Reference & Cheatsheets
427 free reference & cheatsheets tools in the Developer Tools collection — every one runs in your browser with no signup and no uploads. Page 5 of 5.
MIME Types Reference
Look up the right Content-Type for any file extension — searchable.
Git Commands Cheatsheet
The everyday Git commands, grouped and searchable — copy any one.
Linux Commands Cheatsheet
The everyday Linux terminal commands, grouped and searchable — copy any one.
Docker Commands Cheatsheet
The everyday Docker commands, grouped and searchable — copy any one.
Regex Replace Tool
Find and replace with regular expressions and capture groups.
ISO Country Codes Reference
Look up ISO 3166-1 alpha-2, alpha-3 and numeric country codes.
ISO Currency Codes Reference
Look up ISO 4217 currency codes, numbers and minor units.
International Calling Codes Reference
Find the international dialling (country) code for any country.
Time Zone List Reference
Browse IANA time zone names and their UTC offsets.
ISO Language Codes Reference
Look up ISO 639-1 and 639-2 language codes and native names.
HTML Tags Reference
Every common HTML element grouped and searchable.
File Extensions Reference
Common file extensions and what they mean — searchable.
Port Numbers Reference
Well-known TCP and UDP ports and their services — searchable.
Emoji Shortcodes Reference
GitHub and Slack emoji shortcodes — searchable, click to copy.
DNS Record Types Reference
Searchable list of DNS record types — A, AAAA, CNAME, MX, TXT and more.
Regex Syntax Reference
Searchable cheat sheet of regular-expression tokens, quantifiers and flags.
Markdown Syntax Reference
Searchable cheat sheet of Markdown syntax — headings, emphasis, lists, links and code.
Vim Commands Cheat Sheet
Searchable cheat sheet of Vim commands — modes, motion, editing, search and files.
Unicode Blocks Reference
Common Unicode blocks with their code-point ranges and contents.
HTTP Methods Reference
GET, POST, PUT and the rest — safe, idempotent, cacheable.
ASCII Control Codes Reference
The 33 ASCII control characters — abbr, caret and escape.
HTTP Status Codes Reference
Searchable list of HTTP status codes with meaning and when to use each.
ASCII Table Reference
Every ASCII code in decimal, hex, octal, binary and HTML entity — searchable, click-to-copy.
MIME Type Finder
Look up the MIME type for any file extension — or vice versa.
HTTP Headers Reference
Searchable list of HTTP request and response headers with purpose, example and direction.
Regex Cheatsheet & Tester
A categorized regex token reference plus a live, highlighting tester.
Git Command Builder
Pick an action — branch, stash, undo, rebase — and get the exact git command plus a plain-English explanation.