Generate Random YAML
Generate random YAML markup. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Generate Random YAML
- 1. Set the number of keys. Enter Number of keys to control how many top-level key-value pairs the generated YAML document contains.
- 2. Decide whether to include a nested map. Turn on Include a nested map to add an indented sub-mapping under one of the keys, useful when testing how a parser handles YAML's indentation-based nesting.
- 3. Copy the generated YAML. Copy the generated markup and paste it into a test config file, a CI pipeline example, or a documentation snippet.
When to use Generate Random YAML
Generate Random YAML produces sample YAML markup with a set number of keys and an optional nested map, useful whenever a YAML-consuming tool needs test input without writing a config by hand.
- Testing a YAML parsing library. You are building or evaluating a YAML parser and want generated documents, including ones with a nested map, to confirm the parser correctly handles indentation-based nesting rules.
- Filling a CI pipeline config example. A tutorial about GitHub Actions or similar CI tools needs a sample YAML config to show readers. Generating one with a nested map demonstrates a job's step structure.
- Seeding a config file editor demo. You are building a settings editor UI that reads and writes YAML and need sample content to preview the editor's syntax highlighting and validation before real settings load.
- Comparing YAML and TOML output for the same data. You want to compare how the same configuration structure looks in YAML versus another format, so generating a YAML sample with a matching key count gives you a fair comparison.
Examples
Random YAML with a nested map
Output
harbor: cedar delta: 482 meadow: onyx: true pearl: 17
About the Generate Random YAML tool
Generate Random YAML is a free online tool that works entirely inside your web browser. Generate random YAML markup. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 120 Random utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with 2 settings, including Number of keys and Include a nested map, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Generate Random YAML cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Does the generator send anything to a server?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How do I get a different result?
Run the generator again. Each run is computed fresh on your device, and any options you change are applied to the next result immediately.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.