Convert TSV to YAML Online

TSV to YAML is mostly used to turn a table into configuration or metadata. Snakemake workflows commonly keep a samples.tsv next to a config.yaml, and moving part of a sample table into the config is a routine step. Outside science, a tab-separated list copied from a spreadsheet can become a YAML list for Ansible, Kubernetes values or a static site.

Each TSV row becomes one item in a YAML list, with the header names as keys. The output uses two-space indentation, never tabs, because YAML forbids tab characters for indentation. Values are never wrapped, so each field sits on one line. Keys keep the exact header text, so a header such as Sample ID becomes a key with a space in it, which YAML allows but some tools make awkward to reference.

Watch how IDs are typed. A sample column holding 1, 2 and 3 is read as integers and written as bare YAML numbers, which a tool expecting string IDs may reject. IDs with leading zeros, such as 001, are safer: the column is read as text, and 001 is quoted so it loads back as a string. Headerless files produce keys like column0 and column1, which make a poor config, so add a header line before converting.