Developer Cheat Sheets

Cron Syntax Cheat Sheet (Scheduled Tasks) →

A cron syntax cheat sheet with the five fields, special characters, common examples, and shortcut strings explained.

CSS Color Names (Hex and RGB) →

The full list of CSS color names with a swatch, hex code, and RGB values for each, ready…

CSS Flexbox Cheat Sheet →

A CSS Flexbox cheat sheet: every container and item property with its values, and how to center content.

CSS Grid Cheat Sheet →

A CSS Grid cheat sheet: container and item properties, fr units, minmax, repeat, and auto-fit, with a responsive…

Date and Time Format Cheat Sheet (strftime) →

A strftime cheat sheet: date and time format codes like %Y, %m, and %H, with examples and ready-made…

Docker Commands Cheat Sheet →

A Docker commands cheat sheet: images, containers, Compose, volumes, and cleanup, each explained in one line.

Git Commands Cheat Sheet →

A quick Git commands cheat sheet: setup, clone, stage, commit, branches, remote, and undo, each explained in one…

HTML Entities Reference (Special Characters) →

A reference list of HTML entities with their named and numeric codes, for symbols, punctuation, currency, math, and…

HTML Tags List and What They Do →

An HTML tags reference: the most-used tags grouped by purpose, from structure and text to forms and semantic…

HTTP Headers Reference →

A reference of common HTTP request and response headers with their meanings and an example of each.

HTTP Status Codes Cheat Sheet →

The complete list of HTTP status codes, from 1xx to 5xx, with plain-English meanings, grouped for quick reference.

JavaScript Array Methods Cheat Sheet →

JavaScript array methods at a glance: map, filter, reduce, find, sort, and more, noting which ones change the…

JavaScript String Methods Cheat Sheet →

JavaScript string methods at a glance: search, slice, split, replace, trim, pad, and case conversion, with the key…

Linux Commands Cheat Sheet (Bash) →

A quick Linux and Bash commands cheat sheet: files, search, permissions, processes, system, and network basics.

Markdown Cheat Sheet →

A quick Markdown cheat sheet: headings, emphasis, lists, links, images, code, quotes, and tables, with what each does.

Media Types List (MIME Types) by File Extension →

A MIME types list: common Content-Type values for text, images, audio, video, fonts, and documents, with their file…

Number Bases Table (Binary, Octal, Hex, Decimal) →

A conversion table of 0 to 255 in decimal, binary, octal, and hexadecimal, with a short explanation of…

Regex Cheat Sheet →

A quick regex cheat sheet: character classes, anchors, quantifiers, groups, lookaround, and flags, each with an example.

SQL Cheat Sheet (Common Queries) →

A quick SQL cheat sheet: queries, filtering, joins, aggregates, and data changes, each with a short explanation.

Vim Cheat Sheet →

A Vim cheat sheet: modes, movement, editing, search and replace, and how to quit, save, copy, and paste.