Developer Cheat Sheets
Fast, clean, printable syntax references for JSON Schema, SQL query conventions, and regular expressions. 100% free, no email or signup required.
JSON Schema Cheat Sheet
A quick printable reference guide for JSON Schema types, validation rules, object & array constraints, and schema composition keywords.
SQL Style Guide & Formatting Rules
Industry best practices for writing clean SQL queries: keyword casing, indentation standards, table aliases, and JOIN structures.
Regular Expressions Cheat Sheet
Quick syntax reference for RegExp matching, quantifiers, anchors, lookahead/lookbehind assertions, and standard validation snippets.
HTTP Status Codes & Headers Reference
A quick reference guide for HTTP response codes, REST API conventions, and essential HTTP request/response headers.
Git Commands & Workflow Reference
A fast reference guide for daily Git commands: branch management, interactive rebasing, stashing, and safe commit recovery.
Cron Syntax & Schedule Reference
A complete cheat sheet for cron time fields, special characters (*, /, -, ,), and common schedule expressions.
Docker CLI & Docker Compose Cheat Sheet
A quick reference guide for everyday Docker commands, multi-stage Dockerfile patterns, container debugging, and Docker Compose workflows.
Linux File Permissions & Chmod Guide
A complete guide to understanding Linux permissions: user/group/other breakdown, octal number math (755, 644, 400), and permission fixing recipes.
Bash Scripting & CLI One-Liners Cheat Sheet
A fast reference guide for writing clean Bash shell scripts: parameter expansion, exit code handling, loops, string operations, and pipes.
Kubernetes kubectl CLI Cheat Sheet
A complete reference for Kubernetes administrators and developers: pod logs, exec debugging, port forwarding, rollout status, and context switching.
CSS Grid & Flexbox Reference Guide
A fast cheat sheet for CSS Flexbox and CSS Grid layout properties, axis alignments, responsive auto-fit patterns, and shorthand properties.
PostgreSQL Performance & Indexing Cheat Sheet
A practical performance tuning guide for PostgreSQL database engineers: query plan analysis, index types, connection pooling, and configuration tuning.