Rewrite AI-drafted Japanese so it stops reading like a stock blog post: formality, punctuation and closings all fixed. 5 free runs a day.
Japanese AI humanizer
Feed it Japanese text a model drafted and it rewrites the specifics that give that away: mixed full-width and half-width punctuation, stray spaces that don't belong in Japanese, and a formality level that starts polite and drifts plain partway through.
It runs on our AI server: your text is sent, rewritten and returned in a few seconds. You get 5 free runs every rolling 24 hours, no account needed.
What gives it away
Japanese has no spaces between words and its own punctuation rules, so a lot of what marks generated text shows up there, not in vocabulary.
Workflow
Three steps, nothing to set up first.
Why it matters
No single stray space stops a reader cold. It's the pile-up: formality drifting mid-document, the same connectors opening every paragraph, a closing line every reader has already seen elsewhere. Together it reads as generated well before anyone could point to the exact cause.
In content meant to build trust with a Japanese audience, that reads as exactly the kind of post people skim past. It can also cost a business real credibility with a client who reads the correspondence and quietly notices none of it was written by hand. This app targets the accumulation directly so the result reads like one person wrote it.
Being upfront
Japanese has meaningfully less training data than English, so subtleties a native editor would catch can slip through, especially around keigo, honorific language used with clients or superiors, where the wrong level can read as genuinely rude rather than just off.
There's also a flattening risk: casual, business and regional Japanese all exist, and left unspecified a rewrite tends to default to one safe, generic register. Worth knowing rather than assuming the output is neutral or that it already reflects the register you actually needed.
Straight answer
No. We don't test against AI detectors and can't promise what one will report afterward.
What it reliably does is hold formality steady, vary the connectors and cut the stock closings. That's a genuine improvement in how the writing reads, detector or not.
In practice
Businesses localising into Japanese who draft with a model because writing Japanese directly is slower, and who check formality before anything reaches a client.
Students bringing an AI-assisted essay back into their own voice, within their school's policy, and content teams who want a first draft to stop reading like every other AI-generated post in their niche.
Paste it above and hit Humanize. It holds formality steady, varies connectors and drops stock closings, returning the result in seconds.
Yes: 5 free runs every rolling 24 hours, no account needed.
Five per rolling 24-hour window, coming back 24 hours after each specific run.
It's sent to our AI server to be rewritten and returned. It isn't published or used to train models.
Yes, holding one formality level consistent through a document is one of its main jobs.
Yes, phrases like いかがでしたか are flagged and reworked as part of the rewrite.
Yes, punctuation is normalised to consistent full-width Japanese conventions.
No, and that's not what it's built for. It changes how the Japanese reads to a person, not how a detector scores it.
It tries to, but honorific language is one of the harder areas for any model given thinner Japanese training data. Check anything client-facing yourself.
It shouldn't. Facts and names stay put; only rhythm, connectors and formality move. Read the result before using it.
The detector reads text and flags the patterns marking it as machine-written. This app rewrites the text so fewer of those patterns are there.
Yes, within reason. Longer pieces take a bit longer, and checking in sections beats reviewing one long block.
It removes obvious tells, not your company's specific voice. A short pass of your own afterward usually closes the gap.
Not yet. One piece of text at a time, within your 5-run daily allowance.
It tries to hold your original register, but a heavily mixed draft can end up smoothed toward a generic middle ground.
That's governed by your school's own policy on AI-assisted tools, which we don't set. Check with them first.
Yes, when they're stacked as a default connector rather than doing real work.
Yes, it works fully in a phone browser and the layout stacks cleanly on a small screen.
Yes. It works on the Japanese text itself, regardless of which model or person wrote it.
It tries not to. The rewrite reads the register your draft is already in first, then holds that register rather than defaulting everything to polite form.
Read it end to end for formality drift, confirm no name or number moved, and if the content is client-facing, have a native speaker glance at anything involving keigo.