PDF Guides & Tips

We started writing these guides because the same questions kept coming up while we built pdfdots. Why did a portal reject a perfectly normal PDF? Why is a two-page scan 18 MB? Why does a merged file suddenly show pages sideways? The tool pages answer the mechanical part, but the real problems usually sit one step earlier or later, in the form you are filling in or the printer you are sending to. The blog is where we explain that surrounding context in plain language.

Building tools that run entirely in the browser taught us a lot about how PDFs actually behave. A file that looks simple can hide dozens of embedded fonts, an oversized photo on every page, or a rotation flag that some viewers respect and others ignore. We have also learned where the browser runs out of road: very large Office conversions and layout-faithful Word exports still need a server, and we say so openly instead of pretending otherwise. Everything else stays on your own device.

Our suggestion for reading: skim the headings, find the step that matches your situation, then open the linked tool in another tab and follow along with your own file. Each guide is written around a real task, such as sending a signed lease, shrinking a scan for a job application or turning bank statements into a spreadsheet, so you can usually skip the parts that do not apply. Where there is a trade-off, we tell you which option we would pick and why, and you are free to disagree.

On privacy, our position is simple. Most PDFs people handle are personal: tax forms, medical letters, IDs, payslips. We would rather not have them, so the browser tools never upload anything. The few conversions that need our server in Germany are marked on the page, travel over HTTPS and are deleted as soon as the result is sent back. If a document is too sensitive even for that, we recommend doing the conversion in your own office software instead.