Martin Šikula

I'm a developer based in the Czech Republic, running Sikulovi s.r.o. — a small company focused on building web tools that actually respect your privacy.

PDFey started from a personal frustration. Every time I needed to merge a contract or split an invoice, the options were either expensive desktop software or online tools that wanted me to upload my files to some unknown server. That felt wrong, especially for sensitive business documents.

So I built PDFey. The idea is simple: all PDF processing happens right in your browser. Your files never touch any server. No accounts, no subscriptions, no data collection. Just open the tool, drop your file, and get the result.

What I work on

Besides PDFey, I build and maintain several other free web tools under the Sikulovi umbrella. Each one solves a specific problem I kept running into:

• ·Pictey — image editing tools (resize, convert, compress)
• ·CodeUtil — developer utilities (formatters, encoders, generators)
• ·TypeCount — word and character counter
• ·FreeTimer — online timers and stopwatches

My approach to building tools

Privacy isn't a marketing checkbox for me — it's a technical decision. When your browser handles the processing, there's no server to hack, no database to leak, no logs to subpoena. That's the kind of guarantee I want for my own documents, and it's what PDFey gives you.

I use TypeScript and Next.js for most projects. For PDF work specifically, PDFey relies on pdf-lib for manipulation and Mozilla's PDF.js for rendering. Both are open-source, well-maintained libraries trusted by millions of users.