Is merging PDFs free?

Yes — completely free with no account, no daily limits, and no file size restrictions.

How many PDFs can I merge at once?

There is no hard limit — merge as many PDFs as your device memory can handle. Most users merge 5–20 files without issues.

Can I reorder pages before merging?

Yes — drag the PDF thumbnails into the order you want before clicking Merge.

What is the maximum file size for merging?

There is no server-enforced limit since processing is in-browser. File size is limited only by your device's available memory.

All Tools

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Merge PDF

Free to Use

Combine multiple PDF files into one. Reorder files, then download the merged PDF instantly. Free, no upload, works in your browser.

Add PDF Files

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Drop PDF files here, or click to browse

Multiple PDF files supported · No file size limit

How it works

1Upload two or more PDF files
2Reorder files using the up/down arrows to set the page order
3Click Merge — the combined PDF downloads instantly in your browser

100% client-side · No upload · No file size limit · Supports encrypted-free PDFs

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No upload

Stays in browser

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Instant

pdf-lib powered

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Free

No limits

Frequently Asked Questions

Is this PDF merger free?›

Yes, completely free. No account required, no watermarks added, and no limit on the number of files you can merge.

How does the merge PDF tool work?›

Upload two or more PDF files, drag them into your preferred order, and click Merge. The tool combines all pages from every file into a single PDF that you download instantly.

Are my PDF files uploaded to a server?›

No. Merging happens entirely in your browser using pdf-lib. Your files never leave your device and are not stored anywhere.

Are there any file size limits?›

There is no enforced limit — performance depends on your browser's available memory. Very large PDFs (hundreds of MB) may be slow to process.

How does this compare to paid PDF tools like Adobe Acrobat?›

Adobe Acrobat and similar tools offer advanced editing, OCR, and cloud storage. This tool focuses on fast, private, browser-based merging at no cost — ideal when you just need to combine files without uploading them to a third-party service.

What Is PDF Merger?

A PDF merger combines multiple PDF files into a single document. Formly's free merge PDF tool works entirely in your browser — no file upload to any server, no file size limits beyond what your device can handle, and no account required. Drag and drop PDF files in the order you want, reorder them, then download the merged file instantly. Works for combining invoices, reports, scanned documents, presentations, and any multi-part PDFs into one unified file.

Why Formly's PDF Merger Is the Best Free Option

✓100% browser-based — files never leave your device, ensuring complete privacy.
✓No file size limits — merge large PDFs limited only by your device memory.
✓Drag-to-reorder — arrange pages in exactly the order you need before merging.
✓Free with no account — no signup, no email, no subscription.
✓Instant download — merged file is ready in seconds, no waiting for server processing.
✓Works on any device — Chrome, Firefox, Safari on desktop, tablet, or mobile.

Free Alternative to Smallpdf, iLovePDF, Adobe Acrobat, PDF2Go

→Smallpdf: Smallpdf limits free users to 2 tasks/hour and charges $12/month for unlimited. Formly is unlimited and free.

→iLovePDF: iLovePDF has file size limits on free tier and charges for premium. Formly has no such limits.

→Adobe Acrobat: Adobe Acrobat costs $22.99/month to combine PDFs. Formly is free.

→PDF2Go: PDF2Go requires uploading files to their servers. Formly processes files entirely in your browser.

Who Uses PDF Merger?

Business professionals

Combine monthly reports, invoices, and financial statements into single submission-ready PDFs.

Students

Merge multiple assignment documents, research pages, and appendices into one submission file.

HR & admin teams

Combine onboarding documents, policy PDFs, and employee records into organized single files.

Lawyers & legal professionals

Merge exhibit documents, evidence files, and court submissions into organized packages.

Freelancers

Combine portfolio pieces, proposal sections, and client reports into professional packages.

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Looking for a detailed guide? Read our in-depth tutorial on using PDF Merger for professional results.

Read Guide →

Free & unlimited — no account needed. Sign up to save history · Go Pro for advanced features