Data & text converter
Convert structured data and text formats without pasting them into a website.
About data & text conversion
Data files are where pasting into a random website is riskiest, because they so often contain customer records, credentials or internal figures. These conversions are plain JavaScript running in the page — nothing is transmitted, and nothing is logged.
Types are not guessed
Converting CSV to JSON produces every value as a string. That looks pedantic until a leading-zero postcode, a long ID or a version number gets silently mangled into a number by a tool that tried to be clever. Nothing here does that.
Structure that does not survive flattening
JSON to CSV writes every key found anywhere in the array as a column, so records of differing shapes still line up. Nested objects and arrays cannot become columns, so they are written as JSON text inside their cell rather than being dropped.
Base64 is not security
Base64 is an encoding, not encryption — anyone can decode it instantly, and it makes the content about a third larger. It exists to carry data safely through channels that only handle plain text, nothing more.
Data & Text questions
Is this data & text converter free?
Yes — no accounts, no daily quotas, no watermarks and no paid tier.
Are my files uploaded anywhere?
No. Every conversion on this page runs inside your own browser, so the file is never transmitted to us or to anyone else.
Do I need to install anything?
No. Everything runs in the page using your browser's own capabilities and open-source engines compiled to WebAssembly.