Fix my words. Keep my tone.

SamePen rewrites your everyday messages in your own voice — like you, on a good writing day.

How it works

Three steps, none of them clever

1

Paste your draft

Drop in your rough message. Add the one you're replying to, if context helps.

2

Set the tone

Two sliders — directness and warmth. Nudge them until the mix feels right.

3

Pick a rewrite

Two versions side by side: a light edit that tidies your text, and a full rewrite. Keep the one that sounds like you.

AI that picks up your pen — not its own

It learned from you, so it writes like you

Most AI rewriting averages everyone's writing into no one's: the same padded openings, the same tidy sign-offs. People can tell — a message that doesn't sound like you reads worse than one with typos.

SamePen builds a personal voice profile from samples of your own messages and rewrites inside those habits instead of over them. And it's not a black box — every rule it learned is right there to read, and yours to edit.

Your voice profile learned from samples of your writing
✓how you greet
✓sentence length
✓favorite words
✓punctuation quirks
✓how you sign off

Every rule visible. Every rule editable.

SamePen rewriting a shift-swap reply: a light edit and a full rewrite side by side
SamePen rewriting a shift-swap reply — notice it picked up "cover" straight from the message it's answering.
Roadmap

What's working, what's coming

Working now

  • Two rewrites side by side: a light edit and a full rewrite
  • Two tone sliders: directness and warmth
  • Optional context — paste the message you're replying to
  • Voice profiles built from samples of your own writing
  • Every rule the profile learned is visible, and yours to edit
  • Runs locally on your own machine: free, private, no account
  • Open source
Code on GitHub

Coming next

  • A hosted version with nothing to install
  • Invite codes for everyone on the waitlist, first
  • One-click copy on every rewrite
  • Your profiles, on every device you use

Later

  • A profile that keeps learning from the rewrites you keep
  • Import a chat export to build your voice in one step
  • Separate voices for work, friends, and clients
  • Simple, honest pricing

Be there when it launches

SamePen launches in English first, with more to follow. Leave your email and we'll tell you the moment it's live.