Developer cheat sheets

60 searchable quick-reference sheets for the commands and syntax you look up the most. Each one runs entirely in your browser: filter by keyword or category, nothing to install, no sign-ups.

Regex cheat sheet

Searchable regex reference: tokens, quantifiers, and ready-made patterns.

Git command cheat sheet

Searchable reference of common git commands and what each one does.

Bash cheat sheet

Searchable reference of common bash shell commands and syntax.

SQL cheat sheet

Searchable standard SQL syntax reference, filter by category.

Crontab cheat sheet

Searchable cron syntax and schedule examples.

Markdown cheat sheet

Searchable CommonMark and GitHub Flavored Markdown syntax reference.

Docker cheat sheet

Searchable Docker CLI and Dockerfile command reference.

CSS Flexbox cheat sheet

Searchable CSS flexbox property reference with layout recipes.

JavaScript array methods

Searchable reference of JavaScript array methods.

HTTP headers reference

Searchable list of HTTP request, response, and security headers.

curl command cheat sheet

Searchable curl command reference with what each flag does.

Vim cheat sheet

Searchable Vim keystroke reference that runs in your browser.

CSS Grid cheat sheet

Searchable CSS Grid properties, values, and layout recipes.

kubectl cheat sheet

Searchable Kubernetes kubectl command reference.

tmux cheat sheet

Searchable tmux keybinding and command reference.

PostgreSQL cheat sheet

Searchable PostgreSQL reference: psql, queries, JSONB, and admin.

ffmpeg cheat sheet

Searchable ffmpeg command reference for audio and video.

SSH cheat sheet

Searchable SSH reference: keys, config, tunnels, and file transfers.

Common ports reference

Search well-known TCP and UDP ports by number, service, or protocol.

Python cheat sheet

Searchable Python 3 syntax reference that runs in your browser.

sed and awk cheat sheet

Searchable sed and awk one-liner reference.

PowerShell cheat sheet

Searchable PowerShell cmdlet and syntax reference.

TypeScript utility types

Searchable reference of TypeScript utility types like Partial and Pick.

Redis commands cheat sheet

Searchable reference of common Redis commands.

YAML cheat sheet

Searchable YAML syntax reference that runs in your browser.

CSS units reference

Searchable reference of every CSS unit and what each one does.

Go cheat sheet

Searchable Go language syntax reference that runs in your browser.

Rust cheat sheet

Searchable Rust syntax, ownership, and error handling reference.

Docker Compose cheat sheet

Searchable Docker Compose CLI and compose-file key reference.

Makefile cheat sheet

Search GNU make rules, variables, and functions in your browser.

JSON Schema cheat sheet

Searchable JSON Schema keyword reference.

find command cheat sheet

Searchable Linux find command reference that runs in your browser.

Emmet cheat sheet

Search Emmet HTML and CSS abbreviations and what they expand to.

Nginx config cheat sheet

Searchable nginx config directive reference with plain-English notes.

Java cheat sheet

Searchable Java syntax reference with plain explanations.

PHP cheat sheet

Searchable PHP syntax cheat sheet: arrays, strings, control flow, OOP.

C# cheat sheet

Searchable C# syntax reference: types, LINQ, records, async.

Sass and SCSS cheat sheet

Searchable Sass and SCSS syntax reference.

GraphQL cheat sheet

Searchable GraphQL schema and query syntax reference.

MongoDB cheat sheet

Searchable mongosh and query API command reference.

Terraform cheat sheet

Searchable Terraform CLI and HCL reference.

React hooks cheat sheet

Searchable list of React hooks with plain-English notes.

Ruby cheat sheet

Searchable Ruby syntax reference that runs in your browser.

Kotlin cheat sheet

Searchable Kotlin reference: null safety, collections, classes.

Swift cheat sheet

Searchable Swift syntax reference that runs in your browser.

DNS records reference

Searchable reference of DNS record types and what each one does.

HTML elements reference

Searchable reference of HTML elements by tag name and purpose.

HTTP methods reference

Searchable HTTP methods with safe, idempotent, and REST notes.

Apache htaccess cheat sheet

Searchable Apache htaccess directive reference.

JavaScript cheat sheet

Searchable JavaScript syntax reference that runs in your browser.

TypeScript cheat sheet

Searchable TypeScript syntax reference that runs in your browser.

MySQL cheat sheet

Searchable MySQL 8 command reference with plain-English notes.

systemd cheat sheet

Searchable systemctl, journalctl, and unit file reference.

Ansible cheat sheet

Search Ansible commands, playbook keys, modules, and Jinja vars.

jq JSON cheat sheet

Searchable jq filter reference that runs in your browser.

CIDR and subnetting cheat sheet

Searchable CIDR, subnet mask, IP range, and IPv6 reference.

Emacs cheat sheet

Search GNU Emacs keyboard shortcuts in a fast client-side cheat sheet.

What makes these different

Most cheat sheets are static images or long walls of text you have to scroll through. These are live: type in the filter box to jump straight to the token, command, or property you need, or tap a category to narrow the list. The full reference is baked into each page, so it works offline and sends nothing to a server. Open your browser DevTools and watch the Network tab while you type; you will see zero requests.

How to use them

Pick the sheet for the tool you are working with, then search. On the regex cheat sheet you can type lookahead to find the assertion syntax; on the git cheat sheet you can filter to the undo commands; on the SQL cheat sheet you can jump to joins. Every sheet cross-links to the matching interactive tool, so you can go from looking something up to actually running it in a click.

The full set

Regex: character classes, quantifiers, groups, lookaround, flags, and ready-made patterns.
Git: staging, branching, merge and rebase, remotes, undo, and stash.
Bash: navigation, redirection, variables, tests, loops, text processing, and jobs.
SQL: queries, filtering, joins, aggregation, data changes, schema, and set operations.
Crontab: the five fields, named shortcuts, and copy-ready schedules.
Markdown: headings, lists, links, code, tables, and GitHub extras.
Docker: images, containers, Compose, volumes, Dockerfile, and cleanup.
CSS Flexbox: container and item properties, alignment, and layout recipes.
JavaScript array methods: iterate, transform, search, sort, and reduce.
HTTP headers: request, response, caching, CORS, and security headers.
curl: methods, headers, data, auth, downloads, and debugging.
Vim: modes, movement, editing, search and replace, files, and windows.
CSS Grid: template columns and rows, sizing, placement, alignment, and layout recipes.
kubectl: get, describe, logs, apply, rollouts, contexts, and namespaces.
tmux: sessions, windows, panes, copy mode, and key bindings.
PostgreSQL: psql meta-commands, queries, types, JSONB, and admin.
npm: install, scripts, publish, inspect, and package.json fields.
ffmpeg: convert, trim, video and audio options, and GIF extraction.
SSH: connecting, key generation, config, tunnels, and transfers.
Common ports: well-known TCP and UDP port numbers by service.
Python: syntax, collections, control flow, functions, comprehensions, and files.
sed and awk: substitution, line selection, fields, patterns, and actions.
PowerShell: files, the object pipeline, variables, and flow control.
TypeScript utility types: Partial, Pick, Omit, Record, ReturnType, and more.
Redis: keys, strings, hashes, lists, sets, sorted sets, and pub/sub.
YAML: scalars, collections, multiline blocks, anchors, and tags.
grep: basic search, flags, recursive search, context, and regex.
CSS units: absolute, font-relative, viewport, layout, and functions.
Go: basics, slices and maps, control flow, structs, concurrency, and errors.
Rust: ownership, collections, traits, enums, and error handling.
Docker Compose: CLI commands and compose-file keys.
Makefile: rules, variables, automatic variables, and functions.
JSON Schema: types, string and number constraints, objects, arrays, and composition.
find: search by name, type, time, size, permissions, and actions.
Emmet: nesting, attributes, HTML and CSS abbreviations.
Nginx: server and location blocks, reverse proxy, SSL, and performance.
Java: basics, collections, control flow, OOP, methods, and exceptions.
PHP: basics, arrays, strings, control flow, functions, and OOP.
C#: types, collections, LINQ, OOP, methods, and exceptions.
Sass and SCSS: variables, nesting, mixins, functions, and modules.
GraphQL: schema, types, operations, arguments, and fragments.
MongoDB: queries, operators, updates, and the aggregation pipeline.
Terraform: CLI, state, blocks, variables, and expressions.
React hooks: state, effects, context, refs, and performance.
C++: basics, memory and pointers, containers, functions, and classes.
Ruby: basics, collections, strings, methods, and OOP.
Kotlin: null safety, collections, functions, and classes.
Swift: optionals, collections, functions, and types.
DNS records: A, AAAA, CNAME, MX, TXT, and the email and security records.
HTML elements: structure, text, media, forms, tables, and meta tags.
HTTP methods: GET, POST, PUT, PATCH, DELETE, and their semantics.
Apache htaccess: rewrites, redirects, access control, and performance.
JavaScript: basics, functions, objects, async, DOM, and modules.
TypeScript: types, interfaces, generics, and advanced type syntax.
MySQL: CLI, queries, joins, schema, and admin commands.
systemd: systemctl, journalctl logs, and unit files.
Ansible: CLI, playbooks, modules, inventory, and Jinja vars.
jq: filters, select, transform, and object construction for JSON.
CIDR and subnetting: prefixes, subnet masks, IP ranges, and IPv6.
Emacs: files, movement, editing, search, and windows.

Looking for something else? Browse all tools or the reference section.

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