TutorialJune 5, 2026
How to Calculate Your GPA: Step-by-Step
Learn the exact math behind your Grade Point Average (GPA). Calculate your semester or cumulative GPA easily with our step-by-step tutorial.
Ac
Academic Support Team 4 min read
Blog & Tutorials
Get the most out of our free developer, math, and AI-powered productivity tools. Browse our collection of guides, comparisons, and deep dives.
ExplanationJune 5, 2026
What is MD5 Hash Used For & Is It Safe?
Learn what the MD5 cryptographic hash algorithm is, where it is still used today, and why it is no longer secure for storing user passwords.
Cy
Cybersecurity Analyst 5 min read
ComparisonJune 5, 2026
JSON vs XML: Which Data Format Should You Choose?
Compare JSON and XML data serialization formats. Understand their syntax differences, advantages, and use cases in modern APIs and software development.
Le
Lead API Architect 4 min read
ListicleJune 5, 2026
Top 5 Free AI Writing Tools to Double Your Content Speed
Discover the best free AI writing assistants available on FreeToolsHub. Write blog posts, professional emails, captions, and resume points instantly.
Co
Content Strategist 4 min read
TutorialJune 8, 2026
How to Fix og:image Not Showing on WhatsApp, Facebook & LinkedIn
Link preview showing no image? Learn the 7 most common reasons your og:image fails on WhatsApp, Facebook, X, and LinkedIn — and how to fix each one in minutes.
SE
SEO & Web Team 6 min read
ExplanationJune 9, 2026
Open Graph Tags Explained: The Complete Guide (2026)
What are Open Graph tags, which ones actually matter, and how do you add them correctly? A practical guide with copy-paste examples for every major platform.
SE
SEO & Web Team 7 min read
TutorialJune 10, 2026
The Perfect og:image Size: Exact Dimensions for Every Platform (2026)
Stop guessing image sizes. The exact og:image dimensions, aspect ratios, and file size limits for Facebook, X, LinkedIn, WhatsApp, Discord, and Slack.
SE
SEO & Web Team 5 min read
ComparisonJune 7, 2026
PNG vs JPEG vs WebP: Which Image Format Should You Use?
A practical comparison of the three main web image formats — file size, quality, transparency, and browser support — with simple rules for choosing the right one.
SE
SEO & Web Team 6 min read
TutorialJune 6, 2026
How to Convert PNG to WebP Online — Free, Private, No Upload
Convert PNG images to WebP in seconds without installing software or uploading files to a server. Step-by-step guide plus tips to keep quality and transparency.
SE
SEO & Web Team 4 min read