Format rules
- Rows should have consistent columns
- Quote fields containing commas
- Escape quotes by doubling them
Valid example
name,email "Ada, Jr.",ada@example.com
Invalid example
name,email Ada, Jr.,ada@example.com
Common errors
- Assuming CSV accepts syntax from a similar format
- Using the wrong encoding or line ending
- Copying invisible characters from rich text
- Testing only the happy path and not parser errors
Online validation and conversion
Compared with nearby formats
CSV should be chosen for the parser and ecosystem that will consume it. Prefer strict formats for APIs, human-friendly formats for ops config, and signed formats only when verification is required.