Free writing tools
Free tools, sorted by what you have in hand: a draft, some notes, or something to post on X. None needs an account to start, and none is a detector. Nothing here will tell you who wrote a piece of text, because we do not think an honest answer to that exists.
Fix a draft
Score it, then rewrite it, then score the rewrite, to see exactly what the model changed.
- Hemmingway-1
Slop Score
draft to score
Marks the habits that read as AI in your text and scores them per hundred words, so a long piece isn't punished for its length.
- Hemmingway-1
Sound Less Like AI
draft to rewrite
Hemmingway-1 rewrites your draft from what it means, instead of editing out patterns from a list, and shows you exactly what it added and cut.
Write from notes
Every one of these is told to add nothing you didn't say: the facts come from your notes, never invented.
- Hemmingway-1
Turn Notes into an Email
notes to email
Write down who it's to and what you need to say, in any order, and Hemmingway-1 writes the email, your dates and numbers kept, no filler.
- Claude · Opus 5.5
Write LinkedIn Posts with Opus 5.5
notes to post
Turn a few notes into a LinkedIn post, written by Claude Opus 5.5 in one of 5 voices you pick.
- Claude
Xiaohongshu Converter
blog to xiaohongshu
Paste an English roundup or listicle and Claude turns it into a Xiaohongshu post for Chinese readers, in the tone, length and emoji you pick.
Post it on X
- Claude
Write X Threads with Claude
notes to thread
Turns notes or a blog post into a thread that reads as one piece, not a post cut into pieces. Sonnet 5 by default, Opus 5.5 for a longer thread.
- Claude
Reply on X with Claude
tweet to reply
Paste a tweet and your own take, and get three replies in your voice, not a generic reply.
- Claude · Opus 5.5
Turn a PR into a Launch Post with Opus 5.5
PR to post
Paste a public GitHub pull request and Claude Opus 5.5 writes the launch post, using only the PR's own title, description and commits.
The two models behind them
The 3 tools above run on Hemmingway-1, a 27B open-weight model with no daily limit. The other 5 run on Claude, Sonnet 5 by default with Opus 5.5 built into the LinkedIn and pull request writers and optional on the rest, metered per tool since Claude is a paid API. What changed in Opus 5.5's writing is in Claude Opus 5.5 writing, whether to fix a draft with a humanizer or start with a better model is the longer argument in AI humanizer or a better model, and How to Write with AI Without Losing Your Voice is the method underneath every one of these pages.
Past one passage
A pasted draft, a fetched tweet or a fetched pull request is all any of these pages can see. StashBase is an open-source, local-first writing workspace where you draft and revise with Claude Code or Codex beside your own files, so an edit can be checked against the notes it is supposed to agree with. Humanize works in the document there: select prose in a Markdown file and the rewrite comes back as suggested changes to accept or reject.