Blog
Guides and honest deep dives on the tools you use.
PDF Tools
PDF Compression: What It Can (and Can't) Do Yet
How PDF compression actually reduces file size, why image-heavy PDFs are the hardest case, and an honest limitation in our own compressor today.
2 min read
Calculators
What Actually Happens When You Refinance a Mortgage
How mortgage refinance break-even and lifetime savings are actually calculated, and the costs a quick estimate usually leaves out.
3 min read
Calculators
Margin vs. Markup: The Difference That Trips Everyone Up
Margin and markup use the same profit but divide by different numbers - here's the actual formulas, a worked example, and why they're easy to mix up.
2 min read
Calculators
How BMI Is Calculated (and Where It Falls Short)
How Body Mass Index is actually calculated, what the weight-category cutoffs mean, and the real limitations worth knowing before you rely on it.
2 min read