MarTools

MarTools

Guides & Tutorials

Practical guides for solving common tasks and getting more from the tools available on MarTools.

Latest guides

Hash Generator

SHA-1 to SHA-256: Can You Convert a SHA-1 Hash?

Learn whether a SHA-1 hash can be converted directly to SHA-256, why the two hashes are different, and how to generate a SHA-256 hash from the original data.

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Hash Generator

SHA-1 vs SHA-256: What’s the Difference?

Learn the difference between SHA-1 and SHA-256, how their hash values differ, and when each hashing algorithm may be encountered.

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Unit Conversion

GB to TB: How to Convert Gigabytes to Terabytes

Learn how to convert gigabytes (GB) to terabytes (TB), understand the difference between decimal and binary storage units, and convert common values quickly.

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QR Code

Are QR Codes Safe to Scan? QR Code Security Guide

Learn how QR codes work, what security risks to watch for when scanning them, and how to check a QR code destination safely.

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QR Code

Editable QR Codes: What They Are and How They Work

Learn what editable QR codes are, how dynamic QR codes work, and how they differ from standard static QR codes.

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QR Code

How to Create a QR Code From Text

Learn how to turn text into a QR code, generate a scannable code from plain text, and test it before sharing or printing.

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QR Code

How to Create a QR Code for a Link

Learn how to turn a web link into a QR code, test the result, and use the code for sharing online content.

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QR Code

How to Create a QR Code for a Website

Learn how to create a QR code for a website, convert a web address into a scannable code, test it, and use it effectively online or in print.

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QR Code

How to Convert a URL or Link to a QR Code

Learn how to convert a URL or website link into a QR code, how to test it, and where you can use a QR code for a link.

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Lorem Ipsum

How to Use Lorem Ipsum for Content Planning and Layout Testing

Learn how to use Lorem Ipsum when planning content, testing layouts, estimating text space, and building website or design prototypes without finalized copy.

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Text Utilities

How to Clean Copied Text Before Reusing It

Learn how to clean copied text from websites, PDFs, emails, documents, and other sources by removing unwanted spacing, formatting artifacts, duplicate line breaks, and inconsistent characters.

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Text Utilities

Text Formatting Guide: How to Format Plain Text Easily

Learn practical ways to format plain text for documents, websites, messages, and content workflows while keeping information clear and consistent.

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Text Utilities

How to Create URL Slugs From Text

Learn how to turn titles and phrases into clean, readable URL slugs for websites, blog posts, pages, and other online content.

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Password Generator

Password Entropy Explained: What Makes a Password Hard to Guess?

Learn what password entropy means, how randomness and length affect password strength, and why unpredictable passwords are harder to guess.

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Password Generator

How to Store Passwords Safely

Learn practical ways to store passwords securely, avoid common storage mistakes, and keep account credentials organized without relying on insecure notes or files.

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Password Generator

Password Manager vs Password Generator: What Does Each Do?

Learn the difference between a password manager and a password generator, what each tool does, and how they can work together to improve password security.

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Password Generator

How to Create Unique Passwords for Different Accounts

Learn why every account should have a unique password and how to create, organize, and maintain strong passwords without relying on password reuse.

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Color Tools

How to Create a Color Palette From an Image

Learn how to create a useful color palette from a photo, illustration, screenshot, or design reference by identifying dominant, supporting, and accent colors.

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Color Tools

RGB vs HSL: What’s the Difference and When Should You Use Each?

Understand the difference between RGB and HSL color formats, how they represent colors, and when each format is useful for design and web development.

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Color Tools

How to Use a Color Picker: Find and Identify Colors

Learn how color pickers work and how to identify HEX, RGB, and other color values from websites, images, screenshots, and digital designs.

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QR Code

QR Code Not Working? Common Problems and Fixes

Is your QR code not scanning or opening the right page? Learn the most common QR code problems and practical ways to troubleshoot them.

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QR Code

How to Use QR Codes for Events, Tickets, and Registration

Learn practical ways to use QR codes for event registration, tickets, check-in, schedules, directions, and attendee information.

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QR Code

How to Create a QR Code for Wi-Fi

Learn how Wi-Fi QR codes work, how to create one, where to use it, and how to test it before sharing your wireless network details.

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QR Code

How to Use QR Codes for Business and Customer Engagement

Learn practical ways businesses can use QR codes to share information, connect customers to digital content, simplify access, and support everyday customer interactions.

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Hash Generator

Common Uses of Hash Generators: 10 Practical Examples

Learn how hash generators are used for file verification, data integrity checks, development, testing, and other practical tasks.

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Tools

How to Hash Text Online: A Practical Guide

Learn how to hash text online, choose a hash algorithm, compare hash results, and use text hashes for verification and development tasks.

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Tools

How Cryptographic Hash Functions Work

Learn how cryptographic hash functions work, what makes a hash function secure, and how hashes are used for integrity, verification, and digital security.

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Tools

How to Compare File Hashes and Checksum Values

Learn how to compare file hashes and checksum values to verify that two files are identical or that a downloaded file matches a trusted reference.

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Tools

Hashing vs Encryption: What's the Difference?

Learn the difference between hashing and encryption, how each works, common use cases, and when to use hashing, encryption, or both.

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Tools

Lorem Ipsum Placeholder Text Best Practices

Learn practical best practices for using Lorem Ipsum placeholder text in design, development, mockups, prototypes, and content workflows.

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Tools

How to Use Lorem Ipsum in Graphic Design Projects

Learn how to use Lorem Ipsum as placeholder text in graphic design projects, including posters, banners, social graphics, advertisements, mockups, and marketing materials.

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Tools

How to Use Lorem Ipsum in Print Design and Publishing

Learn how to use Lorem Ipsum as placeholder text in print design, including brochures, flyers, magazines, books, reports, and other publishing projects.

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Tools

How to Use Lorem Ipsum to Test UI Components and Responsive Layouts

Learn how to use lorem ipsum to test UI components, cards, dashboards, typography, and responsive layouts before final content is available.

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Tools

How Much Lorem Ipsum Do You Need? A Practical Guide

Learn how much lorem ipsum to generate for cards, websites, landing pages, articles, prototypes, and other design projects.

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Tools

Lorem Ipsum vs Real Content: When to Use Placeholder Text

Compare lorem ipsum with realistic and final content to understand when placeholder text is useful and when real content should be used for design, testing, and development.

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Tools

How to Use Lorem Ipsum in Web Design and Prototyping

Learn how to use lorem ipsum effectively in web design, UI prototypes, wireframes, and responsive layouts while avoiding common placeholder-content problems.

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Tools

How to Generate Lorem Ipsum for a Website or Design

Learn how to generate lorem ipsum for websites, UI designs, prototypes, documents, and mockups, including how to choose the right amount of placeholder text.

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Tools

SHA-256 vs SHA-512: Differences, Security, and Use Cases

Learn the differences between SHA-256 and SHA-512, including output size, performance, security properties, compatibility, and common use cases.

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Tools

Hashing vs Encryption vs Encoding: What's the Difference?

Understand the difference between hashing, encryption, and encoding, including how each works, when to use it, and common examples.

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Tools

How to Verify a File Checksum: A Practical Guide

Learn how to verify a file checksum using MD5, SHA-1, or SHA-256, compare a downloaded file with a trusted checksum, and troubleshoot mismatched results.

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Tools

SHA-256 Hash Generator: How SHA-256 Works and How to Generate a Hash

Learn what SHA-256 is, how SHA-256 hashing works, how to generate a SHA-256 hash online, and how to use SHA-256 for data and file verification.

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Tools

MD5 vs SHA-256: Differences, Uses, and Which Hash to Use

Learn the differences between MD5 and SHA-256, how their outputs and security properties compare, and when each hash algorithm may be encountered.

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Tools

Hash Generator Guide: What Hashing Is and How to Generate Hashes

Learn what hashing is, how hash functions work, common hash algorithms, and how to generate a hash from text or other input using an online hash generator.

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Tools

Temperature Conversion Guide: Celsius, Fahrenheit and Kelvin

Learn how to convert temperatures between Celsius, Fahrenheit, and Kelvin with simple formulas, examples, and practical guidance.

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Tools

Weight and Mass Conversion Guide: Kilograms, Pounds, Grams and More

Learn how to convert weight and mass measurements between kilograms, grams, milligrams, pounds, ounces, and other common units.

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Tools

Length Conversion Guide: Meters, Feet, Inches, Kilometers and More

Learn how to convert length and distance measurements between meters, centimeters, millimeters, kilometers, inches, feet, yards, and miles.

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Tools

How to Convert Units: A Practical Guide

Learn how to convert units step by step using conversion factors, formulas, and an online unit converter, with practical examples for common measurements.

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Code

How to Format TypeScript: A Practical Guide

Learn how to format TypeScript code with practical examples covering Prettier, ESLint, interfaces, types, generics, functions, classes, async code, unions, and common TypeScript formatting mistakes.

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Code

How to Format Swift: A Practical Guide

Learn how to format Swift code consistently with practical examples covering swift-format, Xcode, functions, structs, classes, enums, optionals, closures, protocols, and common Swift formatting mistakes.

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Code

How to Format Kotlin: A Practical Guide

Learn how to format Kotlin code with practical examples covering Kotlin style, IntelliJ formatting, ktlint, functions, classes, data classes, collections, lambdas, null safety, and common formatting mistakes.

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Code

How to Format Rust: A Practical Guide

Learn how to format Rust code consistently with practical examples covering rustfmt, imports, functions, structs, enums, traits, control flow, macros, and common Rust formatting mistakes.

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Code

How to Format Go: A Practical Guide

Learn how to format Go code consistently with practical examples covering imports, functions, structs, interfaces, control flow, composite literals, comments, and common Go formatting mistakes.

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Code

How to Format PHP: A Practical Guide

Learn how to format PHP code, organize functions, classes, arrays and namespaces, follow PSR-12 conventions, and improve readability with a PHP code formatter.

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Code

How to Format C#: A Practical Guide

Learn how to format C# code, organize classes, methods, namespaces and properties, apply consistent indentation, and improve readability with a C# code formatter.

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Code

How to Format Java: A Practical Guide

Learn how to format Java code, organize classes, methods, imports and braces, apply consistent indentation, and improve readability with a Java code formatter.

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Code

How to Format Python: A Practical Guide

Learn how to format Python code, organize indentation, functions, classes and imports, follow PEP 8 conventions, and improve readability with a Python code formatter.

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Code

How to Format CSV: A Practical Guide

Learn how to format CSV files, organize rows and columns, handle delimiters and quoted values, and improve tabular data readability with an online CSV formatter.

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Code

How to Format INI: A Practical Guide

Learn how to format INI files, organize sections and key-value pairs, improve readability, avoid common syntax mistakes and use an online INI formatter.

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Code

How to Format TOML: A Practical Guide

Learn how to format TOML, organize sections, key-value pairs and arrays, avoid common syntax mistakes and use an online TOML formatter.

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Code

How to Format Markdown: A Practical Guide

Learn how to format Markdown, organize headings, lists, links and code blocks, improve readability and use an online Markdown formatter.

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Code

How to Format YAML: A Practical Guide

Learn how to format YAML, organize indentation and nested structures, avoid common formatting mistakes and use an online YAML formatter.

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Code

How to Format XML: A Practical Guide

Learn how to format XML, organize nested elements and attributes, improve readability and use an online XML formatter.

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Code

How to Format SQL: A Practical Guide

Learn how to format SQL queries, organize SELECT statements, JOINs and clauses, improve readability and use an online SQL formatter.

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Code

How to Format CSS: A Practical Guide

Learn how to format CSS code, organize selectors and properties, improve indentation and spacing, and use an online CSS formatter.

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Code

How to Format HTML: A Practical Guide

Learn how to format HTML code, organize indentation and spacing, improve readability and use an online HTML formatter.

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Code Formatter

How to Format JavaScript Online

Learn how to format JavaScript online, make messy code easier to read, and clean up indentation without changing what the code does.

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Code

How to Format JSON: A Practical Guide

Learn how to format JSON, make minified JSON readable, fix common formatting problems and work with structured JSON more efficiently.

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Code

Code Formatter Guide: How to Format and Clean Up Code

Learn what a code formatter does, why consistent formatting matters, how automatic formatting works and how to keep source code clean and readable.

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Colors

Color Contrast Guide: How to Choose Readable Color Combinations

Learn how color contrast works, how to choose readable foreground and background colors, and how to improve text and interface readability.

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Colors

How to Create a Color Palette

Learn how to create a useful color palette for websites, apps, branding and graphic design using primary, secondary, accent and neutral colors.

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Colors

How to Find a Color from an Image

Learn how to find and identify colors from an image, extract useful color values and use HEX, RGB or HSL codes in your design and development projects.

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Colors

How to Convert HEX to RGB

Learn how to convert HEX colors to RGB step by step, understand hexadecimal color values and use converted RGB colors in CSS and digital design.

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Colors

HEX vs RGB vs HSL: Understanding Color Formats

Learn the differences between HEX, RGB and HSL color formats, how each format represents colors, and when to use each one in web design and development.

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Colors

How to Choose Colors for a Design

Learn how to choose colors for a design using color relationships, contrast, visual hierarchy and practical palette-building techniques.

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Colors

Color Tools Guide: How to Choose, Convert and Use Colors

Learn how to use color tools to identify colors, convert between color formats, create palettes and choose practical color combinations for websites, graphics and digital projects.

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QR Codes

QR Code Best Practices: How to Make QR Codes Easy to Scan

Learn practical QR code best practices for design, placement, sizing, contrast, testing, accessibility and user trust so your QR codes remain easy to scan and use.

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QR Codes

How to Scan a QR Code: A Simple Guide for Phones and Computers

Learn how to scan a QR code using an iPhone, Android phone, computer or other device, plus what to do when a QR code will not scan.

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QR Codes

QR Code Size and Resolution Guide: How Large Should a QR Code Be?

Learn how QR code size, resolution, viewing distance, contrast and image quality affect scanning, with practical guidance for printed materials, screens and digital designs.

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QR Codes

QR Code Types and Uses: What Can QR Codes Be Used For?

Explore common QR code types and practical uses, including website links, text, contact information, payments, menus, events and digital marketing.

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QR Codes

How to Create a QR Code: A Simple Step-by-Step Guide

Learn how to create a QR code from a website URL, text or other information, choose the right settings and download or share the finished QR code.

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Password Security

Password Security Basics: Essential Tips for Safer Accounts

Learn the essential password security practices for protecting online accounts, including unique passwords, password managers, multi-factor authentication and safer account habits.

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Password Security

How to Use a Password Generator: Step-by-Step Guide

Learn how to use a password generator, choose the right settings, generate a random password and safely use the result for an account.

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Password Security

Random Password vs. Passphrase: Which Should You Use?

Compare random passwords and passphrases, including their length, randomness, memorability and practical uses for different types of accounts.

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Password Security

Password Length Guide: How Long Should a Password Be?

Learn why password length matters, how to choose a practical password length and how password length works with randomness and character variety.

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Password Security

Password Generator Guide: How to Create Strong Random Passwords

Learn how a password generator creates random passwords and how to choose length, character types and other options for different uses.

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Unit Conversion

Data Conversion Guide: How to Convert Bytes, KB, MB, GB, TB and PB

Learn how to convert digital data units including bytes, kilobytes, megabytes, gigabytes, terabytes and petabytes.

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Unit Conversion

Speed Conversion Guide: How to Convert km/h, mph, m/s, Knots and Mach

Learn how to convert speed between kilometers per hour, miles per hour, meters per second, feet per second, knots and mach.

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Unit Conversion

Area Conversion Guide: How to Convert Square Meters, Square Feet, Acres, Hectares and More

Learn how to convert common area units including square meters, square feet, square inches, acres, hectares, square kilometers and square miles.

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Unit Conversion

Volume Conversion Guide: How to Convert Liters, Milliliters, Gallons, Cups and More

Learn how to convert common volume units including milliliters, liters, cubic meters, gallons, quarts, pints, cups, fluid ounces, tablespoons and teaspoons.

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Unit Conversion

Weight Conversion Guide: How to Convert Grams, Kilograms, Pounds, Ounces and More

Learn how to convert common weight and mass units including grams, kilograms, pounds, ounces, milligrams, tons and stones.

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Unit Conversion

Unit Converter Guide: How to Convert Length, Weight, Temperature and More

Learn how unit conversion works and how to convert common measurements including length, weight, temperature, volume, area, speed, and digital data.

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Text Utilities

How to Reverse Text and Create URL-Friendly Slugs

Learn how to reverse text, create clean URL slugs, and prepare text for websites, links, and other common digital uses.

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Text Utilities

What Is Lorem Ipsum? A Practical Guide to Placeholder Text

Learn what Lorem Ipsum is, why placeholder text is used, where it comes from, and when a Lorem Ipsum generator is useful.

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Text Utilities

How to Extract Emails, URLs and Numbers from Text

Learn how to extract email addresses, URLs, and numbers from text quickly and organize useful information from copied content.

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Text Utilities

How to Find and Replace Text Quickly

Learn how to find specific text and replace it efficiently in documents, copied content, lists, and other text.

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Text Utilities

How to Clean Text Online: Remove Extra Spaces, Line Breaks and Duplicate Lines

Learn how to clean messy text by removing extra spaces, unwanted line breaks, and duplicate lines before using or publishing it.

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Text Utilities

How to Count Words and Characters Accurately

Learn how to count words and characters in text, understand word count differences, check reading time, and use a word counter when writing.

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Text Utilities

How to Change Text Case: Uppercase, Lowercase, Title Case and More

Learn how to change text between uppercase, lowercase, title case, sentence case, and other formats, with practical examples and tips.

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Career

How ATS Resume Scoring Works: What Your Resume Score Means

Learn how ATS resume scoring works, what affects a resume score, why keyword matching matters, and how to use an ATS score when reviewing your resume.

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Career

10 Common ATS Resume Mistakes and How to Avoid Them

Learn the most common ATS resume mistakes, including poor formatting, missing keywords, keyword stuffing, unclear sections, and failing to tailor your resume to the job description.

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Career

ATS Resume Keywords: What They Are and How to Use Them

Learn what ATS resume keywords are, how to find important keywords in a job description, where to use them on your resume, and how to avoid keyword stuffing.

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Career

How to Make a Resume ATS-Friendly: 10 Practical Tips

Learn how to make your resume ATS-friendly with practical tips for formatting, keywords, section headings, work experience, and tailoring your resume to a job description.

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Career

How to Format a Resume for ATS: A Practical Guide

Learn how to format a resume for applicant tracking systems, including resume sections, headings, formatting, keywords, and common ATS mistakes to avoid.

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Career

What Is an ATS? How Applicant Tracking Systems Work

Learn what an Applicant Tracking System (ATS) is, how ATS resume screening works, what employers look for, and how to make your resume easier to process.

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Career

How to Check Your Resume Against a Job Description

Learn how to compare your resume with a job description, identify relevant keywords, review job requirements, and improve resume alignment before applying.

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