Data Format Converter
These formats all describe structured data, but they disagree about shape. JSON, XML and YAML represent hierarchies; CSV and TSV represent a single flat table. Converting between the two groups therefore always involves a decision about what happens to nesting.
FileTools360 makes that decision explicit and predictable rather than silently dropping fields.
Most used data converters
All data conversions
17 supported conversions. Every one is a working converter, not a placeholder.
Data formats explained
JavaScript Object Notation
.json
The default data interchange format for APIs.
Best for: APIs · Configuration · Structured records
Extensible Markup Language
.xml
Verbose but strict hierarchical markup.
Best for: Enterprise integrations · Feeds · Document schemas
YAML Ain't Markup Language
.yaml, .yml
Indentation-based config format that humans actually read.
Best for: CI pipelines · Kubernetes · App configuration
Your data files are not uploaded to a server
Most online converters copy your file onto their own computer, convert it there and send it back — that copy is what “upload” means, and it is the part nobody explains. Nothing here does that. A CSV or JSON export is personal information in bulk — the format is boring, and what is in it usually is not. Every tool on this page runs inside the browser you are reading this in, so the file is never transmitted, never stored and never seen by anyone. Turn off your Wi-Fi and convert something anyway if you want to watch that be true.
What people actually convert here
Customer exports
every record your CRM holds, in one file
Survey responses
answers people gave on the understanding they were private
Logs and API dumps
identifiers, IP addresses, sometimes tokens
Contact exports
everyone you know, with their phone numbers
Hierarchical and tabular data
JSON, XML and YAML can nest arbitrarily: an object inside an array inside an object. CSV has rows and columns and nothing else.
Flattening turns nested keys into dotted column names, so an address object becomes address.city and address.zip. It is reversible by eye and predictable, but irregular data produces a sparse table with many empty cells — which is a sign the data probably should not be a table at all.
Choosing between JSON, XML and YAML
JSON is the default for APIs: compact, unambiguous, and natively supported everywhere. Its weaknesses are verbosity for large tables and the absence of comments.
YAML is for configuration a human will edit. It supports comments and reads cleanly, at the cost of indentation sensitivity and some famously surprising type coercion.
XML is heavier but supports schema validation and namespaces, which is why it persists in enterprise integrations and document formats.
FAQ