Hi HN! In a nutshell -- Writermark is a free, open, nonprofit certification tool that watches writing sessions, tests data against an algorithm, and signs the text content as "Human Authored" if it appears that a human did, in fact, author the text.

Writermark collects telemetric (and anonymous) data about keypresses, records your total time spent on a document, validates that the text has not been altered inorganically or pasted into the editor, and scores the final result. If the score is high enough, a certificate is issued that can be verified at https://writermark.org/verify at any later time. The server is stateless and stores zero information -- all your data lives on your local machine in a server-signed JWT.

Try it live: https://writermark.org/#try or integrate it into your own app: https://writermark.org/developers (npm install @writermark/sdk)

Or download Wintertext (https://wintertext.com), a free desktop writing app with Writermark built in. Wintertext takes this ecosystem a step further, packing the certificate and the text together into a .wtxt proprietary file type, while also allowing export and verification for .docx, .md, and .rtf files. Any document created with Wintertext is automatically certified, lives on your local machine, and the app will remain free forever.

I built Writermark because I think we're losing the ability to tell whether a human wrote something (which scares me deeply, especially in the world of fiction). If you are also concerned about the progress of AI infringement into human writing, I'd love to hear from you, hear your feedback, respond to any questions, and start a larger conversation.

If you're curious to know more about the general philosophy, feel free to read this longer overview on the tech: https://www.writermark.org/blog/working-to-verify-and-protec...

I am currently in the process of establishing nonprofit status for this project. I think that human authorship verification should be free. Whether its my solution or someone else's, I think telemetric verification of the writing process is going to become one of multiple important ways that we prove that something is human authored.

Thank you very much for your time.

Yolm.

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user:	jhyolm
created:	March 9, 2026
karma:	2