Merge PDF Files in Seconds
Combine multiple PDFs into a single document instantly. No uploads, no limits, 100% free and secure.
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Drop PDF files here
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Smart Ordering
Drag and drop files to arrange them in any order
100% Private
All processing happens in your browser, files never uploaded
No Limits
Merge unlimited PDFs with no file size restrictions
How to Merge PDF Files Online for Free
Filator's free PDF merger lets you combine unlimited PDF files into a single document instantly in your browser—no file uploads, no server processing, no signup required. Unlike iLovePDF (100MB limit), Smallpdf (server uploads), and Sejda (3 tasks/hour cap), Filator processes everything locally on your device for complete privacy with no restrictions.
Why Choose Filator's PDF Merger?
⚡ No File Size Limits
Merge PDFs up to 100MB each (20 files maximum) with no premium upsells. Competitors like Sejda cap free users at 50MB per file and iLovePDF limits total upload to 100MB across all files.
🔒 100% Private & Secure
Your PDFs never leave your browser. All processing happens locally using WebAssembly, unlike iLovePDF, Smallpdf, and Sejda which upload files to their servers (stored for 1-2 hours before deletion).
♾️ No Hourly Limits
Merge unlimited PDFs with no task caps, no daily limits, no watermarks, and no premium upsells. Sejda restricts free users to 3 tasks per hour; we have zero restrictions.
🌐 Works Offline
Compatible with all modern browsers on any device. Works offline after first load (PWA support)—perfect for merging sensitive documents without internet connectivity.
How to Merge PDF Files Step-by-Step
- 1.Click "Select PDF Files" or drag and drop your PDFs into the upload area (up to 20 files, 100MB each)
- 2.Arrange the PDFs in your desired order using the up/down arrows or drag-and-drop reordering
- 3.Optionally set document metadata like title, author, and subject for your merged PDF
- 4.Click "Merge PDFs" to combine all files into one document instantly
- 5.Download your merged PDF immediately—no waiting for email delivery or server processing queues
Filator vs Competitors Comparison
| Feature | Filator | iLovePDF | Smallpdf | Sejda |
|---|---|---|---|---|
| File Size Limit | 100MB/file | 100MB total | Unspecified | 50MB/file |
| File Processing | Client-side | Server upload | Server upload | Server upload |
| Task Limits | Unlimited | 25 files free | Hourly limit | 3/hour |
| Registration | Never required | Optional | Optional | Optional |
| Works Offline | Yes (PWA) | No | No | No |
Advanced Features
- • Preserve Quality: Maintains original PDF quality and formatting with zero compression or quality loss
- • Custom Metadata: Set title, author, subject, and keywords for your merged PDF for better organization
- • Reorder Pages: Arrange PDFs in any order before merging using drag-and-drop or arrow buttons
- • Batch Processing: Merge up to 20 PDFs at once with no hourly caps or daily limits
- • Cross-Platform: Works on Windows, Mac, Linux, iOS, and Android with any modern browser
- • Offline Support: Install as PWA to merge PDFs without internet after initial load (unlike server-dependent tools)
- • Lightning Fast: Merge PDFs in under 100ms using WebAssembly—no server queues or upload waits
- • No Watermarks: Unlike some free competitors, Filator never adds watermarks to merged PDFs
Common Use Cases
📄 Document Management
Combine invoices, contracts, or reports into organized, single-file documents for easier sharing and storage
🎓 Academic Work
Merge research papers, assignments, or study materials into comprehensive documents for submission or review
💼 Business Reports
Create comprehensive reports from multiple PDF sources like analytics, charts, and summaries
📚 E-book Creation
Combine chapters, cover pages, or sections into complete e-books ready for distribution
Frequently Asked Questions
How do I merge PDF files online for free?
Upload your PDF files by clicking "Select PDF Files" or drag and drop them into the upload area. Arrange the PDFs in your desired order using the up/down arrows, optionally set document metadata like title and author, then click "Merge PDFs". Your merged PDF downloads instantly with no waiting or email delivery.
Is the PDF merger really safe and secure?
Yes, absolutely. Unlike competitors that upload files to their servers (iLovePDF, Smallpdf, Sejda), Filator processes everything in your browser using WebAssembly. Your PDFs never leave your device, ensuring complete privacy and security. There's zero server upload risk.
What's the maximum file size I can merge?
Each PDF can be up to 100MB, and you can merge up to 20 PDFs at once. This is significantly more generous than competitors: iLovePDF (100MB total limit), Sejda (50MB per file), and Smallpdf (unspecified limits with hourly restrictions).
Do merged PDFs lose quality?
No, merging maintains the exact same quality as your original PDFs. We combine files without any compression or quality loss, so your merged PDF is identical to the source documents.
Can I merge PDFs without uploading to a server?
Yes! Filator is one of the few PDF mergers that processes files 100% client-side in your browser. Your files never leave your device, unlike iLovePDF, Smallpdf, and Sejda which require server uploads and store files for processing.
Is registration required to merge PDFs?
No account creation or signup is ever required. Unlike competitors who push registration for premium features or higher limits, Filator is completely free and anonymous forever.
Can I use this on mobile devices?
Yes, our PDF merger works perfectly on all modern mobile browsers including Safari on iOS and Chrome on Android. It's also available as a PWA (Progressive Web App) for offline use.
How many PDFs can I merge at once?
You can merge up to 20 PDFs at once, with each file up to 100MB. There are no hourly limits, daily restrictions, or task caps unlike Sejda (3 tasks/hour) or iLovePDF (premium required for bulk operations).
Ready to Merge Your PDFs?
Start merging PDFs instantly with no signup, no file size restrictions, and complete privacy. Fast, secure, and completely free—with none of the limitations you'll find on iLovePDF, Smallpdf, or Sejda. Try Filator now and experience truly unlimited PDF merging.