Code Nexus — Code Editor & Spreadsheet

Offline code editor with split previews, spelling, PHP/Java runtimes and an Excel/Google Sheets spreadsheet.

Code Nexus brings a code editor, a live preview and a spreadsheet into one local workspace for Chromebooks. Write and edit text files, open a folder as a workspace, and keep the rendered result beside your source. Web page and style previews update as you type, Markdown gets a live preview, and PHP or Java output can appear in the same split view when the optional local runtime bridge is running. The editor adds spelling help using the device dictionary, plus warnings for deprecated or incorrect code in the languages it supports. The spreadsheet is there for budgets, plans and quick calculations. It includes formulas, multiple sheets, merges, sorting and undo, and it opens and saves Excel workbooks. If you want to work with Google Sheets, connect your own Google OAuth client to open or push a sheet; the connection is optional. Code Nexus is built to keep your work on your device. Documents, settings and recent files are stored locally, with no account, analytics or advertising. Google Sheets is contacted only when you choose to connect, open or push. PHP and Java are not embedded; they run through a separate bridge that you start on your computer. The Chrome Web Store build keeps preview scripts disabled to comply with extension security rules. Rendered page, style, Markdown and runtime output still display. The spreadsheet supports .xlsx and .xlsm files; charts, pivot tables, macros and the older .xls format are not supported.