Jul 2026
Student
How to Calculate Your GPA From Letter Grades
The exact formula behind GPA, explained with a worked example, and how credit hours change the math.
Read more → Jul 2026 TextHow to Count Words and Characters for an Essay or Assignment
What actually counts as a "word," the spaces-vs-no-spaces trap, and tips for trimming to a strict limit.
Read more → Jul 2026 ImageHow to Reduce Image File Size Without Losing Quality
How JPEG compression works under the hood, and the quality setting that keeps photos looking sharp.
Read more → Jul 2026 PDFHow to Merge Multiple PDFs Into One File for Free
Combine scanned pages, reports, or forms into one document, in the right order, with no install.
Read more → Jul 2026 DeveloperHow to Format and Validate JSON (And Avoid Common Mistakes)
The syntax rules that break JSON most often, and how to actually read a confusing parser error.
Read more → Jul 2026 UtilityHow to Create a Strong Password You Can Actually Remember
Length beats complexity. Two realistic strategies for passwords that are actually strong.
Read more →More guides coming soon
We're adding new how-to guides regularly, covering each tool category in more depth. If there's something specific you'd like explained, let us know.