Provider
DuoSubs is provided by Sascha Heyer, hello@duosubs.com (see the legal notice). These terms apply to the DuoSubs Chrome extension, the website duosubs.com and DuoSubs Pro.
What DuoSubs is
DuoSubs shows two subtitle lines on YouTube videos, using the subtitles YouTube provides for a video. Whether a video has subtitles, and how good they are, depends on YouTube and the video’s creator. YouTube may change its website at any time; we fix DuoSubs as fast as we can when that breaks something, but we can’t promise that it works on every video at every moment.
Free
Two subtitle lines, keyboard shortcuts, pause on hover and all display settings are free, without an account. A free account adds 5 explanations of words or lines per day (UTC). We may change what Free includes; we tell you on this website beforehand.
Pro
Pro adds explanations without the daily limit of the free plan, your saved word list and the Anki export. To keep the service affordable, Pro has a fair-use limit of 200 explanations per day, far above normal learning. Pro is available as a monthly or yearly subscription or as a one-time Lifetime purchase. Lifetime means for as long as DuoSubs is offered.
Explanations are written by an AI model. They are usually right, but they can be wrong; check what matters to you.
Prices and payment
Prices are shown on the pricing page in US dollars and include VAT where it applies. Payment is handled by Stripe. Subscriptions renew automatically at the end of each period, monthly or yearly, until you cancel. We tell you by email at least 30 days before any price change for an existing subscription, and you can cancel before it applies.
Cancellation and withdrawal
You can cancel a subscription at any time in your account; it ends at the end of the current period, and you keep Pro until then. As a consumer you have a 14-day right of withdrawal, described on the refunds page.
Fair use
Don’t use DuoSubs to scrape subtitles, to resell explanations, or to overload our service with automated requests. We may limit or close accounts that do.
Liability
We are liable without limitation for intent and gross negligence, for injury to life, body or health, and under the Product Liability Act. For slight negligence we are liable only for breaches of essential contractual obligations, limited to the damage typical and foreseeable for this kind of contract.
Law
German law applies, excluding the UN Convention on Contracts for the International Sale of Goods. If you are a consumer, this choice of law does not take away the protection of the mandatory consumer law of the country where you live.
Updated: 11 November 2026