Devnstuff — Local-first browser scratch pad for developers Devnstuff is a free, privacy-first scratch pad that lives in your browser. Open as many tabs as you need — markdown notes, syntax-highlighted code snippets, a JSON formatter and validator, a hex/RGB/HSL color decoder, and an AES-GCM encrypted password vault. Everything is stored locally in IndexedDB on your device. No accounts, no servers, no telemetry, works offline.
$ init storage…
$ mount pads…
$ ready▍
What is Devnstuff? Devnstuff is a free, privacy-first scratch pad that lives in your browser. Open as many tabs as you need — markdown notes, syntax-highlighted code snippets, a JSON formatter and validator, a hex/RGB/HSL color decoder, and an AES-GCM encrypted password vault. Everything is stored locally in IndexedDB on your device. No accounts, no servers, no telemetry, works offline.
Features Markdown notes. A distraction-free markdown scratch pad with autosave for capturing ideas, todos, and meeting notes.Code snippet editor. Syntax-highlighted CodeMirror editor with TypeScript, JavaScript, Python, Go, Rust, SQL, Shell, YAML, HTML, CSS, and Markdown.JSON formatter & validator. Paste JSON, then format, minify, validate, or copy with one click. Inline error locations help you fix malformed payloads fast.Color decoder. Convert between HEX, RGB, HSL, and HSV with live sliders and a native color picker. Click any value to copy.Encrypted password vault. Store credentials locally with AES-GCM-256 encryption derived from your master passphrase via PBKDF2-SHA256 (600k iterations). Auto-locks on idle.Local-first storage. Everything is persisted in IndexedDB on your device. No accounts, no servers, no analytics. Works offline.Frequently asked questions
Is Devnstuff free? Yes. Devnstuff is completely free to use, with no sign-up, account, or paywall. There are no ads or trackers either.
Where is my data stored? All pads are stored locally in your browser's IndexedDB. Nothing is uploaded to a server. If you clear site data or switch browsers, your pads will not follow you unless you export them.
Does Devnstuff work offline? Yes. After the first visit the app continues to work without an internet connection because every feature runs entirely in your browser.
How are passwords stored? Password pads are encrypted at rest with AES-GCM-256 using a key derived from your master passphrase via PBKDF2-SHA256 (600,000 iterations). The passphrase is never stored or transmitted; the vault auto-locks after 5 minutes of inactivity and on every reload.
Which file types or pad types are supported? Devnstuff ships with five pad types: markdown notes, code snippets (multi-language), JSON, color, and encrypted password lists. You can open as many tabs as you want, each with its own type and title. Devnstuff requires JavaScript to run the interactive scratch pad. Please enable JavaScript to use the editor.