References tools
16 references utilities — 16 live so far.
16 of 16 live · the rest ship in waves, each unit-tested in public.
Reference sheets & lookups16
- ASCII and Unicode table
Searchable character reference
- Common ports
Service to port lookup
- Country codes
ISO 3166 plus dialing codes
- Currency codes
ISO 4217 with symbols
- Git cheatsheet
Common workflows and fixes
- HTML entities list
Searchable with copy buttons
- HTTP status codes
Every code explained with examples
- JS key codes
Press a key, see event.key and event.code
- Linux commands
Everyday ops reference
- Markdown cheatsheet
With live preview
- MIME types
Extension to content-type lookup
- Paper sizes
A-series, Letter, Legal in mm and px
- Regex cheatsheet
Patterns organized by task
- Social image sizes
All platforms, kept current
- SQL cheatsheet
Joins, windows, dates
- Timezone list
IANA zones with current offsets