Learning & reference

Look up file extensions and their content types

Grade point average on the 4.0 scale from courses and credits

Look up named entities, characters, and numeric codes

What you need on the final exam to hit your target grade

Search and browse 60+ common emojis by name or category

Estimate revision hours needed per subject from exam dates and how confident you feel, using a simple stated heuristic

Look up ISO 639-1 and ISO 639-2 codes for 55+ languages

Format one reference in APA, MLA, Harvard and Chicago style from the same author, title and source fields

Look up hotkeys for VS Code, Chrome, terminal, and git

Count words, characters and estimated pages in an essay against a target length, with a reading time estimate

Find ISO 3166 alpha-2, alpha-3, and international dialing codes

Compare buying against renting a textbook across a number of terms, including resale value

Look up ISO 4217 codes, symbols, and names for 40+ world currencies

Work out your attendance percentage so far, and how many more sessions you can miss and still hit a target

Look up the common Git command for a task, described in plain words rather than git jargon

Work out an overall grade from weighted assessments, and what score is still needed on the rest

Look up the KeyboardEvent.key, .code and legacy numeric .keyCode for a keyboard key, searchable by any of them

Look up the common shell command for a task, described in plain words

Look up an IANA timezone name, its current UTC offset and the current local time, computed live so daylight saving is always correct

Look up regex syntax by what it matches, plus a handful of common ready-made patterns

Look up a CSS unit, what it is relative to, and when to reach for it

Look up an SQL clause or join type, what it does, and a short worked example

Look up ASCII 0-127 and the printable Latin-1 Supplement (160-255) in decimal, hex, octal and binary

Decode classic pager codes or turn text into multi-tap phone-key sequences

Format cues, notes and a summary into the Cornell note-taking structure

Arrange an experiment hypothesis, method, observations and conclusion as Markdown

List notes and scale degrees for a root note and common scale pattern

Build diatonic triads from a key and scale-degree sequence

Transpose chord symbols in a chord sheet by a chosen number of semitones

Compare physical dimensions for standard, micro and nano SIM cards