Friday, 4:47pm. Your client wants one PDF — proposal, contract, and the two scope docs — in their inbox before they leave. You have four files on your desktop and zero patience for downloading software.
Dragging the files into a browser tab should be all this takes. Here's how to make merging that direct in Flint's merge tool.
Drop the files in any order
Open merge PDFs, then drag your four PDFs straight from Finder or File Explorer onto the page. Order doesn't matter at this stage — Flint shows a thumbnail card for each file the moment it lands. You can drop ten files at once or add them one at a time. The page never refreshes, never asks you to wait in a queue, and never wedges your files behind a sign-up wall.
Reorder by dragging thumbnails
Grab any card and slide it left or right. The other cards make room. This is where drag-to-merge actually earns its keep: you can see the cover, the contract, and the scope at a glance, so when you put the proposal first and the appendix last, you're working visually rather than guessing at filenames. Need to remove a file? Hover the card and hit the close icon. Add another? Drop it in.
Merge and download
Hit Merge. Flint stitches everything into a single PDF and offers it for download in the time it took to read this sentence. The output keeps all original page sizes — A4 alongside Letter alongside a scanned receipt — and there's no watermark, no banner, no shrinking of any page to fit a template.
When drag-to-merge is the wrong tool
If you're merging hundreds of files in a recurring pipeline, you want a scripted approach, not a browser. And if your source PDFs have form fields you need preserved, double-check them after merging — annotate the result if you need to add review marks. For one-off combinations under 50 files, dragging beats every other method.
FAQ
How many PDFs can I merge at once?
There's no hard limit in the interface. We've tested with 50+ files comfortably. Past that, your browser's memory will be the bottleneck, not Flint.
Do the files upload to a server?
Merging happens in your browser. The PDFs never leave your machine, which is why there's no upload progress bar — there's nothing to upload.
Can I drag from email straight to the merge tool?
Yes, if your mail client supports drag-out (Gmail, Outlook desktop, Apple Mail). Drag the attachment directly onto the Flint tab and it joins the queue like any local file.
Does the merge add a watermark?
No. Flint never watermarks output, free or paid. The merged file is yours, unbranded.
Drag, drop, merge, send. That's the whole flow. Try it with merge PDFs.