CodeHelper
Free Online Tools for Developers
Supercharge your workflow with lightweight, browser-based utilities for coding, design, and productivity. Format JSON, convert units, generate colors, and optimize code. All fast, free, and private. No sign-up. No clutter. Just the tools you need.
Build Smarter with Lightweight, Sustainable Tools
CodeHelper is built around focused, single-purpose utilities that run directly in your browser. Instead of relying on bloated frameworks or cloud APIs, you get instant results for tasks like formatting JSON, converting units, or generating a README—all with zero setup.
This approach makes every tool fast, privacy-friendly, and energy-efficient. No unnecessary dependencies, no tracking, just clean output and a smoother workflow that helps you ship faster while keeping things sustainable.
Insights, Tutorials, and Developer Guides
CodeHelper isn’t just about tools, it’s also about sharing knowledge. Our articles cover JavaScript tips, AI security, ethical hacking, and practical how-to guides to help you level up as a developer.
Whether you’re exploring new coding techniques, looking for productivity hacks, or diving into real-world security challenges, the Articles section is designed to give you actionable insights you can use right away.
Latest Articles & Tutorials
How to Use JSON in JavaScript
A practical guide to understanding and using JSON for data exchange in modern web development.
10 JavaScript Snippets Every Developer Should Keep in Their Clipboard Manager
Boost your productivity with these reusable snippets. Copy-paste ready for every dev.
Can AI Be Hacked? Real-World Attacks and Defenses
Explore how attackers compromise AI-powered apps and how to defend them. A must-read for anyone building with AI in 2025.
AI-powered cyberattacks: how AI is fueling a new wave of hacking
AI is scaling cybercrime: ransomware automation, deepfake fraud, spear phishing at scale, and adaptive malware. Data-backed analysis with practical defenses.
Building a Hacker Dropbox with Raspberry Pi and Twingate
Learn how to build a remote access dropbox using Raspberry Pi and Twingate (ZTNA). Ideal for IT support and ethical hacking.
Polar Night Energy Builds Industrial-Scale Sand Battery in Pornainen
Discover how Polar Night Energy’s new Sand Battery in Pornainen delivers 1 MW thermal power, stores 100 MWh, and cuts emissions by 70% in district heating.
Open Source, Performance-First, Community-Powered
CodeHelper is a collection of client-side, privacy-friendly developer tools. No accounts, no servers, just fast utilities that run in your browser. If you care about speed, accessibility, and sustainable engineering, you’re in the right place. Help us refine existing tools, suggest new ones, or improve docs and UX.
Start with a pull request or open an issue on GitHub . Whether it’s adding a formatter, polishing a converter, fixing an edge case, or proposing a brand-new idea, your contributions make this privacy-first developer toolbox better for everyone.