How does the tool match JSON data to the PDF form fields?

The tool matches the keys in your JSON objects directly to the internal field names (AcroForm fields) defined in your PDF template.

What is the difference between ZIP and Merged output modes?

ZIP mode generates a separate PDF file for each JSON record and packages them into a ZIP archive, while Merged mode combines all filled PDFs into a single document.

What does the 'Flatten Each' option do?

Flattening locks the form fields, converting the interactive form inputs into static text so they cannot be edited by the recipient.

Is my data uploaded to a server?

No, all processing is performed locally in your browser using JavaScript, ensuring your template and data remain private.

How are the individual files named in the ZIP output?

You can specify a field from your JSON records (using the Name Field option) to dynamically name each generated PDF file.

Elysia Tools

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PDF Tools

PDF Form Fill Batch

Fill one PDF form template with an array of records and output one filled PDF per record (ZIP) or a merged PDF

Details

What this tool helps you do

Fill ONE template PDF with MANY records in a single operation. Each record fills a fresh copy of the template; results are returned as a ZIP (one PDF per record) or a merged PDF. Companion to the single-file PDF form filler. Pure-JS via pdf-lib + JSZip.

Execution

Run this tool

Fill in the form, run the tool, and review the result in one place.

Prepared example runs

Click an example to fill the form automatically. File inputs still need an upload.

2 examples

Mail-merge certificates into a ZIP

Fills a certificate template with 3 records and returns a ZIP with one PDF per person.

{
  "type": "file",
  "filePath": "/public/samples/pdf/pdf-form-fill-batch-example1.zip"
}

Merge invoices into one PDF

Fills an invoice template with multiple records and returns a single merged PDF.

{
  "type": "file",
  "filePath": "/public/samples/pdf/pdf-form-fill-batch-example2.pdf"
}

Inputs

Set the required fields, then run the tool.

5 options

FilesUpload source files for this workflow.1

Template PDFfileRequired

Single file max size: 50 MBSupported types: application/pdf

ContentPaste or type the main input values.2

Records JSONtextareaRequiredJSON array of objects. Each object fills one copy of the template.Name FieldtextOptionalRecord field used to name each output PDF in ZIP mode

SettingsAdjust formats, ranges, numbers, and modes.1

Output ModeselectOptional

TogglesEnable or disable optional behavior.1

Flatten EachcheckboxOptionalEnabled when checkedFlatten each filled form so it is non-editable

Result

Ready for a run

Run the tool to preview files, text, structured data, or streamed output here.

Samples

Examples that match this tool

Continue with connected tools and hubs

{ "templatePdf": "certificate-template.pdf", "recordsJson": "[{\"name\":\"Alice Zhang\",\"course\":\"Advanced TypeScript\",\"date\":\"2026-06-16\"},{\"name\":\"Bob Chen\",\"course\":\"Go Fundamentals\",\"date\":\"2026-06-16\"}]", "outputMode": "zip", "nameField": "name", "flattenEach": true }

PDF Form Fill Batch

What this tool helps you do

Run this tool

Prepared example runs

Inputs

Result

Examples that match this tool

Continue with connected tools and hubs

Prepared example runs

Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Batch Certificate Generation

2. Merged Invoice Generation

FAQ

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