Notepad+ — Free Online Code Editor & 200+ Developer Tools
A free, browser-based code editor with live preview, syntax highlighting for 20+ languages, and a library of 200+ developer utilities. No sign-up required. Everything runs locally in your browser.
What you can do with Notepad+
- Write and preview HTML, CSS, JavaScript, TypeScript, Python, JSON, Markdown, and more in a Monaco-powered editor with multi-tab support.
- Auto-save your work to the browser so nothing is lost when you close the tab, and lock a private workspace behind a PIN.
- Format, minify, encode, decode, hash, and convert data with 200+ dedicated tools — JSON, XML, YAML, Base64, JWT, UUID, QR codes, and more.
- Merge, split, rotate, watermark, compress, and add page numbers to PDF files without uploading them to a third-party service.
- Resize, crop, convert, and compress images (PNG, JPG, WebP, SVG) entirely in the browser.
Explore Notepad+
- Open the Code Editor — multi-tab editor with live HTML/CSS/JS preview.
- Browse 200+ Developer Tools — formatters, encoders, converters, generators.
- Read the Blog — guides on JSON, PDFs, images, security, and web development.
- About Notepad+ — how the editor works, who it's for, and why it's free.
- Contact — feedback, feature requests, and bug reports.
Popular free tools
- JSON Formatter — beautify and validate JSON.
- Base64 Encoder and Base64 Decoder.
- URL Encoder / Decoder.
- UUID Generator, Password Generator, QR Code Generator.
- Merge PDF, Split PDF, Compress PDF.