FileMerger

What it does

FileMerger lets you merge multiple Excel files instantly without breaking headers, formatting, or formulas. Unlike traditional tools, it’s built to handle messy files, mixed structures, and inconsistent data automatically. No installation, no learning curve — just upload and merge. Ideal for analysts, teams, and anyone tired of manual copy/paste chaos. Simple, fast, and works directly in your browser.

Combine CSV, Excel (.xlsx, .xls), TSV, and JSON datasets locally in your browser. Automatic header mapping, data deduplication, and zero server uploads.

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