How to Convert YAML to an HTML Table
You maintain data in YAML because it's easy to edit, but showing it on a web page means turning it into a table. This converter does it instantly. It parses your YAML with a real parser — handling block and flow style, quoted strings and comments — then flattens a list of mappings into a clean, semantic HTML table. It scans every record to build one set of columns, so entries with slightly different fields still line up, with blanks for the gaps. Values are HTML-escaped, nested structures are shown as compact JSON, and you can add a CSS class to match your framework. A live preview shows the rendered result. Copy or download. Everything runs in your browser, so nothing is uploaded.
Paste your YAML
Paste a list of mappings or load the sample; it's parsed locally with nothing uploaded.
Style the table
Add a CSS class and toggle the header row and minify.
Copy or download
Grab the HTML with one tap or save it as an .html file.
YAML vs HTML Tables — What's the Difference?
YAML — YAML Ain't Markup Language
A human-friendly, indentation-based format that's easy to write and read. It's ideal for configuration and hand-authored records, but a browser won't render it as a table — it's the data, not the display.
HTML table markup
A set of table, thead, tbody, tr, th and td elements that browsers render as a real, styleable grid. Converting YAML to HTML turns your records into a table people can see, style and interact with.
Common Use Cases
Show YAML data on a page
Turn a YAML dataset into a table you can paste straight into a web page.
Docs & blogs
Embed data tables in articles and documentation from a YAML source.
Config display
Render a YAML config or data file as a readable table for review.
Framework-ready
Add a Bootstrap or Tailwind class so the table matches your design instantly.
Reports
Drop YAML records into internal reports and static dashboards.
Email tables
Produce simple semantic tables for HTML emails from YAML data.
Prototyping
Mock up data tables with real YAML while building a UI.
Quick inspection
See a YAML list as a rendered grid to understand its shape.
Tips & Best Practices
Use a list of mappings
A top-level YAML list where each item is a mapping converts most cleanly — each becomes a row.
Use a framework class
Add your table class so the output matches your existing design with zero extra CSS.
Keep keys consistent
Consistent key names across records keep the columns tidy; differing keys are unioned with blanks.
Minify for production
Use minified output when embedding in a live page, and pretty output when you'll edit by hand.
Flatten nested data first
Deeply nested values are shown as JSON text; flatten them beforehand for separate columns.
Troubleshooting
It says expected a list of mappings
The tool needs a YAML mapping or a list of mappings. A bare list of scalars has no columns to build a table from.
The structure looks wrong
Almost always an indentation problem. Use consistent spaces (not tabs) so the YAML parses into the records you expect.
The table isn't styled
Raw HTML tables are unstyled by default. Add a CSS class matching your framework or wrap the output in your own styles.
A cell shows JSON text
That value was a nested mapping or list, kept as compact JSON so nothing is lost. Flatten it first for separate columns.
Frequently Asked Questions
How do I convert YAML to an HTML table for free?
Paste your YAML list of mappings above and semantic HTML table markup appears instantly, with a live preview. Copy it or download an .html file — free, no signup.
What YAML shape does it expect?
A list of mappings works best, where each mapping is a row. A single mapping is treated as one row too.
What if my records have different keys?
Every key across all records becomes a column, and any record missing a key gets an empty cell so the table stays aligned.
Does it create a proper thead?
Yes. With the header option on, the keys become th cells inside a thead and each record becomes a tbody row.
Can I add a CSS class?
Yes. Enter any class names — like 'table table-striped' — and they're added to the table element.
Is my data HTML-escaped?
Yes. Ampersands and angle brackets in your values are escaped so they display as text and can't break your page.
How are nested values handled?
Nested mappings and lists are shown as compact JSON inside the cell so no information is lost.
Does it support flow style?
Yes. Inline flow collections like [a, b] and { x: 1 } are understood alongside block style.
Can I get minified HTML?
Yes. Turn on minify for compact markup with no extra whitespace, ideal for production pages.
Is there a live preview?
Yes. The rendered table is shown right below the markup so you can see exactly what you'll get.
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 an .html file, or copy it straight to your clipboard.
Will it work with Bootstrap or Tailwind?
Yes. Add the relevant class names and the generated table slots straight into your framework's styles.
What if my YAML is invalid?
You'll get a clear message instead of broken output. The usual culprits are inconsistent indentation or an unclosed quote.
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 YAML to HTML Converter
Written and maintained by the FlipMyFormat team · Runs entirely in your browser