There any free, lightweight app to merge PDF files as one?

As the name of the title in this post says it all. Okay, maybe not all it says because I want it on Linux desktop.

Looking for a tool that can combine different PDF into one big PDF file. I don’t need to modify the content of the PDFs. All important is merging them together as a group.

Sorting it probably comes as second important feature. But I can get on without that as long as it stays in sequence however I added each PDF file.

Lastly simple. No over the top effects. Prefer GUI app. Open to command line.


For that purpose, I have personally used PDF-Shuffler, It is a GUI desktop application on Linux. I used it back then on Ubuntu, but it should be available in all other major distros. Google for it. I know it is included in the official package management repositories of Ubuntu.

PDF-Shuffler can collate, sort (through drag and drop) and rotate the PDF files individually. As an added bonus, it can crop PDFs too.

It is a straightforward app. Stable for all those times I’ve used. But my usage is fairly moderate only.

I also suggest using pdftk for command line if you fancy that kind of stuff. You can combine PDFs into one as simple as:

:~$ pdftk file-1.pdf file-2.df file-3.pdf output my-merged.pdf

This tool can do other stuff. You can read its manual for more information. Google about pdftk too for more examples.

Digital Signature for PDF files through Web Application

We are developing a Web Application for manage dental clinics.
The app can generate PDF files through the PHP backend (for example invoices, quotes etc.).

Each of those PDF file needs to be digitally signed by both the app user (the clinician) and the patient.
The sign we are looking for is the Legally Signature European Standard (which requires biometrical parameters or a certificate issued by a trusted provider such as Infocert (but we are not 100% sure how to then use such certificate)).

On average, in our country, each patient signs 5-10 documents and because of this we ruled out third party services such as Docusign, Pandadoc, Eversign.. because the average cost of those api services would be excessive for our needs (and country economy).

Another solution we did think about is to use the signature pads (such as Wacom’s) that are capable to collect biometrical parameters, but we have no idea how to integrate such devices with our Javascript frontend (assuming it is even possible to interface those devices through the web browser).

Assuming our backend displays the PDF already generated to the client, what would it be the best approach to apply a digital signature to it through the client (which would then send back the signed PDF to the server for storage) ?
Is there a way to interact with signature pads devices through the browser (to extract the biometrical parameters together with the visual signature) ?


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Author: Nite