Merge PDF
Combine multiple PDFs into a single file. Reorder them with one click. Everything happens locally — nothing is uploaded.
Drop PDF files to merge
Drop two or more PDFs · they'll combine in the order shown
Drag up to 50 PDFs
How to use Merge PDF
- Open Merge PDF: Go to converter.plus/merge-pdf in any browser.
- Drop your PDFs: Drop two or more PDF files onto the drop zone, or click to select them.
- Reorder if needed: Use the arrows to move files up or down. They'll be merged in the order shown.
- Click Merge PDFs: Merging happens entirely in your browser using pdf-lib.
- Download the merged PDF: Click Download merged PDF — your single combined file is ready.
Why use Merge PDF
- ✓Drag-and-drop reordering across the whole batch — rearrange files by name before merging.
- ✓Combine 2 to 100+ PDFs into a single document with original page contents and form fields preserved exactly.
- ✓No upload required: pdf-lib runs the merge in your browser, so contracts, NDAs, and HR PDFs never leave your device.
- ✓Mixed page sizes (A4, Letter, scanned A3) are merged as-is without forcing them to a single page size.
- ✓Free with no signup, no watermark, no daily quota, and no per-file size limit beyond browser memory.
- ✓Works offline once the page has loaded — perfect for putting together a closing binder on a flight or in a SCIF.
About merging PDFs
Combining several PDFs into a single document is one of those small tasks that breaks far too often: free desktop tools force you through unrelated installer offers, online merge services upload your files to a server you cannot audit, and the macOS Preview shortcut quietly re-encodes your pages. The right answer for legal exhibits, closing binders, expense reports, multi-chapter manuscripts, and assembled application packets is a tool that runs locally and copies your pages byte-for-byte.
Converter.Plus performs the merge entirely in your browser using pdf-lib, the same library that powers many serverless PDF tools. Each source PDF is loaded into memory, its pages are referenced in the new document by their original object IDs, and the combined PDF is rebuilt with a fresh cross-reference table. Original page contents, embedded fonts, vector graphics, raster images, and form fields are preserved exactly — the resulting file is no larger than the sum of the inputs.
Because nothing is uploaded, the tool is suitable for sensitive documents — signed contracts, NDAs, HR records, medical reports — and works offline once the page has loaded. Drag the files into the queue, reorder with the up/down arrows so chapters land in the right sequence, then click Merge to download the single combined PDF.
Frequently Asked Questions
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Drag pages into a new order.
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Image Optimizer
Compress JPG, PNG, and WebP files for the web.
PDF to JPG
Render the merged PDF (or any other) into image pages.
Privacy & trust
- •PDFs are read into browser memory only — no upload, no server-side processing, no third-party API.
- •Works offline once the page has loaded; suitable for confidential or air-gapped environments.
- •No account, no email, no payment information collected; free for personal and commercial use.
- •Output PDF contains no Converter.Plus watermark, footer, or telemetry; original page streams are copied losslessly.