existing logged-in browser sessions, so there's no separate login, registration, or API key, and it's free. For a founder it removes the copy-paste tax of cross-posting, but it's a distribution pipe, not a content engine: it pushes whatever you give it, so the growth still depends on having something worth posting and a steady cadence behind it.
What MultiPost is
MultiPost (github.com/leaperone/MultiPost-Extension) is a free, open-source browser extension for Chrome and Edge that distributes a single piece of content to many social platforms at once. Instead of opening ten tabs and re-pasting the same post, you write it once and MultiPost publishes it across the connected platforms. It runs on your existing browser sessions — there's no separate account, registration, or API key to manage — and it's released under the Apache-2.0 license, so the code is yours to inspect and self-host.
- One-click cross-posting of text, images, and video to 10+ social platforms.
- No login or API keys — it uses the browser sessions you're already signed into, and it's free.
- Open-source (Apache-2.0) and self-hostable, plus an Extension API and a RESTful API for wiring it into your own tools.
- Multi-language UI (English, Chinese, Japanese, French, Korean) for international makers.
Where MultiPost fits in a founder's growth stack
MultiPost is the distribution layer. Cross-posting by hand is one of the silent time sinks of founder-led marketing — the same update reformatted and pasted into platform after platform — and MultiPost collapses that into a single action. For a solo founder trying to be present on more than one channel without hiring, that's real leverage on the mechanical part of social.
But moving a post to ten places faster doesn't decide what the post should say, which platforms are worth being on, or how to keep showing up week after week. A pipe is only as valuable as what flows through it. The hard, compounding part of social growth is upstream of the publish button — see what should I post when building in public and how often should a founder post on X.
What MultiPost doesn't do — and what to pair it with
MultiPost deliberately solves one problem: getting a finished post onto many platforms quickly. It doesn't write the content, tailor the angle to each audience, decide your cadence, or — per its README — schedule posts for later. Those are the judgment-and-consistency parts of social, and they're exactly where most founder accounts stall.
| MultiPost handles… | …the work that makes it worth doing |
|---|---|
| Pushing one post to many platforms | deciding what's worth posting in the first place |
| The copy-paste mechanics | social content written in your voice, consistently |
| Reaching multiple channels at once | a steady cadence so the channels actually compound |
This is where Ceres — the AI Growth Officer complements a tool like MultiPost. Ceres is a managed AI marketing team: a social media specialist drafts platform-aware posts in your brand voice on a steady schedule, you approve what ships, and a cross-poster like MultiPost handles the mechanical fan-out. The extension moves the content; the team creates it. For the bigger picture of running social without hiring, see should a B2B founder be on LinkedIn or X.
FAQ
- Is MultiPost free?
- Yes. MultiPost is open-source under the Apache-2.0 license and, per its README, requires no login, registration, or API key — it works through your existing browser sessions. You can use the published Chrome or Edge extension or self-host from the repo at github.com/leaperone/MultiPost-Extension.
- Which platforms does MultiPost support?
- Its README states it can publish to more than ten mainstream social platforms — including ones like TikTok, YouTube, and several China-focused networks such as Weibo, Zhihu, and Xiaohongshu — covering text, image, and video content. The exact list changes over time, so check the repo for the current set of supported platforms.
- Does MultiPost schedule posts?
- Its README doesn't list scheduling — MultiPost focuses on publishing the same content to multiple platforms in one click, rather than queuing posts for later. If you need a planned cadence, you'd pair it with a tool or workflow that handles scheduling and the drafting behind each post.
You built it. Now grow it.
Ceres is a managed AI marketing team — specialists draft the SEO, social, and outreach that fill your links, you approve what ships. 14-day free trial, from $19/month.