cheat sheets
Developer Cheat Sheets
A curated directory of the best free programming cheat sheets — the quick references worth keeping open in a second tab. Every link is hand-picked and checked: modern, maintained, and genuinely useful. No dead PDFs, no archived junk.
Nobody memorizes everything — good developers just know where to look. This is that place. Instead of one endless unmaintained list, each topic below is a short, curated set of the references professionals actually use, from the canonical CSS layout guides to the terminal tools that fetch a cheat sheet for any command. Pick a topic and dive in.
CODE & WEB
Languages & the web
Syntax and framework references for writing code.
DATA
Databases, data & theory
Querying, wrangling, and the CS fundamentals for interviews.
ENVIRONMENT
Platforms, editors & tools
The commands and shortcuts for where you actually work.
SPECIALIZED
Media, security & more
The references for specific crafts — and the catch-all hubs.
- Media & Graphics →FFmpeg and ImageMagick — the command-line Swiss Army knives for audio, video, and images.2 references
- Security →The OWASP Cheat Sheet Series, Nmap, and regex.3 references
- Project Management →The Scrum Guide, Markdown, and Git for collaboration.3 references
- The Everything Sheets →cheat.sh, Devhints, QuickRef, and Learn X in Y Minutes — the universal collections.4 collections