Merge PDF
Combine multiple PDF files into one document in the order you choose. Free, secure, no uploads.
How to merge pdf
- 1
Choose your PDF files
Click the upload area or drag files onto it. Nothing is uploaded — files are opened locally.
- 2
Start the conversion
Press the convert button. Your browser converts the files in seconds.
- 3
Download the result
Save each file individually or everything at once as a ZIP.
Join invoices, chapters, forms and scans into a single PDF. Your documents are merged locally in your browser, so sensitive files are never sent to a server.
What is PDF?
PDF (Portable Document Format) preserves a document’s layout on every device and operating system, which makes it the standard for sharing, printing and archiving.
Safe for confidential files
Unlike upload-based converters, ZapMorph processes files inside your browser tab. Your documents are never transmitted, stored or logged — close the tab and they’re gone.
Frequently asked questions
Is the merge pdf converter free?
Yes. Convert 1 file a day without an account, or 5 files a day with a free account. Pro removes all daily limits.
Are my files uploaded to a server?
No. The conversion runs entirely in your browser, so your files never leave your device. We only count how many files you convert — never their names or contents.
What is the maximum file size?
Up to 25 MB per file without an account, 50 MB with a free account, and 1 GB on Pro. Very large files also depend on your device’s memory.
Can I convert multiple PDF files at once?
Yes. Add several files and they’re combined into one document in the order you choose — 5 files on the free plan, 50 on Pro.
Does it work on Mac, Windows, iPhone and Android?
Yes. It works in any modern browser — Chrome, Edge, Firefox and Safari — on desktop and mobile, with nothing to install.
Related converters
JPG to PDF
JPGPDF
Combine JPG images into one PDF online. Choose A4, Letter or original size. Free, private, no watermark.
PNG to PDF
PNGPDF
Convert PNG images and screenshots into a single PDF document. Free, fast, no uploads, no watermark.
HEIC to PDF
HEICPDF
Combine iPhone HEIC photos into one PDF. Choose A4, Letter or original size. Free, private, no uploads.
TXT to PDF
TextPDF
Convert plain text files to clean, paginated PDFs with automatic line wrapping. Free and private.
PDF to JPG
PDFJPG
Convert every page of a PDF to high-quality JPG images. Up to print resolution. Free and private.
PDF to PNG
PDFPNG
Convert PDF pages to lossless PNG images at up to 216 DPI. Free, private PDF to image converter.