Krex AI

Generation language

Default language for AI-written scripts, TTS voiceovers, and captions. You can still override per-job.

Analyzer suite

Analyzer · Rewrite

Your writing, reworked — with every change visible

Five modes: natural, paraphrase, professional, academic, or matched to a sample of your own voice. The rewrite comes back as a red/green diff — you see every removed and added word before accepting, and accepting is undoable.

1 credit per 4,000 words · up to 16,000 words per run

Five modes, one principle

Meaning and facts stay yours; only the voice changes. The rewrite is instructed to keep every fact, number, and name — and the diff lets you verify it did.

Match my voice

Give it a paragraph of your real writing and the rewrite targets how you actually sound, not a generic "natural" register.

Reviewable diff, always

No silent replacement: removed words in red, added words in green, Accept or Dismiss. Accepted rewrites land in your version history next to the original.

Built into the suite

Rewrite the draft, re-check its grammar, verify its citations — the document flows between tools without re-pasting, and Compare shows original vs. any version.

How it works

01

Pick a mode

Natural, paraphrase, professional, academic — or voice, with a 40+ word sample of your writing.

02

Rewrite

Up to 16,000 words per run; long documents rework in paragraph-boundary chunks with structure preserved.

03

Review the diff

Every change visible before you commit. Accept replaces your text (undoably); Dismiss costs nothing but the run.

What it will not do

Rewrite is for your own writing — clarity, register, voice. It is not a detector-evasion tool: we don't optimize output to beat AI detectors (ours or anyone's), and our own detector documentation says plainly that humanized text evades detection industry-wide. We won't sell both sides of that game.

Straight answers

Will the rewrite change my facts?

It's instructed to preserve every fact, number, and name, and to keep paragraph structure — and the diff exists so you can verify rather than trust. If something moved, you'll see it in red and green.

What does "match my voice" need?

At least 40 words of writing that's genuinely yours — an email, a post, an old essay. More sample gives a steadier voice match.

Can I use it to beat AI detectors?

That's not what it's for, and we decline to build for it. It reworks your own writing's clarity and register. Our detector docs are public about what evades detection — we're not selling the evasion.

The other instruments

Free to start — 50 credits a month, no card.

Rewrite is one of six instruments sharing one document — check, verify, and polish without pasting twice.