8 min read · Try CSV / JSON Converter
Start with the contract
Agree whether row one is headers, how empty cells are represented, and whether numbers stay strings until a later transform. JSON consumers often need explicit null versus missing keys.
Delimiter and quoting issues
Commas inside quoted fields are valid CSV but break naive splitters. TSV can be simpler for internal pipelines when text rarely contains tabs.
Types and locales
Dates like 01/02/2023 are ambiguous. Thousand separators and decimal commas cause import bugs—normalize in a dedicated ETL step rather than hoping JSON.parse fixes them.
Scale beyond the browser
Browser converters suit megabytes, not gigabytes. Stream large files in backend jobs and validate row counts before and after conversion.
This article is part of the DevToolsHub learning guides—original writing meant to complement our free tools, not replace official documentation from vendors or standards bodies.