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Summarize, ask questions, or extract key data — AI reads your PDF in seconds.
Drag and drop files to arrange them in any order
All processing happens in your browser, files never uploaded
Merge unlimited PDFs with no file size restrictions
Filator's PDF merger combines up to 20 PDF files into a single document, entirely in your browser. Nothing gets uploaded to a server. Your files stay on your device, the merge happens locally, and you download the result. No account, no watermark, no daily limits.
Most "free" PDF mergers — iLovePDF, Smallpdf, Sejda — upload your documents to their servers for processing. That means your contracts, invoices, and personal files sit on someone else's infrastructure, even if only for an hour. Filator doesn't work that way. Everything runs client-side using a Web Worker, so there's zero server involvement.
Filator processes PDFs locally using a Web Worker. No server upload, no cloud processing, no temporary file storage. If you're merging NDAs, financials, or medical records — they stay on your machine.
The merged PDF is clean. No "Merged with Filator" stamp, no degraded quality, no "upgrade to remove branding" popups. What goes in is what comes out.
You don't need to sign up, verify an email, or hand over any personal information. Open the page, merge your files, close the tab. That's it.
Merge as many times as you want. No "3 tasks per hour" cap like Sejda, no daily limits, no premium tier required for batch operations.
| Feature | Filator | iLovePDF | Smallpdf | Sejda |
|---|---|---|---|---|
| Processing | In your browser | Server upload | Server upload | Server upload |
| File Size Limit | 100MB per file | 100MB total | Varies | 50MB/file (free) |
| Max Files | 20 | 25 (free tier) | Varies | Varies |
| Usage Limits | Unlimited | Limited free tier | 2 tasks/day (free) | 3 tasks/hour |
| Watermark | Never | No (free tier) | No | No |
| Account Required | No | No | No | No |
| Custom Metadata | Yes | No | No | No |
The biggest difference is where your files go. With iLovePDF, Smallpdf, and Sejda, your PDFs are uploaded to their servers, processed there, and stored temporarily (usually 1-2 hours) before deletion. With Filator, nothing leaves your browser. The merge happens locally, which also makes it faster — no upload/download wait.
Combine multiple invoices into a single file for accounting, or merge contract pages with appendices and signature pages.
Visa applications, college admissions, job applications — they all want one PDF. Merge your resume, cover letter, transcripts, and certificates.
Combine departmental reports, analytics, or meeting notes into one document before sharing with stakeholders.
Scanned 15 pages and got 15 separate PDFs? Merge them into one file in seconds. Reorder pages if the scanner got them out of sequence.
Need to do more with your PDFs? Filator has a full set of free PDF tools, all processed in your browser:
Drop your PDF files into the upload area or click to browse. Reorder them by dragging (desktop) or using the arrow buttons (mobile). Optionally add a title and author in the metadata section. Click "Merge PDFs" and download your combined file. The whole thing takes seconds and happens entirely in your browser.
Yes. Filator processes your PDFs entirely in your browser using a local Web Worker. Your files never get uploaded to a server — they don't even leave your device. Most competing tools upload your documents to their servers for processing, which means your data sits on someone else's infrastructure temporarily.
Each PDF can be up to 100MB, and you can merge up to 20 files at once. There are no daily or hourly usage limits — merge as many times as you need.
No. Filator copies pages directly from the source PDFs without re-encoding or compressing anything. Fonts, images, links, and vector graphics stay identical to the originals.
No. Filator never adds watermarks to your files. The merged PDF is clean and ready to share — no paid upgrade required to remove branding.
No. The merge tool works without any account, login, or registration. Open the page, merge your files, download the result. If you want to access Filator's AI tools or save history, you can optionally create an account — but it's not needed for merging.
Yes. The tool works on all modern mobile browsers — Safari on iOS, Chrome on Android, and others. On mobile, use the arrow buttons to reorder files instead of drag-and-drop.
Filator can handle some encrypted PDFs automatically. For fully locked files, use the Unlock PDF tool first to remove the password, then merge.