How do I merge multiple PDF files?

To merge PDFs, upload all files to PDFlite.io Merge tool (drag-and-drop or click Upload). The files appear as thumbnails. Drag thumbnails to reorder files and pages. Click Merge PDFs to combine them into one document. Processing takes 2-5 seconds. Download the merged PDF with no watermarks. You can merge 2 to 200+ PDFs in one operation, with no file size limits. The merged PDF preserves all formatting, fonts, images, and links from source documents.

Can I reorder pages when merging PDFs?

Yes, PDFlite.io provides full page-level control. After uploading multiple PDFs, you see thumbnail previews of all pages from all files. Drag-and-drop individual pages to any position—mix pages from different documents in any order. Insert pages between existing pages. Delete unwanted pages before merging. This flexibility lets you create custom documents like: Combined reports (merge executive summary, body, appendix), consolidated invoices (combine monthly invoices chronologically), merged contracts (combine main agreement with amendments), and assembled presentations (cherry-pick slides from multiple decks).

Is merging PDFs free?

Yes, PDFlite.io offers completely free unlimited PDF merging with no file size limits, no page limits, unlimited file count, no watermarks, and no account required. Merge 2 files or 200 files—always free. Paid plans ($21-$79/month) add batch automation, API access, and cloud storage integration, but core merging functionality is free forever for everyone. No hidden fees, no expiring trials, no credit card required.

Will merged PDFs preserve formatting?

Yes, PDFlite.io preserves 100% of original formatting: Fonts (embedded fonts remain intact), images (full resolution maintained), links (internal and external hyperlinks preserved), bookmarks (table of contents from all files combined), form fields (interactive forms remain functional), layers (transparency and overlays maintained), and metadata (can optionally preserve or reset). The merged PDF looks identical to opening all source PDFs individually. Special handling for: Scanned PDFs (image quality preserved), secured PDFs (must unlock first), and different page sizes (mixed page dimensions supported).

Can I merge password-protected PDFs?

PDFs with Document Open Password (prevents opening): Must unlock first using PDFlite.io Unlock PDF tool. Enter password to remove protection, then merge unlocked files. PDFs with Permissions Password (prevents editing): Can be merged directly—permissions are removed in merged output. After merging, you can re-apply password protection to the combined PDF using our Protect PDF tool. This ensures security—we cannot access or merge encrypted content without authorization. If merging sensitive documents, use our password protection after merging.

What file size can I merge?

PDFlite.io has no file size limits for merging: Individual PDFs: Up to 100MB each file. Total merged size: Unlimited (tested with 500+ page merged PDFs over 1GB). Number of files: Merge 2 to 200+ PDFs in one operation. Processing time scales linearly: 2-5 seconds per PDF (10 PDFs = 20-50 seconds total). For very large merges (100+ files), consider: Breaking into smaller batches if over 50 files for faster processing, using batch merge feature in paid plans for automated workflows. Most users merge 2-20 files, which processes in under 1 minute.

Can I merge specific pages from multiple PDFs?

Yes, PDFlite.io supports selective page merging: Method 1—Extract pages first: Use PDFlite.io Extract Pages tool to pull specific pages from each source PDF (e.g., pages 1-5, 10, 15-20), save extracted pages as separate PDFs, then merge the extracted PDFs. Method 2—Upload and delete: Upload all source PDFs to merger, view all pages as thumbnails, delete unwanted pages by clicking X on thumbnails, merge remaining pages. This is useful for: Combining executive summaries (page 1 from multiple reports), creating custom contracts (specific clauses from template documents), assembling presentations (cherry-picked slides from various decks), and consolidating invoices (first page of each invoice for accounting).

Does merging PDFs reduce quality?

No, merging PDFs is a lossless operation. PDFlite.io combines PDF files without recompressing images, downsampling fonts, or altering content. Quality remains 100% identical to source files. What is preserved: Image resolution (300 DPI stays 300 DPI), font crispness (no pixelation or blurring), vector graphics (logos and charts remain sharp), color profiles (CMYK, RGB, Pantone colors maintained), and transparency (alpha channels and blending modes preserved). File size: The merged PDF is equal to the sum of source PDFs (merge 5MB + 10MB + 8MB = 23MB merged PDF). If you need to reduce file size after merging, use PDFlite.io Compress tool separately.

Can I merge PDFs from cloud storage?

Yes, PDFlite.io integrates with cloud storage: Google Drive: Click Google Drive icon → Select PDFs from your Drive → Import directly to merger. Dropbox: Click Dropbox icon → Choose files from Dropbox folders → Merge without downloading first. OneDrive: Coming soon (currently upload from computer then save to OneDrive). Benefits: No need to download files locally first (saves time and storage space), merge files stored across different cloud accounts, upload merged PDF directly back to cloud storage. For paid plans: Two-way sync (merge files from Drive, save output back to Drive automatically), scheduled merges (automatically merge new files in a folder weekly/monthly), and API integration (merge via Zapier, IFTTT workflows).

How do I merge PDFs on mobile?

PDFlite.io works perfectly on mobile browsers: iPhone/iPad (iOS): Open Safari or Chrome → Visit pdflite.io/merge-pdf → Tap Upload → Select from Files app, iCloud Drive, or take photos to PDF → Reorder with finger drag → Merge. Android: Open Chrome → Visit pdflite.io → Upload from Google Drive, Downloads, or Camera → Touch and drag to reorder → Merge. Mobile features: Responsive UI optimized for touchscreens, finger-drag page reordering, preview thumbnails in grid or list view, direct upload from cloud storage apps. Limitations: Smaller screen makes fine reordering harder for 50+ files (use desktop for large merges), processing may be slower on older phones. For best mobile experience, keep merges under 20 files.

Merge Unlimited PDFs

Merge PDF Files Online Free

Combine multiple PDFs into one document. Drag-and-drop to reorder pages. No limits, no watermarks.

No registration required • Unlimited files • No watermarks

∞

Unlimited Files

Average Process Time

3.5M+

PDFs Merged

100%

Quality Preserved

How to Merge PDFs in 4 Steps

Combine multiple PDF files effortlessly

Upload Multiple PDFs

Drag-and-drop or select multiple PDF files from your device or cloud storage.

Arrange Pages

Drag thumbnails to reorder files and pages. Insert, remove, or rearrange as needed.

Merge PDFs

Click Merge. Processing takes 2-5 seconds per file with lossless quality.

Download Result

Download combined PDF. 100% formatting preserved. No watermarks added.

Why Choose PDFlite Merger

The most powerful free PDF merger

Unlimited Merging

Merge 2 to 200+ PDF files in one operation. No file size limits, no page limits, unlimited daily merges. Always free.

Page-Level Control

Drag-and-drop individual pages from multiple PDFs. Reorder, insert, or delete pages before merging. Full flexibility.

Lightning Fast

Merge PDFs in 2-5 seconds per file. Process 10 files in under 1 minute. Optimized for speed and reliability.

100% Secure

256-bit encryption during upload. Files auto-deleted after 1 hour. SOC 2 compliant. No human access to documents.

Lossless Quality

100% formatting preserved. Fonts, images, links, bookmarks all maintained. No compression or quality loss.

Cloud Integration

Import directly from Google Drive and Dropbox. Merge without downloading. Save results back to cloud storage.

Perfect For

Merge PDFs for any workflow

Business Documents

Combine contracts, reports, and invoices. Merge proposals with appendices and supporting documents.

Contracts, Reports, Proposals

Team Collaboration

Consolidate contributions from multiple team members. Merge sections from different authors.

Team Reports, Joint Projects

Document Management

Organize monthly invoices, statements, and records. Create single archives from multiple files.

Invoices, Statements, Archives

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