Blog

Guides, tutorials, and tips on online tools, privacy, and productivity.

Explore our 35 articles. They include step-by-step guides for using our tools and posts on online privacy, cryptography, web performance, and development best practices.

lorem ipsum8 min·Jul 15, 2026

When Not to Use Lorem Ipsum

Lorem ipsum helps with early layout and typography but hurts content-first design, UX writing, and accessibility. Learn when to use real content instead.

readme8 min·Jul 11, 2026

How to Write a Great README in Markdown

Learn how to write a great README: the essential sections, Markdown tips for each, and two copy-ready templates you can paste into any project.

hash8 min·Jul 8, 2026

MD5 vs SHA-256: Which Should You Use?

A focused MD5 vs SHA-256 comparison: output size, speed, MD5's broken collision resistance, the right use cases for each, and a clear recommendation.

cooking8 min·Jul 4, 2026

Cooking Conversions: Cups, Grams and Ounces

Convert cups to grams, fluid ounces to milliliters and oven temperatures with confidence, plus why weighing beats measuring for reliable baking.

currency8 min·Jun 30, 2026

How Exchange Rates Work: What Moves Them

Understand what an exchange rate is and how interest rates, inflation, trade, and speculation make currencies rise and fall against each other.

file security9 min·Jun 25, 2026

Dangerous File Extensions That Carry Malware

Learn which file extensions can carry malware, how attackers disguise executables, scripts, macros and double extensions, and how to check a file safely.

privacy9 min·Jun 20, 2026

What Your Files Reveal: EXIF and PDF Metadata

Hidden metadata in photos, PDFs and Office files can expose your location, name and edit history. Learn what it reveals and how to inspect and remove it.

file security8 min·Jun 16, 2026

How to Check If a File Is Safe to Open

Practical steps to judge whether a downloaded file is safe: check extensions, type mismatches, macros, PDF scripts and hashes before you click.

JSON9 min·Jun 8, 2026

JSON APIs for Beginners: Requests, Responses & Debugging

A beginner-friendly guide to JSON and APIs: syntax, making requests, debugging common errors, validation, and essential tools.

code review8 min·Jun 1, 2026

Code Review Best Practices: Reviewing Diffs & PRs

Learn how to use diff tools effectively for code review - reading diffs, reviewing PRs, giving feedback, and integrating comparison into your workflow.

CSS8 min·May 26, 2026

CSS Color Systems: HEX, RGB, HSL & When to Use Each

A practical guide to CSS color formats for developers: HEX, RGB, HSL, oklch, custom properties, and modern color features.

encoding9 min·May 18, 2026

Character Encoding Explained: ASCII, UTF-8 & URL Encoding

A developer deep-dive into encoding systems: how ASCII, UTF-8, Base64, and URL encoding work, why they exist, and how to avoid encoding bugs.

QR7 min·May 6, 2026

QR Codes for Small Business: Marketing Guide 2026

How small businesses can use QR codes for menus, payments, loyalty programs, and marketing campaigns - with real-world examples.

images9 min·Apr 29, 2026

How to Optimize Images for Web Performance (Core Web Vitals)

Master image optimization for the web: modern formats, lazy loading, responsive images, and how to improve your Core Web Vitals scores.

passwords8 min·Apr 23, 2026

Password Manager vs Browser Passwords: The Truth

Compare dedicated password managers with built-in browser password storage - security, features, and which one to trust with your credentials.

PDF8 min·Apr 15, 2026

The Complete Guide to PDF Accessibility

Learn how to create accessible PDFs that meet WCAG and PDF/UA standards - tagged structure, alt text, reading order, and more.

VPN8 min·Apr 6, 2026

VPN vs Proxy: What Actually Hides Your IP?

Understand the real differences between VPNs and proxies, how each hides your IP, and which one you should use for privacy and security.

speed test7 min·Feb 3, 2026

Internet Speed Test: How It Works & Tips for Faster Internet

Learn how internet speed tests work, what download/upload/ping mean, and practical tips to improve your connection speed.

privacy10 min·Feb 24, 2026

Online Privacy Guide 2026: Protect Your Digital Life

Comprehensive guide to online privacy: VPNs, browser security, password management, two-factor authentication, and privacy-focused tools.

developer9 min·Mar 27, 2026

10 Free Online Tools Every Developer Needs in 2026

A curated roundup of the best free browser-based developer tools for text, code, images, PDFs, and more - no sign-up required.

diff7 min·Mar 20, 2026

Text Diff Guide: How to Compare Documents & Code

Learn how text diff works, when to use it for code review and document comparison, and how to interpret additions and removals in our free diff tool.

lorem ipsum6 min·Mar 13, 2026

Lorem Ipsum Guide: Placeholder Text for Design & Development

Learn what Lorem Ipsum is, its history, when to use placeholder text in design and development, and how to generate it instantly with our free tool.

base647 min·Mar 5, 2026

Base64 Encoding Explained: How It Works & When to Use It

Understanding Base64 encoding: the algorithm, use cases in web development, data URIs, performance considerations, and common misconceptions.

markdown7 min·Feb 12, 2026

Markdown Guide for Beginners: Write Better Documentation

Complete Markdown tutorial from basics to advanced: headings, lists, code blocks, tables, links, images, and where Markdown is used.

hash9 min·Jan 27, 2026

Hash Functions Explained: MD5, SHA-256 & Beyond

Understanding hash functions: how they work, common algorithms (MD5, SHA-1, SHA-256, SHA-512), use cases, and why they matter for security.

color8 min·Jan 19, 2026

Color Theory for Web Developers

Master color theory for the web: learn about color models, accessibility, contrast ratios, palettes, and how to choose the perfect colors for your projects.

JSON8 min·Jan 8, 2026

JSON Formatting & Validation Guide

Complete guide to JSON: formatting, validation, minification, common errors, and best practices for working with JSON data.

text6 min·Dec 14, 2025

Text Tools Every Developer Needs

Essential text manipulation tools for developers: word counting, case conversion, Base64 encoding, URL encoding, and more.

images7 min·Dec 3, 2025

Image Compression: Reduce Size Without Losing Quality

Learn how image compression works, the difference between lossy and lossless, and how to optimize images for web and social media.

units7 min·Nov 19, 2025

Unit Conversion Guide: Length, Weight, Temperature & More

Master unit conversions with our comprehensive guide covering length, weight, temperature, volume, area, speed, and more.

currency6 min·Nov 4, 2025

How to Convert Currencies Online - Complete Guide

Learn how to convert currencies with live exchange rates, tips for international transfers, and how to get the best rates.

QR6 min·Oct 21, 2025

QR Code Guide: Create, Customize & Track

Everything you need to know about QR codes: how they work, how to create them, customization options, and best practices.

security8 min·Oct 2, 2025

How to Generate Secure Passwords in 2026

Complete guide to creating strong, uncrackable passwords. Learn about entropy, password managers, and best practices.

PDF5 min·Sep 17, 2025

How to Merge PDFs Online for Free

Step-by-step guide to merging multiple PDF files into one document online, without uploading to any server.

IP7 min·Sep 3, 2025

What Is My IP? Public vs Private IPs Explained

Learn the difference between public and private IP addresses, how to find yours, and why it matters for your online privacy and security.