Cheat Sheets
Dense, practical references designed for daily lookup. Each sheet fits on one page when printed, links to the live tool for trying patterns, and covers the syntax you actually use — not every obscure edge case. Free, no signup, printable.
Regex Cheat Sheet — Complete Reference (PCRE, JavaScript, Python)
Complete regular expression cheat sheet with every anchor, character class, quantifier, group, and flag — plus 30+ ready-to-use patterns for emails, URLs, dates, and more.
HTTP Status Codes Cheat Sheet — All 70+ Codes Explained
Complete HTTP status code reference with all 1xx, 2xx, 3xx, 4xx, 5xx codes, when to use each, common causes, and practical examples. Bookmark for debugging.
Markdown Cheat Sheet — Complete Syntax Guide (GFM + CommonMark)
Full Markdown syntax reference: headings, emphasis, lists, links, images, tables, code blocks, task lists, footnotes, and all GitHub Flavored Markdown extensions. Free, bookmarkable.
Git Cheat Sheet — Complete Command Reference (Daily Use)
Practical Git cheat sheet covering everything from clone/commit to rebase, cherry-pick, bisect, and recovery. Free, bookmark-friendly, with real-world examples.
SQL Cheat Sheet — Complete Reference (Postgres, MySQL, SQLite)
Practical SQL cheat sheet: SELECT, JOIN, GROUP BY, window functions, CTEs, indexing. Works for Postgres, MySQL, SQLite. Free, dense, with worked examples.
CSS Selectors Cheat Sheet — Complete Reference with Examples
Every CSS selector that matters: type, class, ID, attribute, pseudo-class, pseudo-element, combinators. Free, with specificity rules and real-world patterns.
Linux/Bash Commands Cheat Sheet — Daily Terminal Reference
Practical Linux/bash command reference for daily terminal use: file ops, text processing, processes, networking, permissions. Free, dense, with real examples.
Vim Cheat Sheet — Modes, Motions, Edits, Search/Replace
Practical Vim cheat sheet: modes, motions, edits, search/replace, buffers, splits, visual mode. Free, dense, with the commands you actually use.
Need the tool, not the reference?
Most cheat sheets link straight to an interactive tool — test regexes, decode JWTs, format markdown — right in your browser.
Browse All Tools →