⚡ 10-second version
Drop your files at tooladda.online/pdf-merge.html, drag the pages into the order you want, download one PDF. No 3-file cap, no "you've used your free merge today", no watermark on page one.
❗ Important
Every other free merger uploads your documents to their server, merges them there, and asks you to trust a retention policy. This one never sends a byte — which is the difference between merging a bank statement here and merging it somewhere else.
📏 The mixed-page-size problem nobody warns you about
Merge an A4 contract with a US Letter invoice and a phone photo, and the result is a PDF with three different page sizes. It looks fine on screen. Then someone prints it, and:
| Combination | What happens on paper |
|---|---|
| A4 (210×297 mm) + Letter (216×279 mm) | Letter pages are wider but shorter — printed on A4, content shifts and the bottom margin changes page to page |
| Portrait + landscape | The printer rotates some sheets and not others; a stapled bundle reads sideways |
| Phone photo (4:3) into an A4 doc | Either huge margins or a crop, depending on the fit mode |
Fix it before you merge: normalise everything to one page size, or accept the mix knowingly. The page preview here shows you the actual dimensions of each page, so you find out at the merge step rather than at the print shop.
And know what merging drops: bookmarks, form fields, digital signatures and JavaScript actions generally do not survive a merge intact. If you're combining a signed document, the signature's validity is gone — keep the signed original.
🧭 How it works
✨ What's inside
| ### 🖼️ Images merge like pages JPGs and PNGs slot in as real pages alongside PDFs. Scanned receipts photographed on a phone become part of the same document, no separate conversion step. | ### ↕️ Drag-and-drop page order Reorder at the **page** level, not just the file level — and delete the blank scanner page without opening a PDF editor. |
| ### 👁️ Page preview with dimensions See what you're merging and at what size, so mixed A4/Letter surprises happen on screen instead of on paper. | ### ♾️ No file or size cap The only limit is your device's memory. No server bill means no artificial 3-file free tier. |
🛠️ Real jobs
| Situation | What you do |
|---|---|
| 🧾 Expense claim | Merge a dozen photographed receipts into one PDF for finance. |
| 📑 Visa or loan application | Combine passport scan, payslips and statements into the single file the portal demands. |
| 🎓 Coursework submission | Merge chapters and appendices; drag them into the required order. |
| ✍️ Signed contract reassembly | Combine a signed page you printed and scanned back with the untouched pages. |
| 🏗️ Tender or bid document | Assemble technical, commercial and compliance sections into one bundle. |
| 🗂️ Archiving | Roll a year of monthly statements into one searchable file. |
📖 Four steps
1. Open → tooladda.online/pdf-merge.html
2. Drop → all your PDFs and images at once
3. Order → drag pages, delete the ones you don't want
4. Merge → download the single PDF
▶ Merge now — tooladda.online/pdf-merge.html
💡 Tip
Merging for an upload form with a size limit? Merge first, then run the result through the PDF Compressor with a target KB. Compressing each file individually before merging gives you a worse result for the same final size.
❓ FAQ
Is it free, and how many files can I merge?
Free, and as many as your device can hold in memory. No watermark, no daily cap, no signup.
Are my documents uploaded?
No. They're read and merged inside your browser. There is no upload endpoint to send them to.
Can I merge images with PDFs?
Yes — JPG and PNG become pages in the merged document.
Will bookmarks and form fields survive?
Generally not. Merging rebuilds the document; interactive features and digital signatures are typically lost. Always keep the signed original.
Why do my merged pages print at different sizes?
Because the sources were different sizes. Check the page dimensions in the preview and normalise before merging if the result will be printed.
Can I merge a password-protected PDF?
Remove the password first with the PDF Password Remover (you'll need the password — it's a remover, not a cracker), then merge.
🔬 Under the hood
- Client-side PDF assembly in vanilla JavaScript — no server, no upload, no queue.
- Page-level thumbnails rendered locally so reordering is visual rather than guesswork.
- Images encoded into real PDF pages at their native resolution.
- Works offline once the page is loaded.
Originally published on ToolAdda, where Merge PDF runs free in your browser — nothing is uploaded, nothing leaves your device.
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