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
2.5 KiB
slug, title, excerpt, seo_title, seo_description, date, tools
| slug | title | excerpt | seo_title | seo_description | date | tools | |||
|---|---|---|---|---|---|---|---|---|---|
| how-to-merge-pdf-files | How to Merge PDF Files Into One Document | Combine scans, contracts and statements into a single ordered PDF — plus page-order tricks and privacy notes. | How to Merge PDF Files Online – Free & Private | Merge multiple PDF files into one document online for free. Reorder pages, keep quality, and learn how private the process really is. | 2025-12-18 |
|
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.
Merging in four steps
- Open the PDF Merger.
- Upload your first file — then add the rest; upload order becomes page order.
- Press Merge.
- Download the combined document.
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.
Getting page order right
The most common mistake: uploading files alphabetically when the intended order differs. Two fixes:
- Rename before uploading (
01-scan.pdf,02-scan.pdf...). - Or merge first, then reorder by extracting page ranges with the PDF Page Extractor and re-merging.
When to split instead of merge
Sometimes the opposite job is needed. The PDF Splitter breaks a document into single-page files (zipped), which suits:
- Distributing individual chapters
- Pulling one signed page from a packet
Privacy notes worth knowing
- Merged documents exist on our workers only during processing and expire automatically afterwards.
- Merging never adds identifying metadata — but source files may carry some. Run PDF Metadata Remover on sensitive output.
- Nothing you merge is readable by other users; jobs are isolated per session.
FAQ
Is there a page or file limit? Practical limits come from total upload size rather than file count — dozens of typical documents merge fine.
Do bookmarks and form fields survive? Bookmarks flatten during merging (page content is preserved perfectly). Interactive form fields survive when they live on the pages being merged.
Why does my merged file look rotated? Individual scans often carry inconsistent rotation flags. Rotate pages at the source scanner, or rasterize-and-rebuild via PDF to JPG then JPG to PDF.