Humanizer Skill

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Humanizer is a free, open-source AI writing humanizer and detector.

  What it does · Install · Use it · Works in your editor · Learn more

What it does

AI writing has a fingerprint. Sentences all run about the same length, the same safe words keep
coming back, and filler like "in today's landscape" pads the gaps. Humanizer names 55 of those
habits, finds the ones in your text, and rewrites it in a voice you pick. The CLI scores the text
0 to 100 from four measurable signals, not from a count of the 55.

Two words worth a gloss. *Burstiness* is how much your sentence lengths vary, and an *AI tell* is
one of those giveaway habits.

Install

In Claude Code, through the 10x marketplace:

In 70+ other agents, one line. The skills CLI links the
skill into the directory your agent reads, or copies it with --copy:

Install without the installer (curl, or a per-editor path)

Project-scoped, so it travels with your repo:

Swap the folder for another editor: .cursor/skills/, .github/skills/ for Copilot, .codex/skills/,
.gemini/skills/, .windsurf/skills/, .continue/skills/. Use ~/.claude/skills/ for a global
install. Full paths per agent are in docs/editors.md.

Use it

1. Score something you already wrote. This scans, it does not change the file:

Lower is more human. The breakdown says which signal cost the points, so you know what to fix first.

2. Rewrite it in a voice. In your editor, call the skill on your own draft:
Before: This comprehensive guide delves into the intricacies of our authentication system.
After: This guide explains how our authentication system works.

The rewrite cuts the tells. It never adds a fact the source did not have.

3. Check the rewrite kept the facts. A rewrite that quietly drops a number is the real…