Date and time5 min read
What Is a Unix Timestamp?
Learn how Unix timestamps work, why developers use epoch time, and how to convert timestamps to readable dates.
XKit Blog
Developer tutorials for the tools you use every day
Practical explanations for timestamps, JWTs, cron schedules, hashing, and common debugging work.
Start with the workflows developers debug most often.
Move from explanation to a working tool whenever you need to test a value.
Authentication6 min read
How to Decode a JWT Token
A practical guide to decoding JSON Web Tokens, reading JWT claims, and understanding what signature verification does.
Automation6 min read
How to Write Cron Expressions
Understand cron syntax, common schedules, and debugging tips for writing reliable cron expressions.
Security5 min read
MD5 vs SHA-256: Which Hash Should You Use?
Compare MD5, SHA-1, SHA-256, and SHA-512 for checksums, integrity checks, and security-sensitive hashing.
Developer Tools4 min read
How to Use the Base64 Encoder
Learn when to use the Base64 Encoder, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the Base64 Decoder
Learn when to use the Base64 Decoder, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the JWT Encoder
Learn when to use the JWT Encoder, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the URL Encoder And Decoder
Learn when to use the URL Encoder And Decoder, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the URL Parser
Learn when to use the URL Parser, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the HTML Minifier / Uglifier
Learn when to use the HTML Minifier / Uglifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the HTML Beautifier / Prettifier
Learn when to use the HTML Beautifier / Prettifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the Javascript Minifier / Uglifier
Learn when to use the Javascript Minifier / Uglifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the Javascript Beautifier / Prettifier
Learn when to use the Javascript Beautifier / Prettifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the JSON Minifier / Uglifier
Learn when to use the JSON Minifier / Uglifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the JSON Beautifier / Prettifier
Learn when to use the JSON Beautifier / Prettifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the CSS Minifier / Uglifier
Learn when to use the CSS Minifier / Uglifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the CSS Beautifier / Prettifier
Learn when to use the CSS Beautifier / Prettifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the XML Minifier / Uglifier
Learn when to use the XML Minifier / Uglifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the XML Beautifier / Prettifier
Learn when to use the XML Beautifier / Prettifier, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the SQL Formatter
Learn when to use the SQL Formatter, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the Color Code Converter
Learn when to use the Color Code Converter, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the JSON To YAML
Learn when to use the JSON To YAML, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the YAML To JSON
Learn when to use the YAML To JSON, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the JSON To CSV
Learn when to use the JSON To CSV, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the CSV To JSON
Learn when to use the CSV To JSON, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the Properties To YAML
Learn when to use the Properties To YAML, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the YAML To Properties
Learn when to use the YAML To Properties, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the Text Case Converter
Learn when to use the Text Case Converter, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the Regex Tester
Learn when to use the Regex Tester, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the String Inspector
Learn when to use the String Inspector, common workflows, practical examples, and how to get accurate results with XKit.
Developer Tools4 min read
How to Use the API Key Generator
Learn when to use the API Key Generator, common workflows, practical examples, and how to get accurate results with XKit.
Diff Tools4 min read
How to Use the Text Comparison Tool
Learn when to use the Text Comparison Tool, common workflows, practical examples, and how to get accurate results with XKit.
Diff Tools4 min read
How to Use the Image Comparison Tool
Learn when to use the Image Comparison Tool, common workflows, practical examples, and how to get accurate results with XKit.
Diff Tools4 min read
How to Use the Document Comparison Tool
Learn when to use the Document Comparison Tool, common workflows, practical examples, and how to get accurate results with XKit.
Diff Tools4 min read
Compare Excel Cell Values: First-Sheet and Row-Position Limits
Learn how XKit compares Excel values, why inserted rows produce many differences, and what formatting and formulas the comparison does not check.
Calculators4 min read
How to Calculate a Weighted Course Grade
Calculate a weighted course average with a worked example and distinguish assessment weights from credit-hour GPA calculations.
Calculators4 min read
How to Use the Final Grades Calculator
Learn when to use the Final Grades Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the IRA Calculator
Learn when to use the IRA Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the 401k Calculator
Learn when to use the 401k Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Mortgage Calculator
Learn when to use the Mortgage Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Refinance Calculator
Learn when to use the Refinance Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the House Affordability Calculator
Learn when to use the House Affordability Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the VAT Calculator
Learn when to use the VAT Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Income Tax Calculator
Learn when to use the Income Tax Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Interest Rate Calculator
Learn when to use the Interest Rate Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Compound Interest Calculator
Learn when to use the Compound Interest Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Basic / Scientific Calculator
Learn when to use the Basic / Scientific Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Percentage Calculator
Learn when to use the Percentage Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Average Calculator
Learn when to use the Average Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the BMI Calculator
Learn when to use the BMI Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Pregnancy Calculator
Learn when to use the Pregnancy Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Bra Size Calculator
Learn when to use the Bra Size Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Age Calculator
Learn when to use the Age Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Date Difference Calculator
Learn when to use the Date Difference Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Hours Calculator
Learn when to use the Hours Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
How to Use the Countdown Timer
Learn when to use the Countdown Timer, common workflows, practical examples, and how to get accurate results with XKit.
Calculators4 min read
Latitude and Longitude Distance: Haversine Formula and Limits
Estimate great-circle distance between coordinates, enter negative latitude and longitude correctly, and distinguish straight-line distance from a driving route.
Calculators4 min read
How to Use the CIDR Calculator
Learn when to use the CIDR Calculator, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
How to Use the Time Unit Converter
Learn when to use the Time Unit Converter, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
How to Use the Height Converter
Learn when to use the Height Converter, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
How to Use the Weight Converter
Learn when to use the Weight Converter, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
How to Use the Distance Converter
Learn when to use the Distance Converter, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
How to Use the Area Converter
Learn when to use the Area Converter, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
How to Use the Temperature Converter
Learn when to use the Temperature Converter, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
How to Use the Time Zone Converter
Learn when to use the Time Zone Converter, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
How to Use the Digital Storage Converter
Learn when to use the Digital Storage Converter, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
How to Use the Network Speed Converter
Learn when to use the Network Speed Converter, common workflows, practical examples, and how to get accurate results with XKit.
Converters4 min read
MAC to IPv6 Link-Local Address: Modified EUI-64 Explained
Convert a 48-bit MAC address to a modified EUI-64 IPv6 interface identifier and understand why it cannot reveal a device's actual assigned IP address.
Generators4 min read
How to Use the QR Code Generator
Learn when to use the QR Code Generator, common workflows, practical examples, and how to get accurate results with XKit.
Generators4 min read
How to Use the Barcode Generator
Learn when to use the Barcode Generator, common workflows, practical examples, and how to get accurate results with XKit.
Generators4 min read
How to Use the Lorem Ipsum Generator
Learn when to use the Lorem Ipsum Generator, common workflows, practical examples, and how to get accurate results with XKit.
Generators4 min read
How to Use the Placeholder Image Generator
Learn when to use the Placeholder Image Generator, common workflows, practical examples, and how to get accurate results with XKit.
Generators4 min read
How to Use the Random Password Generator
Learn when to use the Random Password Generator, common workflows, practical examples, and how to get accurate results with XKit.
Generators4 min read
How to Use the Spinner Wheel
Learn when to use the Spinner Wheel, common workflows, practical examples, and how to get accurate results with XKit.
Generators4 min read
How to Use the Dice Roller
Learn when to use the Dice Roller, common workflows, practical examples, and how to get accurate results with XKit.
Generators4 min read
Online Coin Flips: Probability, Streaks, and Simulation Limits
Understand simulated heads-or-tails results, why streaks occur, and when an online coin flip is unsuitable for a decision.
Generators4 min read
How to Use the UUID Generator
Learn when to use the UUID Generator, common workflows, practical examples, and how to get accurate results with XKit.
Generators4 min read
Random Numbers Without Duplicates: Ranges and Sampling Limits
Generate integers within inclusive bounds, understand unique sampling, and learn why Math.random() is unsuitable for security-sensitive values.