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 authorized client row becomes one PDF
| Client ID | Entity name | Tax class |
|---|---|---|
| CLI-1041 | Northwind LLC | Partnership |
| CLI-1042 | Contoso Inc | S Corporation |
| CLI-1043 | Fabrikam Studio | Sole proprietor |
Upload the recurring client form
Use the current official or firm-specific PDF and review the detected fields before repeating it.
Import a minimal client spreadsheet
Use one authorized client per row and include only the columns needed by the target form.
Verify every client draft
Review source values, field placement, form version, and missing data before export or signature.
Where it fits
Built for the same form across many authorized client records.
JustFill is useful when a practice already has structured client data but still needs to prepare an existing government, client, bank, or firm-specific PDF for every record.
Simple pricing
Start with synthetic sample rows, then validate one real client workflow.
No setup call is required. Starter supports 25 PDFs per batch and 125 clean output pages per month; Pro raises the batch size to 100 records.
Starter
Recommended first workflow
- Up to 25 PDFs per batch
- 125 clean output pages per month
- AI field detection for 25 new pages per month
- Clean, watermark-free ZIP exports
- CSV and XLSX spreadsheet imports
- Review every record before export
- Reusable reviewed PDF templates
Paid workflow
Keep the source data in your accounting system and automate only the PDF layer.
A reviewed form template and stable export headers reduce repetitive entry while preserving the practice’s existing review, signature, and filing controls.
Reviewed form geometry
Save the field layout for the exact form version after a human checks it.
Deterministic spreadsheet mapping
Use matching column names to avoid unnecessary AI mapping on recurring batches.
Client-by-client review
Inspect every draft and download only the records ready for the next controlled step.
Guardrails
Draft preparation with human review.
Clear boundaries
JustFill does not provide tax, accounting, or legal advice; determine filing positions; validate identifiers; sign forms; or file documents. Use current official instructions and review every draft.
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.
Frequently asked questions
Does JustFill determine the correct tax treatment or form answers?
No. It places values supplied by your practice into visible PDF fields. A qualified professional remains responsible for form selection, interpretation, accuracy, signatures, and filing.
Does JustFill submit forms to the IRS or another agency?
No. The browser workflow returns reviewable PDFs and a ZIP. Submission stays in your existing process.
Can we reuse a form next quarter or next tax season?
Yes, if the PDF is unchanged. When the issuing body publishes a new version, upload and review that version as a new template.
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.