The last pass on AI drafts

Make AI writing read
like a person wrote it.

AI text has a tell, and it isn't the em dashes. Language models pick each word from a probability distribution, and that leaves a statistical signature across the whole piece.
You can't see it. Detectors can, and so can an editor who reads a lot of AI drafts.
MUKU rewrites the wording until the pattern is gone.

Copying, retyping or reformatting won't help — the signature lives in which words were chosen, not in any hidden character.
MUKU rewrites your draft with a model that doesn't carry the same signature, and shows you every change side by side.

Try it free See pricing

3,000 coins on sign-up — about 2 full rewrites. No card required.

A rewrite by MUKU

BEFORE / AFTER5 tells
1It is important to note that this approach is 2highly effective. 3Furthermore, it 4leveragesuses existing workflows and 5serves to reducecuts operating costs.
struck through removed underlined added
  • 1Filler
    It is important to note that → (removed)
    Opening filler that adds nothing
  • 4Word choice
    leverages → uses
    Corporate abstraction swapped for the plain word

How detection works

The giveaway is which words got picked.

A language model chooses each next word from a probability distribution. Some models also nudge that distribution on purpose — a watermark. Either way, no marker character is inserted anywhere in the output.

A detector reads the whole piece and measures the skew. People rarely spot it. Statistical checks flag it with high confidence, and they only get better as the sample grows.

Because the skew is in the word choices themselves, copying, retyping and reformatting all leave it intact. Removing it means rewriting the wording.

How AI text watermarking works: the model biases the probability of each next word, a detector finds that bias statistically, and copying or reformatting keeps the signal while rewriting or paraphrasing weakens it.
How the signal is embedded and found (Japanese) View larger →
MUKU rewrites your draft with a model that doesn't carry the same signature, so the pattern detectors look for is no longer there.

How to use

Paste. Rewrite. Ship.

Three steps. Nothing to configure.

STEP 01

Paste the draft your AI tool produced

STEP 02

MUKU rewrites the wording and evens out the tells

STEP 03

Read the diff, copy the result, ship it

Invisible characters get stripped too.

AI output often carries zero-width spaces, non-breaking spaces and other characters that never show on screen but survive a copy-paste. MUKU removes them and lists exactly what it found and how many. This part is deterministic — no model involved, no guessing.

Where it fits

The last pass before anyone reads it.

Before you publish an article

Draft with AI, run it through MUKU, then hit publish

Fiction and screenplays

Blend AI-assisted scenes into the voice of the rest

Business documents

Proposals and reports that shouldn't read like a template

Before you send it to a client

Keep your meaning, lose the wording that gives it away

Your text

Your draft isn't training data.

Unpublished work is worth protecting. Here is exactly what happens to what you paste.

  • Never used for training Your text is sent to the model to be rewritten and nothing else. It is not retained for training by us or by the provider.
  • You choose whether it's stored History is optional. Turn it off and nothing is kept after the rewrite returns. Leave it on and it is deleted after 3 days.
  • Only you can read it Stored rewrites are scoped to your account. Knowing an ID is not enough to open someone else's.
INPUTYour browser
TRANSITEncrypted (TLS)
REWRITELanguage model, no training use
STORAGEOptional — off, or 3 days

Pricing

Buy coins. Spend what you use.

No subscription. Coins come off as you use them, nothing comes off in a month you don't. They never expire.

40 coins = ¥1

STARTER

¥500

20,000 coins

≈ US$3 · to try it out

STANDARD

¥1,500

64,000 coins

≈ US$10 · 4,000 coins on top

PRO

¥3,000

136,000 coins

≈ US$20 · 16,000 coins on top

Prices are set in Japanese yen and your card issuer converts at their rate. The US dollar figures above are rough guides, not the amount you will be charged.

Three quality tiers.

Higher tiers rewrite more carefully and cost more coins.
Low for cleaning up drafts, High for anything someone else will read.

Tier Good for ~600 words ~2,400 words Rewrites per ¥500
Low Cleaning up drafts, working through volume ~113 ~267 ~177
Middle Internal documents, first pass on articles ~172 ~457 ~116
High ★ Anything that leaves your desk ~1,124 ~3,035 ~17

Coins are settled against what the rewrite actually used. We hold a little extra up front and return the difference immediately; if a rewrite fails you get all of it back.
Figures are estimates and move a little with the text.
New accounts get 3,000 coins — sign up, no card required.

FAQ

Questions

Is there anything to set up?

No. Paste your text and press one button.

Does it work on languages other than Japanese?

Yes. English works well. The rewrite reads your text and answers in the same language.

Is my text stored?

Only if you want it to be. History is optional; when it's on, rewrites are kept for 3 days and only your account can open them.