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Data Processing

XML File Merger

· Last updated：2025-09-30

Merge multiple XML files into a single file with options for handling root elements and namespaces

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Written by the Elysia Tools team
Files143
Multiple142
Data Processing130
XML18
Single File6

Tool usage guide

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

Key facts

Category
Data Processing
Input types
file, select
Output type
file
Sample coverage
4
API ready
Yes

Overview

The XML File Merger is a streamlined utility designed to combine multiple XML documents into a single, cohesive file while providing granular control over root elements, namespaces, and output formatting.

When to use

  • Consolidating fragmented data exports from multiple system logs or database dumps.
  • Aggregating configuration files into a single master document for easier management.
  • Preparing batch XML data for ingestion into applications that require a unified input source.

How it works

  1. 1Upload your XML files using the file selector (up to 5 files).
  2. 2Select a merge strategy to define how root elements and child nodes are combined.
  3. 3Configure advanced settings like namespace preservation and output formatting.
  4. 4Download the merged XML file once the processing is complete.

Use cases

  • Merging daily server log exports into a single weekly report file.
  • Combining localized language XML files into one master translation document.
  • Aggregating individual user profile exports into a single dataset for migration.

Examples

1. Consolidating System Logs

System Administrator

Background

The admin has 5 separate XML log files generated by different server nodes that need to be analyzed together.

Problem

Manually copying and pasting XML content is error-prone and risks breaking the document structure.

How to use

Upload the 5 log files, select 'Combine Root' to keep them distinct, and choose 'Formatted XML' for readability.

mergeStrategy: combine-root, handleRootElements: wrap, preserveNamespaces: yes, outputFormat: pretty

Outcome

A single, well-formatted XML file containing all log entries wrapped in a parent container for easy parsing.

2. Merging Configuration Files

Software Developer

Background

A project requires merging multiple module-specific configuration XMLs into one main application config.

Problem

The developer needs to merge children nodes into a single root without creating redundant root tags.

How to use

Upload the configuration files and select 'Merge Children' to append all settings under the primary root.

FAQ

How many files can I merge at once?

You can upload and merge up to 5 XML files in a single session.

What is the difference between 'Combine Root' and 'Merge Children'?

Combine Root creates a new parent element containing all source roots, while Merge Children appends the contents of subsequent files under the first file's root element.

Can I preserve my original namespaces?

Yes, by selecting 'Yes' in the Preserve Namespaces option, the tool will maintain existing namespace declarations in the output.

What is the maximum file size allowed?

Each individual file must be under 10MB.

Does this tool support raw concatenation?

Yes, the 'Concatenate' strategy allows you to join files as raw XML strings without structural modification.

Hub

XML Conversion, Mapping, and XPath Delivery

Move structured data between XML, CSV, Excel, JSON, and text, merge compatible XML documents, extract selected paths, and verify the result before delivery.

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mergeStrategy: merge-children, handleRootElements: direct, preserveNamespaces: no, outputFormat: xml

Outcome

A clean, compact XML file containing all configuration parameters consolidated under one root element.