Learn, then do it with the right tool
Practical guides that explain the how and the why — the formulas, the examples, and the honest limitations — each one paired with a free tool that runs entirely in your browser.
Browse by topic
Developer Guides
3JSON, APIs, and everyday coding problems — explained with real examples and the tool to try each one.
ExplorePDF Guides
6Work with PDFs without giving up privacy: compress, split, extract, and manage documents in your browser.
ExploreFinance Guides
3Salary, tax, GST, and loan math — the formulas behind the numbers, with worked examples you can verify.
ExploreHealth Guides
4What health calculators actually measure — BMI, TDEE, and calorie estimates with honest limitations.
ExploreWriting Guides
3Write clearer, score your readability, and polish drafts with the same tools writers actually use.
ExploreStudent Guides
3Citations, research, and study workflow help — the style rules and steps that trip students up.
ExploreImage Guides
4Resize, compress, and prepare images for the web and social media — with the exact dimensions that work.
ExploreBusiness Guides
4Practical help for freelancers and small businesses: invoices, contacts, and everyday paperwork.
ExploreSEO Guides
2Meta tags, structured data, and search engine optimization — what actually affects rankings and how to implement it correctly.
ExploreDesign Guides
2CSS gradients, color contrast, and visual design principles — the technical details that make designs both beautiful and accessible.
ExploreBarcode & QR Guides
2QR codes and barcodes for marketing, inventory, and business — how to generate, scan, and use them effectively.
ExploreLatest resources
New guides are added as tools ship — each one tested against the tool it describes.
Word Count vs Character Count: When Each Limit Matters
Twitter enforces characters, essays enforce words, and forms enforce bytes — here's why the same text gets measured differently depending on context, and how to hit the right target.
How to Check If Your Writing Is Too Complex (and Fix It)
Short words and short sentences are the fastest way to make text readable — here's how to measure complexity, what the numbers mean, and how to simplify without losing meaning.
How to Format APA 7 Citations for Websites (Step by Step)
The most common citation type — and the one students get wrong most often. Here's the exact structure for a website reference in APA 7, with examples and the punctuation that matters.
Building a Study Workflow With Free Browser Tools
Citations, text analysis, document conversion, and time tracking — a practical setup for students who want to study efficiently without paying for software subscriptions.
How to Use TDEE to Set a Realistic Calorie Target
TDEE tells you how many calories you burn in a day — but the number alone doesn't tell you what to eat. Here's how to turn a TDEE estimate into a practical calorie target for weight loss, maintenance, or gain.
Understanding BMI's Limits and What to Use Instead
BMI is the most widely used health number in the world — and the most widely misunderstood. Here's what it can tell you, what it can't, and which numbers give a fuller picture.
About the Resources Library — Frequently Asked Questions
How ForgePlug's guides are written, verified, and connected to its tools.