deepseek
beaf0e1f37
- 134-tool registry with programmatic SEO (unique titles/H1/descriptions, JSON-LD graphs, sitemap index, canonical 301 enforcement via required filter) - DB-backed job queue (SKIP LOCKED) with drivers: Ffmpeg, Images (GD), Pdf (qpdf/gs/poppler), Youtube (thumbnails), Qr (server-side PNG) - Security: SSRF guard, MIME validation, rate limits, API-key auth, bcrypt admin login, security headers - Admin panel: dashboard, tools/categories/guides CRUD, SEO audit, analytics, job inspector with retry, system health, feature flags - Docker deployment (nginx + web/api FPM pools + scalable workers), PHPUnit suite (19 tests / 1139 assertions), PWA manifest + service worker
52 lines
2.5 KiB
Markdown
52 lines
2.5 KiB
Markdown
---
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slug: how-to-merge-pdf-files
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title: "How to Merge PDF Files Into One Document"
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excerpt: "Combine scans, contracts and statements into a single ordered PDF — plus page-order tricks and privacy notes."
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seo_title: "How to Merge PDF Files Online – Free & Private"
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seo_description: "Merge multiple PDF files into one document online for free. Reorder pages, keep quality, and learn how private the process really is."
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date: "2025-12-18"
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tools: ["pdf-merger", "pdf-splitter", "pdf-page-extractor"]
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---
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Merging PDFs is the most common document chore there is: scanned pages that arrived separately, a contract split across three emails, statements needing one combined archive. Here is the fast path.
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## Merging in four steps
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1. Open the [PDF Merger](/pdf-merger).
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2. Upload your first file — then add the rest; upload order becomes page order.
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3. Press Merge.
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4. Download the combined document.
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Files are stitched with qpdf, a battle-tested open-source engine. Output keeps original page quality — no re-compression unless you ask for it separately.
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## Getting page order right
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The most common mistake: uploading files alphabetically when the intended order differs. Two fixes:
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- **Rename before uploading** (`01-scan.pdf`, `02-scan.pdf` ...).
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- Or merge first, then reorder by extracting page ranges with the [PDF Page Extractor](/pdf-page-extractor) and re-merging.
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## When to split instead of merge
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Sometimes the opposite job is needed. The [PDF Splitter](/pdf-splitter) breaks a document into single-page files (zipped), which suits:
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- Distributing individual chapters
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- Pulling one signed page from a packet
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## Privacy notes worth knowing
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- Merged documents exist on our workers only during processing and expire automatically afterwards.
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- Merging never adds identifying metadata — but source files may carry some. Run [PDF Metadata Remover](/pdf-metadata-remover) on sensitive output.
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- Nothing you merge is readable by other users; jobs are isolated per session.
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## FAQ
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**Is there a page or file limit?**
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Practical limits come from total upload size rather than file count — dozens of typical documents merge fine.
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**Do bookmarks and form fields survive?**
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Bookmarks flatten during merging (page content is preserved perfectly). Interactive form fields survive when they live on the pages being merged.
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**Why does my merged file look rotated?**
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Individual scans often carry inconsistent rotation flags. Rotate pages at the source scanner, or rasterize-and-rebuild via [PDF to JPG](/pdf-to-jpg) then [JPG to PDF](/jpg-to-pdf).
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