Juntar PDF
Combine vários arquivos PDF em um único documento
What Is a PDF Merger?
A PDF merger combines multiple PDF documents into a single file while preserving the original quality, formatting, fonts, and images of every page. TweakFiles merges PDFs entirely in your browser using pdf-lib — a JavaScript library that copies page data directly without re-encoding. This means zero quality loss, unlike some server-based tools that recompress pages during the merge process.
Why Merge PDFs?
Merging PDFs is one of the most common document tasks in business and personal workflows. Rather than sending 5 separate attachments, you send one organized file. Rather than hunting through 12 scanned pages, you have one searchable document. Specific scenarios where merging is essential:
- Job applications — combining resume, cover letter, references, and portfolio into a single PDF
- Legal filings — assembling contracts, exhibits, and supporting documents into one package
- Tax preparation — merging W-2s, 1099s, receipts, and statements for an accountant
- Academic submissions — combining research paper, appendices, and supplementary materials
- Real estate — assembling purchase agreements, inspections, disclosures, and title documents
- Scanned documents — combining individual page scans into a single multi-page document
- Reports — merging monthly reports into quarterly or annual compilations
How TweakFiles Merge Works
TweakFiles uses pdf-lib to copy pages directly from source PDFs into a new combined document. Each page retains its original dimensions, fonts, images, and vector graphics. The process is entirely lossless — no recompression, no quality degradation, no pixel changes. The merged file size is approximately equal to the sum of all source files, minus shared resources that get deduplicated.
How to Merge PDF Files in 3 Steps
Upload Your PDFs
Drag and drop multiple PDF files into the drop zone, or click to browse. You can add more files at any time using the "Add More" button. TweakFiles accepts PDFs of any size — there's no file count or size limit. All processing happens in your browser, so your documents never leave your device.
Reorder If Needed
Use the up/down arrow buttons to arrange your PDFs in the exact order you want them merged. The final document will follow this sequence precisely. This is especially useful when combining scanned pages that weren't scanned in order, or when assembling a report from multiple sections.
Download Merged PDF
Click "Merge" and your combined PDF is ready in seconds. The download starts automatically with the filename "merged.pdf". Your original files are never modified or deleted — TweakFiles creates a new file from copies of the source pages.
TweakFiles vs Other PDF Mergers (2026)
| Feature | TweakFiles | iLovePDF | Smallpdf | Adobe Acrobat |
|---|---|---|---|---|
| Price | Free forever | Free / $7/mo Premium | Free / $12/mo Pro | Free (limited) / $13/mo |
| Where Files Are Processed | Your browser only | iLovePDF servers | Smallpdf servers | Adobe servers |
| Signup Required | Never | No (free tier) | After 2 tasks/day | After 1 task |
| File Count Limit | Unlimited | 25 files (free) | 2 tasks/day (free) | 1 task (free) |
| Reorder Before Merge | Yes (arrow buttons) | Yes (drag and drop) | Yes (Pro only) | Yes (Pro only) |
| Quality Preservation | Lossless (direct copy) | Lossless | Lossless | Lossless |
| Processing Speed | Instant (no upload) | Depends on internet | Depends on internet | Depends on internet |
| Works Offline | Yes | No | No | Desktop app only |
Competitor pricing verified March 2026 and may change.