PDF Merger
Combine multiple PDF files into one A4-sized PDF.
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About the PDF Merger
Combine multiple PDF files into one A4-sized PDF. This PDF tool processes your document locally — no uploads to any server. Upload your PDF and get results immediately. All PDF tools respect your privacy and work completely offline.
Maximum file size for PDFs is 20 MB.
How to Use the PDF Merger
- Open the tool — it loads instantly in your browser. No installation or registration needed.
- Provide your input — Upload your PDF by dragging and dropping it into the upload area, or click to browse. PDF files up to 20 MB are accepted.
- Configure settings — Adjust any options like page ranges, rotation, or compression settings.
- Process — Click the action button — the tool processes your PDF entirely in your browser.
- Get your result — view, copy, or download your output instantly.
Why Choose Our PDF Merger?
- 100% Free — No hidden fees, no premium tiers, no registration required. All 100+ tools on this site are completely free.
- Private & Secure — Everything processes locally in your browser. Your files and data never leave your device. We never see, store, or transmit your content.
- No Installation — Works directly in your browser on any device. No plugins, no downloads, no setup.
- Fast Results — Instant client-side processing with no server latency. Get your output in seconds.
- Works Offline — Installable as a PWA. Use our tools even without an internet connection.
Your privacy matters. Close the tab and your data is permanently gone — nothing is stored on our servers. For more details, read our Privacy Policy.
Frequently Asked Questions
Is the PDF Merger safe to use?
Yes. Tool input is processed locally in your browser and is not uploaded; we only record anonymous tool-open counts.
Do I need to pay to use it?
No, all tools on 100ToolCrate are 100% free with no hidden fees.
Will the merged PDF use the same page size?
Yes. The merged output uses A4 pages, and each original page is scaled and centered to fit.
Does it work on mobile devices?
Yes, our platform is fully responsive and works perfectly on smartphones and tablets.
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