About Master Merge
Master Merge is a free tool for merging and converting files. No signup, no ads, no dark patterns. Just upload your files, get your result, and move on with your day.
Privacy First
Every file operation happens right in your browser. Your files are never uploaded to any server. We can't see them, we can't store them, we can't share them. That's the point.
Browser-Powered
Master Merge uses modern JavaScript libraries like pdf-lib, SheetJS, and the Canvas API to process files directly in your browser. No server infrastructure needed.
What we believe
- File tools should be free and accessible
- Your files are your business, not ours
- Simple tools should be simple to use
- No account should be needed for basic file operations
Honest limitations
Some file operations are genuinely hard to do perfectly in a browser. PDF merging works flawlessly. Image operations are rock solid. But complex Word document merging or PDF-to-PowerPoint conversion have limitations when done client-side. We'll always be upfront about what works well and what's best-effort.