Last updated: 24 August 2026
We do not keep what you give us. Text you paste and files you upload are processed and returned, not stored. We do not use your content to train anything. We run no advertising and no advertising trackers. There is one exception and we would rather lead with it than bury it: if you use the optional rewrite, your text is sent to another company’s AI model to be rewritten, and comes straight back. Nothing else you submit ever leaves our systems.
We measure how many people visit, which pages they read, and which steps of the tool they use, with a tool that stores nothing on your device. We keep a record of each job you run: the date, whether it was a file or pasted text, how many words it had, and what it cost you. That record is your credit history and it is what a balance is made of. Never the text or the file itself. If you create an account, we hold your email address and name. If you write to us, we use your address to reply and for nothing else.
When you paste text or upload a document, it is sent to our processing engine, cleaned, and returned to you. It is not written to our database and we keep no copy. Uploaded files exist briefly as a temporary file while being processed and are discarded when the request finishes.
One exception, because it is the only time your text leaves our systems. The optional rewriting step, the part that addresses statistical watermarks, cannot run on our own servers. Your text is sent to a third-party language model, reached through Vercel AI Gateway, which rewrites it and returns it. Today that model comes from Mistral. This happens only when you run the rewrite. Scanning, invisible-character removal, and file metadata cleaning never leave our infrastructure.
The companies that can see text you submit are the ones named in the table below. If we ever move the rewrite to a different provider, we update that table before the change goes live, so the list is a promise about who sees your text rather than a snapshot of who saw it last week.
We do not use your content to train models, to improve detection, or for any purpose other than returning your result.
We keep no copy of what you submit. We do keep a record that you submitted something, because that is how a credit balance works.
Each time you clean something, one line is added to your credit history. It records the date and time, whether the input was a file or pasted text, how many words it contained, and how many credits it cost, along with what the run cost us to perform. If you have an account you can read your own history at any time on your account page. It never contains your text, your file, or the name of your file.
We keep that history for as long as you have an account. Delete your account and your whole history is deleted with it, automatically and at the same moment. You do not have to ask us.
Our servers also keep ordinary technical logs of each request: the time, how long it took, the size of the input, the file type, and how many words it had. These carry no file names and no content. They sit with our hosting company, which keeps them for a limited period set by its platform rather than by us.
An account is optional and the tool works without one. But the moment you clean something, even signed out, we create a guest account for your browser so your free credits have somewhere to live. It holds no name, no email address and nothing about you: only an identifier, your credit balance, and the history described above. Your browser remembers it with a cookie called uc-guest that lasts a year. Clear your browser data and it is gone for good, along with any credits on it, because we have no way to connect it back to you.
If you create a real account, we store your email address, your name, and a profile picture URL if your sign-in method supplies one, along with the dates your account was created and last updated. Any credits left on your guest account move across to it. Database access rules restrict each account to its own record.
If you sign in with Google, Google gives us your email address, your name, and your profile picture. We use them to create your account, to show you who is signed in, and to send you service messages about your account. We do not receive, request, or store anything else from your Google account, and we never share this information with anyone. You can revoke our access at any time at myaccount.google.com/permissions.
If you sign in with a password, we store your email address and a scrambled version of your password that cannot be reversed.
The contact page does not send anything to us. When you press Send message it builds a draft in your own email app, filled in with the subject and message you typed, and your app sends it. Nothing you type on that page reaches us, and nothing is stored anywhere, until you send it yourself.
What arrives is an ordinary email. We use your address to reply to you and for nothing else: we do not add it to a mailing list, and we do not connect it to any account or to anything you have scanned. Our inbox is a Gmail account, so Google holds those messages the way it holds any mail sent to a Gmail address. We keep correspondence only for as long as it is useful for answering you, and you can ask us to delete it.
We use no advertising cookies, and no advertising trackers.
Three things are stored on your device, and all three are there to run the tool you asked for: a guest session, the uc-guest cookie that finds it again so your free credits survive until you come back, and, once you sign in, the session cookies that keep you signed in. The full list, with lifetimes, is on the cookie policy.
We do measure visits, using PostHog. It is configured to store nothing at all on your device: no cookies, no local storage. That is why this site has no cookie consent banner. It means we cannot recognise you between visits, which we accept as the price of not tracking you. If your browser sends a Do Not Track signal, we do not measure you at all.
We also record which steps of the tool you use, so we can see where it is going wrong: that a scan finished, how many hidden characters it found, that a clean started or failed, that you reached the point where free credits run out. These are counts and yes-or-no answers about the tool, never about you and never about what you submitted. File names are reduced to a file type before anything is recorded, and lengths and timings are recorded as ranges rather than exact figures.
Every page also runs a background check from Cloudflare that tells real people apart from automated scripts. It is there because free credits are worth money and would otherwise be farmed by a program. It sees your IP address and some ordinary details about your browser, and it stores nothing on your device under our domain. It is not advertising and it does not follow you around the internet.
| Who | What they do | What they see |
|---|---|---|
| Vercel | Hosts the site and runs the processing | Standard server logs: IP address, time, and which page was requested |
| Supabase | Stores accounts and credit balances, and handles sign-in | Your account record and your credit history |
| Cloudflare | Tells real visitors apart from automated scripts, on every page | Your IP address and ordinary details about your browser. No content, and nothing about what you submitted |
| PostHog | Counts visits, which pages are read, and which steps of the tool are used | Pages viewed, rough location from IP address, browser and device type, and which actions you took in the tool with counts of what was found. Nothing stored on your device, and never the content you submit, your file names, or your text |
| Mistral, reached through Vercel AI Gateway | Performs the optional rewrite | The text you submitted for rewriting, at the moment it runs |
| Runs the inbox you write to, and sign-in if you choose it | Any email you send us, and that you signed in to our site |
All of these companies are based in the United States, so if you are in the UK or EU, your information is processed there.
We do not sell your information, share it for advertising, or transfer it to anyone not listed above.
Wherever you live, you may ask us to show you what we hold about you, correct it, delete it, receive a copy of it in a portable form, or object to how we use it. Write to us at the address below and we will respond within 30 days. We do not currently offer a one-click download of your data. Ask us and we will send it to you.
You can delete your account yourself at any time, from your account settings. Deleting your account deletes your account record and your entire credit history with it. Your email address, your name and every line of your history are removed from our database in that moment, not marked for removal later, and your sign-in is destroyed with them. Because we do not retain submitted content, there is nothing of yours left beyond one small record, and here is exactly what that is.
We keep a scrambled fingerprint of your email address, and not the address itself. It is there for one reason: the free credits you get for signing up are meant to be once per person, and without it anyone could delete their account and collect them again and again. What we keep is the fingerprint, the date it was first given, and which free credits it was. The fingerprint cannot be turned back into your address, although somebody who already holds it and a guess at your address can check whether the two match. It carries no name, no balance, no credit history, and nothing about anything you cleaned here.
Deleting your account also ends any credits still on it, and unused credits are not refunded on deletion. If you want a refund, ask for it first.
If you are in the UK or EU: our lawful basis is performance of a contract for your account, your credits and the rewrite, and legitimate interest in keeping the service working and free from abuse, which covers our server logs, the anti-script check and our measurement of how the site is used. You have the right to complain to a data protection authority: in the UK that is the Information Commissioner’s Office, and in the EU it is the authority in your own country.
Un-Claude is not intended for anyone under 18 and we do not knowingly collect their information.
If we change this policy we will update the date above. Material changes to how we handle your content will be announced on the site.