About YAMLTool

Why we built this

YAML is everywhere — Kubernetes manifests, CI/CD pipelines, Docker Compose files, application config — but almost every tool downstream of it expects a different format. We kept reaching for the same handful of conversions (YAML to JSON, YAML to CSV, YAML to a TypeScript type) and getting frustrated with the alternatives: web tools that upload your file to an unknown server, or a five-minute detour to write and run a script for a task that should take five seconds. YAMLTool is the tool we wanted: fast, free, and built so your data never has to leave your machine.

How it works

Every converter on this site is a static, client-side application. When you paste or upload a YAML file, it's parsed and converted using JavaScript running in your own browser tab — there is no backend, no database, and no file upload involved at any point. You can confirm this yourself: open your browser's network tab while converting a file and you'll see nothing leave your device.

What we believe

• Developer tools shouldn't require an account to do something this simple.
• Your configuration files and data are yours — a converter shouldn't need to see them to work.
• A tool used for a five-second task should load fast and get out of your way.

What's next

We're actively building out more format-specific converters and related developer utilities, all under the same rule: everything runs in your browser, nothing is uploaded, and every tool stays free to use.

Get in touch

Found a bug, have a conversion edge case we should handle better, or want to request a new format? Visit our Contact page — we read every message.