How to write a lease, NDA or contract with AI and get a real PDF back

You need a lease extension by tonight, an NDA before Monday's call, a rent increase notice that follows the rules, or a freelance contract for a new client. A template found online is someone else's document with someone else's assumptions; a lawyer is the right call for high stakes and the wrong one for a one-page notice. Between those sits drafting with AI, which is fast and useful when you know what to ask for and what to check. This guide shows how Create with AI in blupdf works, from the first sentence to the signed PDF.

What Create with AI produces

Not a chat answer to copy into Word, but a document: real PDF pages with a title, the parties, numbered clauses, tables where the content calls for them, blanks where your facts go, and signature lines at the end. blupdf picks a layout that suits the kind of document, so a notice looks like a notice and a contract like a contract. The draft can be revised in the same chat, its blanks filled from a list, and then finished in the editor like any uploaded file.

Step by step

1. 1

   Describe it in Studio

   Open Studio and type into the box: "Extend my tenant's lease by 12 months at the same rent, with signature lines for both of us." Or choose Create with AI under the box and start from an example.

2. 2

   Wait about 30 seconds

   The document is drawn beside the chat as it is written. The first draft costs 300 credits.

3. 3

   Revise in plain language

   "Add a clause about pets." "Make the notice period 60 days." "Shorten the introduction." Each revision costs 100 credits and updates the whole document. A question ("is a deposit clause normal here?") is answered in the chat without changing anything.

4. 4

   Fill in the blanks

   Switch to the Fill in tab. Every blank the draft left is listed with its label: Tenant, Monthly rent, Start date. Type the values and they are printed into the document; they are kept with the draft, so you can come back later.

5. 5

   Finish in the editor

   Choose Finish in editor. The draft, with your values, becomes a PDF document parsed into blocks (50 credits per page). Retype anything, place a signature, ask blupdf AI for last changes, and download as PDF, DOCX, JPG or PNG.

What to put in the first sentence

The draft is only as specific as the description. Say what matters:

• The parties and their roles. "Between me as landlord and my tenant" tells the draft who signs and who is addressed.
• The amounts and dates. Rent, deposit, term, start date, notice period. Anything you leave out becomes a blank to fill in, which is fine, or a standard clause, which you should read.
• The jurisdiction. "Under California law" or "for a flat in Berlin" changes wording and defaults.
• The unusual. A pet, a home office, a break clause, a non-solicitation period, payment in instalments. Standard drafts do not include what you did not mention.

Two sentences are usually enough. A longer brief is fine; a vague one produces a generic document that needs more revision rounds.

Good prompts for common documents

• Lease extension: "Extend the lease at 12 Market Street by 12 months from 1 October 2026 at $1,800 a month, everything else unchanged, signature lines for landlord and tenant."
• NDA: "A mutual non-disclosure agreement between two companies exploring a software partnership, two-year confidentiality period, governed by Delaware law."
• Freelance contract: "A service agreement for a freelance designer, fixed fee of $4,000 paid half up front and half on delivery, three revision rounds, the client owns the final files, either side may end it with 14 days' notice."
• Rent increase notice: "A notice to my tenant that rent increases from $1,500 to $1,575 effective 1 December 2026, with 60 days' notice, polite and formal."

What to check before you sign

Create with AI writes well-structured documents, and it is a language model, not a lawyer. Before anyone signs:

1. Read every clause once. A clause that reads well may not be the one you need, and a default (a deposit equal to one month, a 30-day notice period) may not match your situation or your local rules.
2. Check the jurisdiction-specific parts: notice periods, deposit limits, cooling-off rights and required disclosures vary by country and state.
3. Confirm the blanks are all filled. The Fill in tab counts the open ones.
4. For anything with real stakes, have it reviewed by a professional. The draft gives them a clean starting point, which is most of the cost of a review.

Signing and sending

Once the document is in the editor, choose Signature, draw or type your signature and click the signature line; the other party can do the same on their copy, or sign on paper. Download as PDF and send it. If you need a Word file for the other side's lawyer, download DOCX as well; downloads are free.

Cost

A first draft costs 300 credits and each revision 100. Typing values into blanks is free while drafting. Finish in editor parses the pages at 50 credits each, and then the editor's rates apply: 1 credit per character of new text and 100 per blupdf AI request. A three-page lease drafted, revised twice, finished and signed costs about 300 + 200 + 150 = 650 credits. Every account starts with 1,000, no card required.

FAQ

Can I start from a PDF I already have instead?

Yes, and that is the better path when the document exists: drop the PDF into Studio and it opens in the editor, where the Fill in tab lists its blanks and blupdf AI makes changes. Create with AI is for documents that do not exist yet.

Where do my drafts live?

Under AI drafts on the Documents page. Open one to continue revising; each Finish in editor makes a new document from it.

Is the draft legal advice?

No. It is a well-formed starting document. Review it, and have anything important checked by a professional.

The reference is Create a document with AI; the editor side is covered in Editing with blupdf AI and Signing a PDF.