22-second walkthrough
One PDF. Five spreadsheet rows. One ZIP.
A real production workflow with a synthetic vendor form and a five-row Excel workbook: match all nine fields, review every PDF, and export one ZIP.
- 1Review nine PDF fields once
- 2Match 9/9 Excel headers
- 3Approve five and export ZIP
PDF mail merge, without Word
How to fill multiple PDF forms from Excel
Keep the original PDF layout. Put column names in the first spreadsheet row and one customer, employee, vendor, or case in each row below it. JustFill creates a separate PDF for every selected row.
- 1
Upload the original PDF
Use an AcroForm, a flat PDF, or a scan. JustFill detects the fields before the merge.
- 2
Import XLSX or CSV
Dates, leading zeros, percentages, booleans, and spreadsheet headers are preserved for mapping.
- 3
Check the column mapping
Matching headers map directly. Ambiguous columns can use AI-assisted mapping.
- 4
Review and export
Approve the records you want and download individual filled PDFs in one ZIP.
Sample input
One unit row becomes one tenant-ready lease renewal or notice PDF
| Property & Unit | Tenant(s) & Lease Dates | Current vs. Renewal Rent |
|---|---|---|
| Oak Creek Commons — Unit 104B | Hannah & Marcus Brooks (12/01/2026–11/30/2027) | $1,850.00 → $1,915.00/mo |
| Oak Creek Commons — Unit 212A | Daniel K. Cho (12/01/2026–11/30/2027) | $1,620.00 → $1,675.00/mo |
| Magnolia Terrace — Unit 305 | Sofia & Lucas Ramirez (12/01/2026–11/30/2027) | $2,190.00 → $2,260.00/mo |
Property & Unit
Oak Creek Commons — Unit 104B
Tenant(s) & Lease Dates
Hannah & Marcus Brooks (12/01/2026–11/30/2027)
Current vs. Renewal Rent
$1,850.00 → $1,915.00/mo
Click any spreadsheet row above to preview its generated PDF. All 3/3 columns auto-matched by AI.
Upload your lease renewal or notice PDF
Use your state apartment association form, owner-specific lease addendum, rent adjustment notice, or move-out inspection PDF.
Import your rent roll CSV or XLSX
Export expiring leases from AppFolio, Buildium, Yardi, Rent Manager, or Excel and map unit number, tenant names, dates, and rent amounts.
Review every unit and export ZIP
Step through the generated notices on the PDF canvas, adjust concessions or pet fees inline, and download all unit PDFs in one ZIP.
Where it fits
Built for monthly lease renewal waves, rent roll updates, and building-wide notices.
When 30 to 500 leases come up for renewal next month or an entire property needs updated addenda, parking permits, or state-mandated notices, JustFill populates your exact owner-approved PDF template from your rent-roll spreadsheet without mail-merge formatting headaches.
Simple pricing
Test five synthetic unit rows free before running next month’s renewal wave.
Download the Lease Renewal CSV template or try the 5-row guided sample. Your first AI column match is free; Starter ($19/mo), Pro ($49/mo), and Business ($99/mo) support 25, 100, and 500 units per batch.
Running larger spreadsheet batches? Get Pro — $49/month for up to 100 rows per batch (or Business at $99/month for up to 500 rows).
Starter
Recommended first workflow
- AI field detection for 250 new pages per month
- Reusable templates — refills use no detection pages
- Up to 25 PDFs per batch
- 125 clean output pages per month
- Clean, watermark-free ZIP exports
- CSV and XLSX spreadsheet imports
- Review every record before export
Paid workflow
Standardize monthly renewal batches across every property in your portfolio.
Save your reviewed lease renewal or notice layout once. Each month, export the 60-day or 90-day expiring lease report to CSV, drop it into JustFill, and produce the entire property packet in minutes.
Preserves exact legal & association layouts
Keep your exact PDF pagination, checkboxes, and signature blocks intact without converting forms to Word.
Inline rent & concession adjustments
Tweak a single unit’s renewal offer rate, concession amount, or response deadline directly in the browser table before exporting.
ZIP export or Shareable E-Sign Links
Download individual unit PDFs for portal upload/certified mail, or send public fillable e-sign links to tenants.
Guardrails
Draft preparation with human review.
Clear boundaries
JustFill prepares PDF drafts from rent-roll and tenant data your management team provides. It does not calculate permissible rent increases, verify statutory notice periods under state or local landlord-tenant law, or serve notices to tenants.
Beyond manual uploads
Run the same PDF workflow from an AI agent or n8n.
The browser flow is the fastest way to validate a spreadsheet and PDF. Once the mapping works, the same JustFill account can expose PDF detection, filling, and saved templates through the hosted MCP endpoint.
ChatGPT, Claude and MCP
Give an agent a PDF, inspect detected fields, fill it, and save the reviewed layout for repeat use.
n8n automation
Trigger fills from a webhook, spreadsheet, CRM, or database and send the result to your next workflow node.
PDF Mail Merge Software
Browser-based PDF mail merge software to batch fill fillable, flat, and scanned PDFs without Acrobat plug-ins or VBA macros.
Fill Applications for Clients
Prepare recurring official forms, permits, and intake packets across client rosters from one structured spreadsheet.
Frequently asked questions
Can we use CSV exports from AppFolio, Buildium, Yardi, or Rent Manager?
Yes. Export your expiring lease report or rent roll as a standard CSV or XLSX file, upload it to JustFill, and map the columns to your PDF template once.
Does JustFill work with flat or scanned landlord/HOA PDFs that do not have form fields?
Yes. AI field detection finds blank lines, tables, and checkboxes on flat or scanned PDFs so you can calibrate the template once and reuse it every month.
Can we also collect tenant signatures online for single renewals or rental applications?
Yes. On Starter, Pro, and Business plans, any saved template can be shared via a public /f/<token> link so a tenant or applicant can fill and e-sign from their phone or computer.
Does it work with scanned or flat PDFs?
Yes. JustFill detects field locations in fillable, flat, and scanned PDFs before mapping spreadsheet columns.
Does each spreadsheet row create a separate PDF?
Yes. The first row contains the Excel or CSV column names. Every selected data row becomes one reviewable PDF in the exported ZIP.
Is this the same as Word mail merge?
It uses the same one-row-per-document idea, but fills your existing PDF directly. You do not need to recreate the form in Word or convert the PDF first.
Can I review results before downloading?
Yes. Each spreadsheet row becomes a reviewable record. Approve the records you want before creating the ZIP.
Does JustFill email the generated PDFs?
Not in the current self-service batch. It creates individual PDFs and packages the approved files in a ZIP for download.
What happens to uploaded documents?
Transfers use TLS. Rendered page images are deleted within 7 days and source documents within 30 days unless you save the PDF as a reusable template.