The Library

Guides & Tutorials

Master your digital tools with our expert guides.

JSON Tools

Mastering JSON Formatting

Why validating your JSON data is critical for API development and debugging.

Read Guide
Security

Password Entropy 101

The math behind secure passwords: why length beats complexity every time.

Read Guide
Image Tools

WebP vs PNG for SEO

How compressing images to modern formats improves your Google ranking.

Read Guide
PDF Tool

How to Combine Multiple PDFs

A simple step-by-step guide to merging documents instantly using UtilityKit.

Read Guide
Workflow

5 Reasons to Merge PDFs

How unified documents improve email etiquette, printing, and archiving.

Read Guide
Organization

The Ultimate Organization Guide

Use the "Digital Binder" strategy to declutter your files with a PDF merger.

Read Guide
Privacy

Why Client-Side Merging is Safer

Understand the security benefits of merging PDFs in your browser vs. the cloud.

Read Guide
Image Tool

How to Convert & Resize Images

A step-by-step guide to preparing your images for the web using UtilityKit.

Read Guide
Format Guide

JPG vs PNG vs WebP

Which format should you choose? We explain the pros and cons of each.

Read Guide
SEO Tips

Optimize for Website Speed

Improve your Google Core Web Vitals by optimizing your image sizes.

Read Guide
Photography

Photographer's Bulk Guide

How to quickly create lightweight client proofs without uploading RAW files.

Read Guide
QR Tool

How to Generate Custom QRs

A complete guide to creating WiFi, URL, and VCard QR codes for free.

Read Guide
Marketing

10 Creative QR Uses

Boost your small business marketing with these inventive QR strategies.

Read Guide
Tech Trends

The 2025 QR Comeback

Why QR codes returned from the dead to become essential tech.

Read Guide
Technical

Static vs Dynamic QRs

Which one should you use? We explain the pros, cons, and privacy risks.

Read Guide
OCR Tool

How to Extract Text from Images

Step-by-step guide to converting screenshots and photos into editable text.

Read Guide
Productivity

Stop Retyping, Start Scanning

How OCR technology saves you hours of manual data entry work.

Read Guide
Organization

Digitizing Your Home Office

A simple strategy to go paperless by digitizing receipts and records.

Read Guide
Privacy

How Client-Side OCR Protects Data

Why local processing is safer than cloud uploads for sensitive docs.

Read Guide
Calc Guide

How to Use the Calculator

A complete guide to using the Science, BMI, and Loan modes efficiently.

Read Guide
Finance

Loan Planning 101

Understand how interest rates affect your mortgage repayments instantly.

Read Guide
Health

Understanding Your BMI

A quick guide to checking and interpreting your Body Mass Index score.

Read Guide
Tech

Online vs. Physical Calc

Why you should switch to a browser-based scientific calculator today.

Read Guide
Security

How to Generate High-Entropy Passwords

Learn what makes a password truly secure and how to generate credentials hackers can't crack.

Read Guide
Psychology

Why "Password123" Is Unsafe

Explore the psychology behind password habits and why removing the human element is key.

Read Guide
Math

Entropy: The Math of Security

Understand the mathematics of password security and why length beats complexity.

Read Guide
Checklist

The 2025 Security Checklist

Should you change your password every 90 days? Here is the modern security checklist.

Read Guide
Guide

How to Format & Debug JSON

A complete guide to handling JSON data: formatting, validating, and debugging instantly.

Read Guide
Troubleshoot

Fix Common JSON Errors

Trailing commas, wrong quotes, and other syntax errors: how to find and fix them quickly.

Read Guide
Best Practice

Why JSON Formatting Matters

Understanding the difference between minification and beautification for clean code.

Read Guide
Workflow

Streamlining API Integration

How using the right browser tools can speed up your API development and debugging.

Read Guide
Guide

How to Compress Without Losing Quality

Learn the secrets to significantly reducing file size while keeping your images sharp.

Read Guide
SEO

Speed Up Your Website

Improve Core Web Vitals and Google rankings by optimizing your image assets.

Read Guide
Email

Email Attachments Made Easy

Beat the 25MB limit: how to shrink PDF contracts and reports for instant sharing.

Read Guide
Technical

Lossless vs. Lossy Compression

Which one should you choose? A guide to balancing file size vs. image quality.

Read Guide
Guide

How to Encode & Decode Base64

A step-by-step guide to converting text and files to Base64 strings and back.

Read Guide
Concept

What is Base64 Encoding?

Understand why we use Base64 to represent binary data in text-only protocols.

Read Guide
Web Dev

Base64 in Web Development

How Data URIs and API payloads rely on Base64 to streamline data transfer.

Read Guide
Debug

Debugging Encoded Strings

A quick utility for programmers to decode and inspect hidden data in JWTs and APIs.

Read Guide
Guide

How to Convert Unix Timestamps

Struggling to read 10-digit numbers? Learn how to convert Unix time to human dates.

Read Guide
History

Understanding the Unix Epoch

Why does computer time start in 1970? Explore the history of the Epoch.

Read Guide
Debugging

Why You Need a Converter

Logs often store time as integers. Learn how to correlate events and debug errors quickly.

Read Guide
Best Practice

Handling Time Zones Correctly

UTC vs Local: The golden rules of managing date formats in modern web apps.

Read Guide
Guide

Get Mid-Market Rates Instantly

Stop losing money to hidden spreads. Learn how to check the real value of your money.

Read Guide
Freelancing

The Freelancer’s Payment Guide

How to invoice international clients without losing 5% of your paycheck to fees.

Read Guide
Travel

Travel Smart: Converting on the Go

Avoid the DCC trap at ATMs and terminals. Why you should always pay in local currency.

Read Guide
Economics

How Exchange Rates Work

Supply, demand, and central banks: a beginner's guide to understanding Forex.

Read Guide
Regex

The Power of Regex

Simplifying complex search patterns: learn how to validate emails and phone numbers instantly.

Read Guide
Diff Tool

Spot Changes in Code

The easiest way to compare file versions and find missing semicolons or deleted lines.

Read Guide
Essentials

5 Essential Browser Tools

From Regex testers to CSS validators: the must-have bookmarks for frontend developers.

Read Guide
Workflow

How to Validate & Compare

Why relying on your IDE isn't enough: a guide to using browser-based validators.

Read Guide