Guides
Some things are worth explaining properly rather than squeezing into a tool page: how to check whether a website is uploading your files, what actually comes out of a Malaysian salary, why two salary calculators disagree, which image format to pick, what makes a PDF refuse to compress, and what you give up when a QR code is dynamic. These are written to be read once and remembered, and each links the primary sources behind its claims.
How to tell whether an online tool is uploading your files
A free converter says it is private. Here is how to verify that yourself in about thirty seconds, using the browser you already have, on any site.
Malaysian take-home pay, end to end
What comes out of a Malaysian salary: the four statutory deductions, the order they apply in, and why EPF and SOCSO step in bands rather than percentages.
Why two salary calculators disagree
Same salary, same country, two different take-home figures. The six assumptions that cause it, and how to tell which calculator is wrong.
Which image format to actually use
JPG, PNG, WebP, AVIF, HEIC, GIF and SVG compared by what they are for — with the transparency, compression and compatibility trade-offs that decide it.
How PDF compression works
What actually takes up space in a PDF, which parts can be reduced, and why a text document that is already small stays that way no matter what you do.
Why PDF to Word is never perfect
A PDF holds no paragraphs, tables or reading order. What converters must infer, why some files convert cleanly, and when to run OCR first.
Static vs dynamic QR codes
Dynamic QR codes let you change the destination and see scan counts. They also stop working if you stop paying. When each one is the right choice.
Payment QR codes across Asia
How the major Asian payment QR schemes work, what is actually encoded in them, and why you cannot generate a valid merchant payment code with a generic QR tool.