NotepadPlusPlus Has Upgraded!
The classic editor has evolved into a full suite of free developer tools. Your editor is still here — plus 20+ new utilities!
100% Client-side processing. Zero data uploaded. No login required.
Blazing fast utilities engineered exclusively for developer workflows.
Looking for a Notepad++ online experience without installing anything? Our Notepad++ Online Editor lets you write and edit code instantly — with syntax highlighting, multiple tabs, word wrap, and local auto-save. Perfect for quick edits on any device.
Use Notepad++ in your browser →The most frequently used developer utilities today.
Format, validate, and beautify JSON instantly in your browser. Works fully offline and in-browser, no data is uploaded.
Convert JSON arrays to CSV format instantly in your browser. Paste, convert, and download.
Retrieve real-time geographic location, ISP, and ASN metadata for any IP address.
Convert CSV data to JSON format instantly in your browser. Free and private.
Generate strong, cryptographically secure random passwords with custom length and character sets.
Cryptographically sign HS256 JSON Web Tokens (JWT) natively using Web Crypto API.
Standard online tools often store your data in logs or use it for training AI models. At NotepadPlusPlus, we've engineered every utility to work 100% on the client side. Whether you're formatting sensitive JSON, decoding a JWT, or generating a secure password, your data never leaves your browser. No strings, no logs, no server-side footprint.
Latency kills productivity. By eliminating the network "round-trip" required for server-side processing, our tools respond in milliseconds. Built with modern framework technologies like Astro and optimized vanilla JavaScript, you get the speed of a desktop application with the accessibility of a web browser.
From Network Diagnostics (like IP Lookup) to Security Utilities (like JWT Generators) and Data Converters, we provide a unified dashboard for all your everyday developer needs. We take inspiration from the classic Notepad++ editor—prioritizing utility, speed, and a distraction-free environment for professional engineers.
No daily limits. No "Pro" feature gates. No login walls. We believe the best developer tools should be open and accessible to everyone. Our platform is supported by non-intrusive advertising, ensuring these utilities remain free for the global developer community indefinitely.
Absolutely not. We engineered the entire platform using browser-native technologies. Everything from formatting to decoding happens locally inside your browser's execution engine. You can even use these tools while offline!
Yes, entirely free. We sustain the infrastructure through minimal, non-intrusive AdSense placements across the directory without requiring user accounts or premium payload restrictions. You are free to use them for personal and professional work.
The editor auto-saves temporarily to your local `localStorage`. If you close the tab, your sandbox code persists securely locally without ever touching a server cache. To clear it, simply used the Clear button in the editor toolbar.
Software Developer
I'm a Software Developer specializing in Angular, JavaScript, and TypeScript. I have a strong passion for building performant, user-friendly applications and developer tools that enhance productivity.
Code is like humor. When you have to explain it, it’s bad.