A Claude Code humanizer is a writing skill you can run inside your coding workflow to clean up AI-shaped prose before it ships. This page explains what the popular blader/humanizer skill is, when the web tool is enough, and when to install the skill.
blader/humanizer is a 21.4k+ ★ open-source skill for Claude Code and OpenCode. It removes the visible signs of AI-generated writing from text so a draft reads more natural.
The upstream project is by Siqi Chen, GitHub user blader. Blader Humanizer is an unofficial web guide and tool inspired by that repo, not the official project.
The skill follows the same basic idea as the Wikipedia guide to signs of AI writing: look for generated-text habits, then rewrite toward plain, specific prose.
The web version and the Claude Code skill solve the same writing problem, but they fit different workflows.
| Use case | Web tool | Claude Code skill |
|---|---|---|
| Best for | fast check One-off drafts, emails, short pages, ChatGPT output, Gemini output, and quick copy edits. |
workflow fit Docs, README files, changelogs, launch copy, support macros, and repeated drafts inside Claude Code. |
| Setup | No install. Paste text, detect patterns, humanize, copy the result. | Install the skill once, then call it from your editor or ask Claude Code to humanize a file. |
| Privacy | Runs in your browser and does not upload pasted text. | Runs in your Claude Code / OpenCode workflow. Your normal editor and model-session privacy rules apply. |
| Voice matching | Good for generic cleanup: fewer tells, clearer prose, less filler. | Better for personal voice calibration because you can provide style samples and run it across many drafts. |
The official path is simple: clone Siqi Chen’s upstream repo into your Claude skills directory.
If you just need a ready-to-install skill folder, use this page’s Claude Skill ZIP button. For the step-by-step download and unzip flow, go to the install page.
/install is for transaction intent: download the ZIP, see what is inside, unzip it, add it to Claude Code.
This page is for guide intent: understand what the Claude Code humanizer skill is, how it differs from the web tool, and how voice calibration changes the result.
The biggest reason to install the skill is not the first cleanup pass. It is calibration. Give the skill a short sample of your own writing, then ask it to rewrite the AI draft with that rhythm and level of bluntness.
For a developer, this matters on docs and launch notes: a clean but generic rewrite can still sound like model output. A calibrated rewrite can keep your shorter sentences, naming habits, technical caveats, and preferred level of detail.
A humanizer is useful editing help. It is not evidence laundering, and it should not replace judgment.
This site is not built to bypass Turnitin, GPTZero, or similar tools. Use it to make an assisted draft clearer before a person reads it.
Em dashes, triads, and polished transitions are not proof of AI authorship. The signal is a cluster of habits, not one punctuation mark.
The last pass still belongs to a human. Check facts, source claims, delete vague phrasing, and keep the lines that actually sound like you.
Paste a draft for a quick web check, or use the Claude Skill ZIP button in the tool to build an installable skill folder locally.
Unofficial and not a detector-bypass tool. This page is not affiliated with Siqi Chen, GitHub user blader, the upstream blader/humanizer repo, Anthropic, OpenAI, or Google. The checker and ZIP generator are for clearer editing, not for misrepresenting authorship or evading AI-detection systems.
For installation steps, ZIP contents, and the download-first flow, use the install page. For pattern definitions, use the AI Writing Patterns hub.
If you want to check whether a draft has obvious generated-writing signals before deciding on a rewrite, use the Signs of AI Writing checker. To return to the main tool, open Blader Humanizer.