Voice profiles
A voice profile is a description of how you write, attached to your rewrites. Without one, the rewrite aims at the product's own voice. With one, it aims at yours.
Build one at rewr.it/voice.
Two halves
Measured — numbers. Mean and median sentence length, standard deviation, shortest and longest, paragraph shape, and the same tell statistics the report computes. Nothing here came out of a model.
Inferred — prose. A short summary of your habits, things you never do, register notes, exemplar sentences. A model has to read your writing to produce this.
The split is the free/paid line, and it is also the privacy line:
- A measured-only profile is computed in your browser and posted as numbers. No model call. No sample text reaches a server. There is nothing stored to disclose, and nothing to retain.
- An inferred profile requires storing your writing, so it costs money to build and it is Pro only.
What each plan gets
| Anonymous | Free | Pro | |
|---|---|---|---|
| Profiles | — | 1 | 3 |
| Inferred half | — | no | yes |
| Stored samples per profile | — | 0 | 20 |
| Sample words per profile | — | 0 | 12,000 |
| Profile budget in the prompt | — | 400 tokens | 900 tokens |
| Rebuilds included per period | — | 0 | 10 |
| Exemplar sentences | — | 0 | 3 |
| Register notes | — | 0 | 4 |
Past the included rebuilds, a rebuild is funded from the credit wallet.
How much writing you need
- 300 words is the floor. Below it, nothing is built.
- 1,500 words is where it stops being an estimate.
- 20,000 characters is the ceiling on a single sample.
The floor exists because sentence-length standard deviation — the statistic the whole feature rests on — is unstable on small samples. A dozen sentences can put it anywhere. A profile built on 200 words would describe the sample rather than the writer, and would do it confidently.
Give it writing you would be happy to have sound like you. Old emails you actually sent are better than anything written for the purpose.
Why the profile is capped in tokens
The rendered profile sits under the correctness instructions in the prompt. Past roughly 1,200 tokens it starts crowding them, and the rewrite gets better at sounding like you and worse at keeping your facts straight. The per-plan budget is a spend guard second and an attention guard first.
Deleting one
Delete a profile from the same page. DELETE /api/voice-profiles/:id removes
the profile and its stored samples. There is no soft delete.