How to Convert CSV to YAML
CSV is easy to export from any spreadsheet, but YAML is far nicer to read and is the default for modern configuration. This converter bridges the two properly. It reads your CSV with a real RFC-4180 parser, so quoted fields, commas inside values and escaped quotes are handled correctly rather than naively split. The first row supplies the keys, and each remaining row becomes a YAML list item. Turn on type detection and numbers, booleans and null become real YAML values instead of strings, while anything that could be misread — a value with a colon, a leading zero, or one that looks like a keyword — is quoted automatically so the YAML always parses back to the same data. The result is cleanly indented and standards-compliant. Pick your delimiter, then copy or download. Everything runs in your browser, so nothing is uploaded.
Paste your CSV
Paste your data or load the sample; it's parsed locally with nothing uploaded.
Choose the options
Set the delimiter and toggle type detection to taste.
Copy or download
Grab the YAML with one tap or save it as a .yaml file.
CSV vs YAML — What's the Difference?
CSV — comma-separated values
A flat, spreadsheet-friendly table format where each line is a row and a delimiter separates columns. It's compact but has no types and no nesting — everything is plain text.
YAML — YAML Ain't Markup Language
A human-friendly, indentation-based format that keeps types while staying easy to read. It's the default for configuration. Converting CSV to YAML turns a flat table into a clean, typed list of records.
Common Use Cases
Build config from a sheet
Turn a spreadsheet of settings into a readable YAML config file.
Seed data files
Produce YAML fixtures and seed data from CSV exports.
DevOps pipelines
Bring tabular data into YAML-based CI/CD and infrastructure files.
Readable records
Convert a flat table into a list of records that's easy to scan and edit.
Static site data
Feed YAML data files to static-site generators from a spreadsheet.
Documentation
Show example data as clean YAML rather than a raw table.
European CSVs
Use the semicolon delimiter for exports from comma-decimal locales.
Quick transforms
A fast, no-install way to turn a CSV into YAML.
Tips & Best Practices
Keep a clean header row
Header names become YAML keys, so clear, simple names give the tidiest output.
Match the delimiter
Choose comma, semicolon or tab to match your source; European exports often use semicolons.
Use type detection wisely
Great for numeric data, but turn it off if identifiers like 007 must stay exact strings.
Trust the quoting
Values with colons, leading zeros or keyword-like text are quoted automatically so YAML stays valid.
Verify it round-trips
Paste the YAML into a parser to confirm it reads back to the same records.
Flatten complex values
CSV cells are flat text; if you need nested YAML, structure the data before converting.
Troubleshooting
Columns split wrongly
Your file may use a different delimiter. Switch between comma, semicolon and tab to match the source.
Numbers stayed as strings
Enable type detection. Values with leading zeros or extra characters are kept as strings to avoid data loss.
A value got quotes
That's intentional — values with colons, special characters or keyword-like text are quoted so the YAML parses correctly.
Need a header row
This converter uses the first row as keys, so include a header row above your data.
Frequently Asked Questions
How do I convert CSV to YAML for free?
Paste your CSV above and clean YAML appears instantly, one list item per row. Copy it or download a .yaml file — free, no signup.
Does it handle quoted commas?
Yes. A real RFC-4180 parser keeps commas, quotes and line breaks inside quoted fields intact instead of naively splitting.
What YAML shape do I get?
A list of mappings: each row becomes a list item whose keys are your header names.
Does it detect data types?
Yes. With type detection on, numbers, booleans and null become real YAML types instead of strings.
Why did a value get quotes?
Values that could be misread — with colons, leading zeros or keyword-like text — are quoted so the YAML parses back correctly.
Can I keep everything as strings?
Yes. Turn off type detection to preserve every value exactly as text, useful for IDs with leading zeros.
Which delimiters are supported?
Comma, semicolon and tab, so you can convert standard CSV, European semicolon files and TSV.
Do I need a header row?
Yes. The first row supplies the keys, so include a header above your data.
Is the output valid YAML?
Yes. It's standards-compliant YAML that any parser or config loader will accept.
How is indentation handled?
Records and fields use consistent two-space indentation, keeping the output tidy and diff-friendly.
What happens to empty fields?
They become empty strings so every record keeps the same set of keys.
Is my data sent to a server?
No. Everything happens inside your browser, so your data never leaves your device.
Can I download the result?
Yes. Save the output as a .yaml file, or copy it straight to your clipboard.
How large a file can it handle?
It comfortably converts thousands of rows, all within your browser.
Can I convert YAML back to CSV?
Yes — use our YAML to CSV converter for the reverse direction.
Does it preserve Unicode?
Yes. Any Unicode characters in your data are preserved in the YAML output.
Can it produce nested YAML?
CSV cells are flat, so the output is a flat list of mappings. Structure your data first if you need nesting.
Does it work on phones?
Yes, in any modern browser on Windows, Mac, Android or iPhone with nothing to install.
Is this converter really free?
Completely free, forever — no account, no ads and no premium wall.
100% free · No signup · Processed in your browser · Data never sent
Last updated: August 2026 · FlipMyFormat CSV to YAML Converter
Written and maintained by the FlipMyFormat team · Runs entirely in your browser