Legally secure, bilingual documents.
Legally secure, bilingual documents — whenever two parties don't share a language: rental contracts, powers of attorney, purchase agreements and more, built from simple questions instead of legalese.
Bilingual
Legally secure
Simple & fastResidential tenancy agreement
§ 1 Der Vermieter überlässt dem Mieter die Wohnung zum vorübergehenden Gebrauch (§ 549 Abs. 2 Nr. 1 BGB).
§ 1 The landlord lets the flat to the tenant for temporary use (§ 549(2) No. 1 German Civil Code).
§ 2 Die Kaution beträgt höchstens drei Nettokaltmieten (§ 551 BGB) und wird getrennt angelegt.
§ 2 The deposit is capped at three months' net rent (§ 551 German Civil Code) and is held separately.
§ 12 Maßgeblich ist die deutsche Fassung; die Übersetzung dient dem Verständnis.
§ 12 The German version prevails; the translation is provided for understanding.
In ~5 minutes
to a signature-ready PDF
€14.90
one-off per document · blank template €9.90 · preview without sign-up
Instead of several hundred €
for a lawyer plus certified translation
Why DUOLEXX instead of just asking an AI?
An AI writes text fast. That doesn't make it legally sound, bilingual and ready to sign. That's exactly the difference.
Grounded in local law
Every document follows the law of the chosen country — researched clauses, not a generic template from the web.
Authoritative language + translation
The binding version in the legal language, alongside an understandable translation. A chat rarely delivers both, soundly, at once.
Verifiable signature
Two-party signature with a SHA-256 integrity proof — provable that both signed the same wording.
Finished, not just text
PDF, signature, archive and share link in one flow — an AI chat only hands back raw text.
Choose a template
Choose a region and document type — every template follows local law.
Answer questions
Simple questions instead of legalese — your document builds live in two languages.
Unlock the PDF
Pay once and you're done: download, archive and share your PDF.
Who is DUOLEXX for?
From a single document to a flat rate with API — depending on how often and how you need bilingual documents.
Landlords & property managers
Leases in each tenant's language — at scale, signed, managed.
HR & employers
Employment & freelance contracts, NDAs, onboarding for foreign-language teams.
Brokers, relocation & law firms
Recurring documents for clients — with white-label and API.
Developers & AI platforms
Embed document generation via API & MCP into your product or your AI.
Documents & regions
Pick your need — each entry leads straight to the right document.
Housing
Move in, rent, sublet, terminate — with contracts both sides actually understand.
Authorities & representation
Someone acts for you — at offices, the post or in contracts — while you're not around.
Buying & selling
Buy or sell second-hand privately without the language barrier becoming a risk.
Work & freelance
Contracts for remote work and freelancing — also as proof for visa applications.
Business & agreements
Country-neutral agreements between two parties — usable worldwide.
Regions & legal systems
For teams, developers & AI
If you need documents regularly or programmatically, use DUOLEXX as a tool — not a one-off purchase.
Pro — unlimited & for teams
Unlimited documents, white-label and an admin dashboard instead of one-off purchases.
See Pro →API as a feature
Generate documents programmatically from your own systems — versioned, with API keys.
See the API →