AI rewriter that keeps your keywords and loses the template voice

What this AI rewriter does

An AI rewriter takes text you already have and produces a new version that says the same thing in a different way: different sentence shapes, different word choices, a different tone if you ask for one. Humanizeo lets you do that at three sizes (a sentence, a paragraph, a full draft) and adds two things most rewriters skip: a locked list of words that may not change, and a detector score after each pass so you can see whether the result still reads machine-made.

The score matters more than it sounds. Plenty of rewriters produce text that is grammatically different and stylistically identical. Same 20-word sentences, same "Additionally," at the top of every paragraph, same three bullet points. You get a rewrite that is technically new and reads exactly as templated as the original. Measuring it is the only way to know.

Three ways to use it

AI sentence rewriter

Highlight one sentence, get five alternatives, pick one. Useful for the line in a landing page that everyone agrees is off but nobody can fix in a meeting. Keywords you have locked stay in every alternative. Tone applies per sentence, so you can make one line punchier without re-voicing the whole page.

AI paragraph rewriter

Select a paragraph and rework it as a unit. This is the sweet spot for most editing, because paragraph-level is where rhythm lives. The rewriter will vary sentence length across the paragraph, rotate openers, and fold or split sentences as needed. It will not add claims. If the paragraph had three facts, the output has the same three.

Whole-draft rewrite

Paste up to 30,000 characters and let the loop run. The detector scores every sentence, the rewriter fixes the flagged ones, the detector checks again, and it repeats until the draft scores clearly human on our detector. Sentences that already read fine are left as they are, which keeps the author's voice where it exists. On a 2,000-word draft that usually means a third to a half of the text is never touched at all, and the diff view shows you exactly which third.

Tone presets, and what each one actually changes

Preset	Sentence length	Contractions	Best for
Professional	Medium, varied	Light	B2B pages, reports, proposals
Conversational	Short to medium, fragments allowed	Heavy	Blog posts, newsletters, social
Journalistic	Lead short, body longer	Moderate	News-style articles, press releases
Technical	Precise, may run long	Minimal	Docs, spec sheets, changelogs

Presets change register, not content. Switching from professional to conversational will turn "does not" into "doesn't" and cut a subordinate clause in half; it will not invent an anecdote or add a joke.

Keeping keywords for SEO copy

This is the feature SEO teams ask about first. Add your target phrases (say, "commercial roof inspection" and "Denver") to the must-keep list and the rewriter treats them as fixed tokens. They appear in the output exactly as typed, same casing, same word order, in the same sentence they started in. If a rewrite would drop or alter one, that pass is rejected and retried.

Numbers, brand names and links get the same treatment automatically. So a product page that lists "starting at $49/mo" and links to a pricing table will come out with both intact. This is the same protection our AI to human text converter applies; the rewriter just gives you more room to reshape everything around the locked parts.

How it works

1. Paste text. Choose sentence, paragraph or whole-draft mode.
2. Pick a tone preset. Add must-keep keywords if you have them.
3. Run. The detector scores first, so you have a baseline.
4. The rewriter reworks flagged passages, re-scores, and loops. In whole-draft mode this is automatic; in sentence and paragraph mode you choose from alternatives.
5. Read the before/after scores and the highlighted diff. Copy out.

A paragraph rewrite, shown

Input, from a SaaS feature page, must-keep: "time tracking", "invoicing":

Our platform offers seamless time tracking and invoicing capabilities. Users can easily log their hours and generate professional invoices. This streamlines the billing process significantly. Additionally, it reduces administrative overhead for growing teams.

Output, conversational preset:

Log your hours, hit one button, and the invoice is done. Time tracking and invoicing live in the same screen, so nobody is copying numbers from a spreadsheet into a template at 6pm on the 30th. Less admin. Fewer mistakes. Your finance person will notice.

Both locked phrases are present, unchanged. The brochure adverbs are gone. Sentence lengths run 11, 27, 2, 2, 5. Detector: 84% likely AI before, 7% after.

What it will not do

It will not make things up to pad a paragraph. It will not change facts to make a sentence scan better. It will not process academic work; essays, theses and coursework are prohibited under our terms and the tool is built for editorial and commercial content you own. And it will not promise a score on any detector other than ours, because we do not control theirs.

Plans and allowances

Every plan includes a monthly rewrite and detect word allowance that resets on the 1st; the pricing page lists the numbers. Same engine on every plan. If you are unsure whether a rewriter is what you need or a lighter paraphrasing tool would do, the short version is: paraphrasing restates a source in your words; rewriting reshapes your own draft. Both sit on the same AI humanizer loop, and both count against the same allowance.