undash
Makes AI text feel more human by removing em—dashes
undash launched on June 11, 2025 with 298 votes, #92 of 7,999 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Undash is a Chrome plugin that automatically removes em dashes from AI-generated text upon pasting. The tool requires no setup and works across websites, social media, emails, and other platforms. It targets users who want to quickly clean up artificial intelligence-generated content for a more natural appearance without manual editing.
written from the facts on this page · September 2026
From the sources
Undash is a simple Chrome plugin that automatically removes long em dashes (—) from AI-generated text when you paste it anywhere: websites, social media, emails, and more. No setup needed. Just install, enable, and paste clean text instantly.
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- III instructed AI to create tool to clean AI-generated text: undsh.comMay 2026 · undsh.com · ▲5
I can't say "I created a tool" because obviously I only had an idea, then asked Cursor to implement it and 15 minutes later it was ready ;) Often I found I was manually replacing em dashes with hyphens in AI-generated text before I use them in copy, PR descriptions etc. It still feels like a shame to flare the text "you wrote" was not really human made. To automate these removals, here it is: super tiny online page. I made it for myself, but whoever wants, you can use it as well. I am not going to monetize it or promote more than this post.
- HNHacker News em dash user leaderboard pre-ChatGPT2025 · gally.net · ▲377
The use of the em dash (—) now raises suspicions that a text might have been AI-generated. Inspired by a suggestion from dang [1], I created a leaderboard of HN users according to how many of their posts before November 30, 2022—that is, before the release of ChatGPT—contained em dashes. Dang himself comes in number 2—by a very slim margin. Credit to Claude Code for showing me how to search the HN database through Google BigQuery and for writing the HTML for the leaderboard. [1] https://news.ycombinator.com/item?id=45053933
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