Guides
Practical guides on PDFs, writing, and SEO — grounded in how the tools on this site actually work, not generic advice.
Latest postHow to Merge PDF Files for Free (No Software, No Uploads)
Combining PDFs shouldn't mean installing software or uploading a private document to a stranger's server. Here's what actually works, and why it's safe.
How to Shrink a PDF Without Losing Quality (Mostly)
PDF compression is really a trade-off, not magic. Here's what's actually happening when a PDF shrinks, and how to get the smallest file without ruining it.
Flesch Reading Ease Explained: How to Write for Any Audience
That readability score under your word count isn't just a number — it's a formula from 1948 that's still one of the fastest ways to check if your writing is actually easy to read.
What Makes a Good URL Slug (And How to Write One)
The part of a URL after the last slash is small, but it's one of the few pieces of on-page SEO you fully control. Here's how to get it right, including at scale.