Cookie Statement
Last updated: October 20, 2026
Koutei PDF uses only the cookies needed to keep you signed in. It also saves things in your browser's local storage: your colour theme and, only if you turn it on, the details, clients and invoice list you keep on the invoice forms. We don't use advertising, analytics or tracking cookies, so we don't show a cookie banner.
1. What we use
sb-<project>-auth-token (may be split into .0, .1, …)
- Type
- Cookie
- Set by
- Koutei PDF, using Supabase Auth
- Purpose
- Keeps you signed in. Strictly necessary.
- How long
- Until you sign out, or up to 400 days
sb-<project>-auth-token-code-verifier
- Type
- Cookie
- Set by
- Koutei PDF, using Supabase Auth
- Purpose
- Completes a Google sign-in, email link or password reset securely. Strictly necessary.
- How long
- Until the sign-in finishes
theme
- Type
- Local storage
- Set by
- Koutei PDF
- Purpose
- Remembers the colour theme you picked. Never sent to us.
- How long
- Until you clear it
koutei-device-data
- Type
- Local storage
- Set by
- Koutei PDF
- Purpose
- Only if you turn it on, on the invoice, quote or receipt form: your business details (including your tax number, payment instructions and payment link, which may include bank details), the clients you save and your invoice list with what is paid and unpaid, so the form can fill them in. With “Remember my details” on, it also keeps the day you last made an invoice on the free invoice generator, so the page can count a return on a later day. Kept in this browser only and never sent to us.
- How long
- Until you delete it on the form ("Clear everything saved on this device") or clear your browser data
The sign-in cookies are strictly necessary: without them you can't stay signed in, so they don't need your consent. They are only set once you sign in or start signing in.
The saved-details entry is only created when you ask for it on the invoice, quote or receipt form: by ticking “Remember my details on this device”, saving a client, keeping an invoice list or importing a backup. It stays in your browser. We never receive it and it isn't sent with your requests; only what you put on a document is sent to us, to make the PDF, and we don't keep that either. It isn't part of your account, so it doesn't follow you to another browser or device. Anyone who can open this browser profile can see what is saved, so don't turn on saving in a browser other people use.
3. Other companies
When you open checkout to buy a paid plan, the checkout page loads Paddle.js from Paddle, and Paddle may set its own cookies or similar storage there to run the checkout and prevent fraud, as its privacy policy describes. If you choose Sign in with Google, Google uses its own cookies on its own sign-in pages. If you signed in with Google, your profile picture loads from Google's servers.
On the sign-in page, a security check from Cloudflare (Turnstile) tells people from automated bots. It runs in a frame served from Cloudflare's own address, challenges.cloudflare.com, and Cloudflare may keep information in your browser there to do the check, as its Turnstile Privacy Addendum describes. We set no cookie or browser storage for it.
4. Your choices
You can clear or block cookies in your browser settings. If you block the sign-in cookies, you won't be able to stay signed in. Clearing your browser storage resets your theme to the default. It also deletes the details, clients and invoice list saved on the invoice forms, so download a backup first if you want to keep them. You can delete them on the form at any time with “Clear everything saved on this device”. Because we never receive them, we can't restore them for you.
5. Changes
If we ever add cookies that aren't strictly necessary, such as analytics, we will update this page first and ask for your consent where the law requires it. Questions: privacy@kouteisystems.com. See also our Privacy Policy.