Free Online Tools & Practical Guides
MinimalDev provides simple online calculators, converters, and clear guides for everyday tasks.
Understand when to use each tool and get accurate results quickly.
Guides & Practical Tips
Read practical explanations before using tools. These guides explain formats, calculations, conversions, and real-world use cases so you can choose the right tool and understand the result.
Image Format Comparison
Compare PNG, JPG, and WebP, including when each format is best for photos, graphics, transparency, and web performance.
Read GuideReduce Image Size
Learn how compression affects file size and quality, and when JPG or WebP compression is the better choice.
Read GuideWhy Use WebP
Understand why WebP can improve page speed, how it compares with JPG and PNG, and when it is worth using.
Read GuideJPG vs PNG
Learn the practical difference between JPG and PNG for photos, screenshots, logos, transparency, and sharp graphics.
Read GuideImage Resize Guide
Resize images while preserving aspect ratio, avoiding distortion, and choosing suitable dimensions for web or social use.
Read GuideCrop Image Guide
Learn how cropping improves framing, composition, and image presentation.
Read GuideFree Image Tools
Find practical image tools for compression, cropping, conversion, and browser-based workflows.
Read GuideConvert Images With Minimal Quality Loss
Learn how format choice, source files, and export workflow affect image quality.
Read GuideOnline vs Offline Image Tools
Compare browser-based image tools with installed software for privacy, speed, and workflow depth.
Read GuideImage Optimization for Web
Learn how optimized images improve loading speed, reduce bandwidth, and create a better website experience.
Read GuideJSON Formatting Basics
Understand why formatting, validating, and minifying JSON matters when working with APIs and configuration data.
Read GuideLoan and Interest Basics
Learn how monthly payments, total interest, and amortization affect the real cost of borrowing money.
Read GuideWhy Use MinimalDev Tools?
MinimalDev provides practical online tools designed for real-world use cases. Each tool focuses on solving a specific problem quickly, without unnecessary complexity.
Unlike many generic tool websites, this platform emphasizes clarity and accuracy. Tools include detailed explanations, real examples, and guidance to help users understand results, not just generate them.
What You Can Do Here
- Calculate financial values such as loans and compound interest
- Format and validate developer data like JSON and Base64
- Generate secure random strings and identifiers
- Convert units and measurements accurately
Designed for Practical Use
Most tools run directly in your browser with no data sent to servers during normal use. This ensures privacy, speed, and reliability for everyday tasks.
Whether you are a developer, student, or general user, MinimalDev helps you get accurate results with clear understanding.
Popular tools
Start with commonly used tools for calculations, conversions, and quick checks.
Percent Calculator
Calculate percentages and changes.
OpenCompound Interest Calculator
Calculate long-term investment growth with compounding.
OpenLoan Calculator
Estimate loan payments and total interest.
OpenJSON Formatter
Format, validate, and debug JSON data easily.
OpenBase64 Encoder & Decoder
Encode and decode Base64 securely in your browser.
OpenRandom String Generator
Generate secure random strings for tokens and IDs.
OpenBrowse by category
Explore tools by category to quickly find what you need.
About MinimalDev
MinimalDev focuses on simple tools with clear explanations.
Each tool solves one problem clearly and efficiently.