References
References — 9 free browser-based developer tools including ASCII Table, HTML Entities Reference and CSS Units Reference. Everything runs locally with no signup or uploads, so your data stays private and results are instant.
9 tools
ASCII TableFree online ASCII table for all 128 standard characters (0-127), showing decimal, hex, octal, binary and HTML entity values, with instant search and filters for control, printable and symbol characters.
HTML Entities ReferenceFree online HTML entities reference listing named and numeric character codes by category, from arrows and currency to math and punctuation. Search any entity and copy its code or symbol.
CSS Units ReferenceFree online CSS units reference covering px, em, rem, %, vw, vh, vmin, vmax and ch by category, with clear explanations of when and how to use each absolute and relative unit.
Emoji PickerFree online emoji picker to browse and search thousands of emojis by category. Find the right one in seconds and copy it to your clipboard with a single click.
Git CheatsheetFree online Git cheatsheet with searchable commands by category, from branching and merging to rebase, stash and reset, each showing usage and a danger level to avoid mistakes.
Linux Commands ReferenceFree online Linux commands reference that organizes the most-used commands by category such as files, processes, and networking, searchable with usage examples.
Keyboard Shortcuts ReferenceFree online keyboard shortcuts reference that organizes the most useful VS Code, Chrome, macOS, and Windows hotkeys by category, searchable for any action.
Semver CheckerFree online semantic version comparator that takes two semver strings, compares their major, minor and patch components, and analyzes the difference to tell you which version is newer and the type of release change.
Browser Compatibility CheckerFree online browser compatibility checker showing which versions of Chrome, Firefox, Safari and Edge support a given CSS, JavaScript, HTML or Web API feature, so you can target browsers with confidence.