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Skill · Document Processing

PDF Form Filler

Fill out PDF forms programmatically and extract form data

Claude Office SkillsLicense: MITAdded Sep 29, 2026
Use it in my AI

How to use it

  1. Start your plan and connect your AI once
  2. Ask for the task in your own words, or say it directly:
Use the PDF Form Filler skill to help me with this.

Without a connection: copy the SKILL.md below into your AI's project instructions.

SKILL.md

PDF Form Filler

Fill out PDF forms automatically and extract data from completed forms.

Overview

This skill helps you:

  • Fill PDF forms with provided data
  • Extract data from filled forms
  • Batch fill multiple forms
  • Validate form data
  • Create form-filling templates

How to Use

Fill a Form

"Fill this PDF form with the following data:
- Name: John Smith
- Date: 2026-01-29
- Amount: $1,500"

Extract Form Data

"Extract all form field values from this PDF"
"What data is filled in this form?"

Batch Fill

"Fill 50 copies of this form using data from the spreadsheet"
"Generate forms for each row in this CSV"

Form Field Types

Supported Fields

Field TypeDescriptionFill Method
Text FieldSingle/multi-line textDirect text entry
CheckboxYes/No selectionCheck/uncheck
Radio ButtonOne of many optionsSelect option
DropdownList selectionChoose value
Date FieldDate pickerDate value
SignatureDigital signatureSignature image/certificate
Combo BoxDropdown with text entrySelect or type

Field Identification

## Form Fields: [Form Name]

### Field Map
| Field Name | Type | Required | Page | Notes |
|------------|------|----------|------|-------|
| applicant_name | Text | Yes | 1 | Max 50 chars |
| birth_date | Date | Yes | 1 | MM/DD/YYYY |
| gender | Radio | Yes | 1 | M/F/Other |
| employed | Checkbox | No | 1 | Check if yes |
| state | Dropdown | Yes | 2 | US states |
| signature | Signature | Yes | 3 | Digital sig |

Fill Templates

Data Mapping Template

## Form Fill Template: [Form Name]

### Form Info
- **File**: application_form.pdf
- **Total Fields**: 25
- **Required Fields**: 15

### Field Mappings

Personal Information

applicant_name: "${firstName} ${lastName}" date_of_birth: "${birthDate}" ssn_last_four: "${ssnLast4}" phone: "${phone}" email: "${email}"

Address

street_address: "${address.street}" city: "${address.city}" state: "${address.state}" zip_code: "${address.zip}"

Employment

currently_employed: ${isEmployed} # checkbox employer_name: "${employer.name}" job_title: "${employer.title}"

Selections

payment_method: "${paymentMethod}" # dropdown agree_terms: true # checkbox


### Sample Data

{ "firstName": "John", "lastName": "Smith", "birthDate": "1990-05-15", "phone": "555-123-4567", "email": "john.smith@email.com", "address": { "street": "123 Main St", "city": "New York", "state": "NY", "zip": "10001" }, "isEmployed": true, "employer": { "name": "Acme Corp", "title": "Manager" }, "paymentMethod": "Direct Deposit" }

Output Formats

Fill Result Report

## Form Fill Result

### Summary
| Status | Value |
|--------|-------|
| **Form** | application_form.pdf |
| **Fields Filled** | 23/25 |
| **Errors** | 2 |
| **Output** | filled_application.pdf |

### Filled Fields
| Field | Value | Status |
|-------|-------|--------|
| applicant_name | John Smith | ✅ |
| date_of_birth | 05/15/1990 | ✅ |
| phone | 555-123-4567 | ✅ |
| state | NY | ✅ |
| payment_method | Direct Deposit | ✅ |

### Errors/Warnings
| Field | Issue | Suggestion |
|-------|-------|------------|
| ssn | Field not found | Check field name |
| signature | Requires certificate | Add signature manually |

### Validation
- ✅ All required fields filled
- ✅ Date formats correct
- ⚠️ Signature field needs manual completion

Extracted Data Report

## Form Data Extraction

### Source: completed_form.pdf

### Extracted Values

{ "form_title": "Employment Application", "submission_date": "2026-01-29", "fields": { "applicant_name": "Jane Doe", "date_of_birth": "1985-03-20", "email": "jane.doe@email.com", "phone": "555-987-6543", "address": "456 Oak Ave, Chicago, IL 60601", "position_applied": "Senior Developer", "salary_expectation": "$120,000", "available_start": "2026-03-01", "references_provided": true } }


### Field Statistics
| Metric | Value |
|--------|-------|
| Total fields | 30 |
| Filled fields | 28 |
| Empty fields | 2 |
| Extraction confidence | 98% |

Batch Processing

Batch Fill Job

## Batch Form Fill

### Configuration
- **Template Form**: w9_form.pdf
- **Data Source**: vendors.csv
- **Records**: 150
- **Output Folder**: /filled_w9s/

### Data Preview
| Row | Name | TIN | Address |
|-----|------|-----|---------|
| 1 | Acme Corp | XX-XXX1234 | 123 Main St |
| 2 | Beta LLC | XX-XXX5678 | 456 Oak Ave |
| ... | ... | ... | ... |

### Progress
| Status | Count | % |
|--------|-------|---|
| ✅ Completed | 145 | 97% |
| ⚠️ Warnings | 3 | 2% |
| ❌ Errors | 2 | 1% |

### Errors
| Row | Issue |
|-----|-------|
| 47 | Invalid TIN format |
| 89 | Missing required: Address |

### Output Files
- w9_acme_corp.pdf
- w9_beta_llc.pdf
- ...

Form Validation

Validation Rules

## Form Validation Rules

### Field Validations
| Field | Rule | Error Message |
|-------|------|---------------|
| email | Valid email format | "Invalid email address" |
| phone | 10 digits | "Phone must be 10 digits" |
| ssn | XXX-XX-XXXX format | "Invalid SSN format" |
| date | MM/DD/YYYY | "Use MM/DD/YYYY format" |
| zip | 5 or 9 digits | "Invalid ZIP code" |
| amount | Numeric, > 0 | "Enter positive number" |

### Cross-Field Validations
| Rule | Fields | Condition |
|------|--------|-----------|
| Conditional required | employer_name | Required if employed = true |
| Date range | end_date | Must be after start_date |
| Sum check | item_totals | Must equal grand_total |

Validation Report

## Pre-Fill Validation

### Data Validation Results
| Field | Value | Valid | Issue |
|-------|-------|-------|-------|
| email | john@email | ❌ | Missing domain |
| phone | 555-1234 | ❌ | Only 7 digits |
| date | 2026-01-29 | ✅ | - |
| zip | 10001 | ✅ | - |

### Summary
- ✅ Valid: 18 fields
- ❌ Invalid: 2 fields
- ⚠️ Warnings: 3 fields

### Recommendations
1. Fix email format: add domain (e.g., @company.com)
2. Complete phone number with area code

Common Form Types

Government Forms

FormPurposeKey Fields
W-9Tax identificationTIN, name, address
I-9Employment eligibilityID info, citizenship
W-4WithholdingAllowances, status
1099Contractor incomeIncome, payer info

Business Forms

FormPurposeKey Fields
NDAConfidentialityParties, terms, dates
InvoiceBillingItems, amounts, terms
POPurchase orderItems, quantities, vendor
ApplicationVariousPersonal info, history

Tool Recommendations

Desktop Software

  • Adobe Acrobat Pro: Full form features
  • Foxit PDF Editor: Good form support
  • PDFescape: Free online option
  • JotForm: Form creation and filling

Programming Libraries

  • pdf-lib (JavaScript): Fill and create forms
  • PyPDF2 (Python): Basic form filling
  • iText (Java/.NET): Enterprise forms
  • PDFBox (Java): Apache project

Automation Tools

  • Adobe Acrobat Actions: Batch processing
  • Power Automate: Microsoft integration
  • Zapier + PDF.co: Cloud automation

Limitations

  • Cannot execute actual form filling (provides guidance)
  • Digital signatures require proper certificates
  • Some secured PDFs prevent form filling
  • Complex calculations may not auto-update
  • Flattened forms cannot be edited
  • Field names must match exactly