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FDFMerge review

#43 of 45 in PDF Creation Software

A focused self-hosted tool for batch-filling PDF forms from FDF or XFDF data.

5.2/10Editor score
Visit Appligent
FDFMerge5.2 Visit Appligent

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

FDFMerge is server-based command-line software for filling PDF form templates with FDF or XFDF data. It is aimed at teams processing forms in batches, including workflows in banking and government. The tool can apply one data file to multiple forms, making it relevant when repeated form completion is the central task. It runs on Windows and Linux and is self-hosted, so it suits organizations that want to run the processing software in their own environment rather than use a hosted PDF service.

Its feature set centers on control over the finished form. Users can flatten every form field or select individual fields, customize text, font, spacing, borders, and backgrounds through FormInfo files, and place PDF pages or JPEG and TIFF images into fields. Output PDFs can also be encrypted and given document permissions. Command Collections support processing many forms in one run, while command-line operation allows teams to connect the workflow to scripts. These capabilities make FDFMerge a better fit for structured, repeatable form-filling jobs than for general-purpose PDF creation or editing.

The published plan is named FDFMerge and highlights full-featured form handling, partial form flattening, and dynamic field customization; no free plan is listed. Appligent describes a free trial, but does not specify its terms. Email is the stated support channel. The product details do not specify API access, and integrations are not established, so teams needing a ready-made connector ecosystem or an API-driven service should consider alternatives. Choose FDFMerge when batch data merging and field-level output control matter more than a hosted interface or broad integration options.

FDFMerge pros and cons

  • Where it wins
    • Merges one FDF or XFDF data file across multiple forms
    • Supports selective field flattening and detailed field customization
    • Runs from the command line and supports scripted batch workflows
  • Where it doesn't
    • Requires self-hosted deployment on Windows or Linux
    • No API access or verified integrations
    • The listed plan highlights do not describe multiple tiers

FDFMerge fact sheet, pricing and score →

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