CSV is the simplest possible tabular file format: one row per line, values separated by commas — the universal export/import format for spreadsheets and databases.
Also called: comma-separated values · .csv
CSV is defined by RFC 4180, but in practice every tool bends the spec. Common variants use semicolons or tabs as separators, different quoting rules, and different line endings.
Because CSV has no schema, dates, booleans, and leading zeros all round-trip as strings. That's why phone numbers and ZIP codes often lose their leading zero when opened in Excel — the app guesses 'number' and drops it.
For anything richer than a flat table, prefer JSON, Parquet, or a proper database export.
Base64 is an encoding that turns any binary data — images, files, credentials — into a string of 64 safe ASCII characters that can travel through text-only systems.
A JWT is a compact, URL-safe token made of three Base64 parts — header, payload, signature — used to prove who is making an API request.
A regex is a mini-language for describing text patterns — used to find, validate, or replace substrings in a larger body of text.
Cron is a Unix scheduler that runs commands on a recurring timetable — every minute, every Monday at 6 AM, the first of every month, and so on.