Terms of Service
Last updated: October 22, 2026
These terms are the agreement between you and LangTo for using the document translation service at langto.ai. LangTo is operated by Felix, an individual developer ("we", "us"). By creating an account or using LangTo, you accept these terms. If you don't accept them, don't use LangTo.
1. What LangTo does
LangTo translates PDF documents, scanned pages included, and gives you back a PDF that keeps the original's layout. Stamps, signatures, QR codes and barcodes keep the original's pixels. One AI model translates the document, and before delivery a second AI model reviews each page for meaning, numbers and names; a page whose review didn't finish is marked. You can then edit any sentence online and download the translation on its own or side by side with the original.
LangTo doesn't provide certified translations and doesn't act as a certifying body. Whether an office, school, court or other recipient accepts a translation is up to that recipient.
2. Who can use LangTo
You must be at least 16 years old. If you use LangTo for a business, you accept these terms for that business.
3. Your account
You sign in with Google or with a code we email you. Keep your email and Google accounts secure: anyone who can sign in as you can use your pages and open your documents. Tell us at contact@langto.ai if you think someone else has used your account.
4. Pages and prices
Translation is paid for in pages. One page of a PDF counts as one page, whether it is a scan, a photo or a digital file, and every page of the file is translated.
- Free pages. Every account gets 5 free pages once, when it is created. Free pages never expire. At busy times, a translation that uses only free pages may wait in a queue.
- Bought pages. You can buy 10 to 200 pages at a time, at $0.90 a page. Bought pages never expire.
- Plans. Plus is $19 a month for 100 pages; Pro is $59 a month for 500 pages. A plan's pages are for the month you paid for and lapse at its end. The next section explains renewal and cancelling.
Pages are used in this order: your plan's pages, then your free pages, then the pages you bought.
When you start a translation, the pages it needs are set aside from your balance. They are used when the translation is delivered. If it isn't delivered, they come back, as set out below.
You can upload a PDF of up to 20 pages and 50 MB. To translate a longer document, split it into PDFs within these limits and upload each one.
Prices are in US dollars. Tax is calculated at checkout based on where you are.
Paddle processes all payments as our merchant of record. Paddle sells you the pages or the plan, takes the payment, collects the tax and sends your receipt, and Paddle's buyer terms also apply to the purchase.
We may change prices. A new price applies to purchases made after the change. For a plan, we email you at least 14 days before a new price applies to your renewal.
5. Plans and automatic renewal
A plan renews automatically every month until you cancel it. At the start of each month, Paddle charges the plan's price to your saved payment method, and the month's pages are added once the payment goes through. Pages left at the end of a month lapse; they don't carry over.
To cancel your plan:
- Sign in and open the Account page.
- Under your plan, choose Cancel plan, then confirm.
You can also cancel in Paddle's buyer portal. Open it with Payment method and invoices on the Account page, or with the link in the subscription confirmation email Paddle sends you.
After you cancel, you aren't charged again. Your plan and its pages stay until the end of the month you have paid for, and that month is not refunded. Until it ends, you can choose Keep my plan to undo the cancellation.
Moving from Plus to Pro takes effect at once: Paddle charges the price difference for the days left in this month, and the extra pages are added in the same share and lapse when this month ends. If this month was already paid at Pro, moving back up to it is not charged and adds no pages. Moving from Pro to Plus takes effect at your next renewal, and you keep this month's pages.
If a renewal payment fails, the new month's pages are added once the payment goes through. Until then, your free pages and any pages you bought still work.
Deleting your account cancels your plan at once. See Closing your account below.
6. When a translation isn't delivered
A translation we don't deliver costs you no pages. The pages set aside for it come back to your balance in these cases:
- It fails. We couldn't deliver a translated PDF that opens and has all its pages.
- It stops and needs one of us. We look at it within one business day, then either deliver it or return its pages and tell you why. Until then its pages stay set aside.
- The file is already in the language you chose. Its pages come back at once, and you can choose another language.
- You stop it. You cancel a translation before it starts, or delete a document whose pages are still set aside.
Pages come back as the kind they were. A plan's pages go back to their month; if that month has ended, they come back as bought pages, which never expire.
We return pages, not money.
7. Refunds
Bought pages and plan fees are not refunded, except where the law gives you a right to a refund. Our Refund Policy explains how those rights are handled through Paddle and what happens to your pages when a payment is refunded or charged back.
8. Your documents
You keep all rights to the documents you upload and to their translations. We claim no ownership of them.
Upload only documents you have the right to share with us and to have translated.
You allow us to store, process and copy your documents, and to send them to the service providers named in our Privacy Policy, as far as needed to translate, review and deliver them, to help you with them, and to test changes to LangTo.
Your documents and their translations are not used to train AI models. They are deleted 30 days after upload, and you can delete them sooner. The Privacy Policy gives the details.
9. Acceptable use
You agree not to:
- upload files containing malware or anything meant to harm us or others;
- use LangTo for content that is illegal where you are;
- create more than one account to get more free pages;
- get around page limits, rate limits or other technical limits;
- access LangTo with bots or scrapers without our written permission;
- try to reverse-engineer LangTo;
- offer LangTo itself to others as a hosted translation service (translating documents for your own clients is fine);
- interfere with or disrupt LangTo or the systems it runs on.
We may suspend or close an account that breaks these rules.
10. Our service
LangTo's software, design and brand belong to us. These terms let you use LangTo as described here and give you no other rights in it.
11. Translation quality
LangTo uses AI models. A translation can contain errors or omissions, or wording that doesn't suit your purpose, even after the second review. Places that only the original can settle, such as a figure that is hard to read, are marked for you to check.
Review a translation before you rely on it, especially for legal, medical, financial or immigration matters, and correct it where needed. You are responsible for how you use it.
We don't guarantee that a translation is accurate, complete or fit for a particular purpose, or that a recipient will accept it.
12. Limitation of liability
We work to keep LangTo available, but it may be unavailable at times for maintenance, updates or reasons outside our control.
To the extent the law allows:
- LangTo is provided "as is" and "as available", without warranties of any kind, express or implied.
- We are not liable for indirect, incidental, special, consequential or punitive damages, including lost profits, data or business.
- Our total liability for all claims about LangTo is limited to the amount you paid us in the 12 months before the claim.
Nothing in these terms limits consumer rights that the law doesn't allow to be limited.
13. Closing your account
You can delete your account at any time on the Account page. Deleting it:
- cancels your plan at once, if you have one; the rest of that month's pages are lost and the month is not refunded;
- removes the pages you bought and haven't used, without a refund;
- deletes your documents, their translations and your account details.
We keep payment records where tax or accounting law requires it.
We may suspend or close your account without notice if you break these terms, if the law requires it, or if we reasonably believe it is being used for fraud.
14. Disputes
If you have a problem with LangTo, write to contact@langto.ai first, and we will try to resolve it with you. If we can't within a month, either of us may pursue the remedies available under the applicable law.
15. Changes to these terms
We may update these terms. If a change matters to you, we email you and post the new terms here at least 14 days before they take effect. If you don't accept them, stop using LangTo before then.
16. Language
These terms are written in English. Versions in other languages are translations; if they differ, the English version applies.
17. Contact
Questions about these terms: contact@langto.ai.