· after-hours projects ·
Luijpers Labs

Niche software and the occasional experiment — made for family, friends, and colleagues.
Built on weekends. Shared with people we like.
Not serious. Not for sale. Just for fun.

· on the shelf ·

Niche tools, made with care.

A small shelf of finished tools and the occasional experiment. Some are polished, some are still settling in. Built on weekends, shaped by real use, shared with anyone who wants them.

PDF Toolkit Windows

A small desktop Swiss-army knife for the stack of PDFs that accumulates on a family laptop. Merge, split, extract pages, compress, watermark, lock with a password — nothing travels to a cloud, nothing hits a file-size limit. Slightly over-engineered on the watermarking side: throw in ten files and five stamps, it'll apply every stamp to every file and hand you back a tidy zip.

Dependency Tracker Windows

A quiet Windows app for peering inside a working Microsoft stack — SQL, Logic Apps, Power BI, the lot — and answering the one question that matters before you change anything: if I touch this, what breaks? Pick an object, get back a tidy list of what it depends on and what depends on it. Exports to Word when you need to hand the picture to someone in a meeting.

Statement Parser Windows

Drops a stack of bank, fund, or brokerage PDFs into tidy Excel rows — capital calls, contract notes, dividend statements, the occasional 1099. Works off a small library of templates; when a new statement format shows up, pop over to Template Builder and teach it one. Fully local, which felt like the only reasonable default for files with account numbers in them.

Template Builder Windows

The workbench that goes with Statement Parser. Load a sample PDF on one side, mark up the bits you want pulled out on the other — test, tweak, test again until the template behaves. Saves as a small JSON recipe; from there on, hundreds of the same statement type basically parse themselves.

PDF Message Mailer Windows

Point it at a spreadsheet of recipients and a folder of PDFs, and it pairs each document with the right person before quietly firing off the emails through Outlook. Supports per-recipient merge fields in the body and, cleverest bit, tiny tags inside PDF filenames that route the right file to the right account automatically. Built for the evening you'd rather not spend in mail-merge.