Developer Builds Open-Source Tool to Publish Blog Posts Across Six Platforms at Once

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A developer frustrated by spending 30 minutes manually cross-posting a single article across six platforms built an open-source automation tool called PolyPost. The tool addresses a common pain point: each platform uses a different editor, causing Markdown formatting to break in different ways during copy-paste workflows. PolyPost converts a single Markdown file into the appropriate format for each platform — including Juejin, Zhihu, CSDN, Cnblogs, SegmentFault, and Dev.to — and publishes to all of them in roughly 30 seconds. The project, built with Python, FastAPI, and Playwright, also includes a unified stats dashboard, a Chrome extension for session management, and scheduled publishing support. Released under the MIT license, the tool is available on GitHub and is aimed at developers who regularly maintain accounts on five or more content platforms.

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