Best Free JSON to YAML Converter
Convert JSON to YAML and back in your browser, with correct types, nesting and a clear error on bad input.
100% free
No signup
No watermark
Files processed in memory, never stored
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How it works
- Paste your data. Drop JSON or YAML into the input box.
- Pick a direction. Click JSON → YAML or YAML → JSON; the converted text appears below.
- Copy the result. Hit Copy. Everything runs in your browser — nothing is uploaded.
About this tool
Turn JSON into clean, indented YAML and convert YAML straight back to JSON, without anything leaving your machine. Paste a document, pick a direction, and the result appears instantly with proper nesting, quoting and types preserved. Developers use it to port a config between a JSON API and a YAML file (Kubernetes manifests, CI pipelines, Docker Compose, Ansible) or just to read a dense JSON blob as friendlier YAML. Invalid input is flagged with a clear error, and Advanced options let you switch the indent between 2 and 4 spaces.
What people use it for
- Convert a JSON config to a YAML manifest (Kubernetes, CI, Compose)
- Turn a YAML file back into JSON for an API or script
- Read a dense JSON payload as friendlier indented YAML
- Reformat and validate a config snippet on the fly
Frequently asked questions
Yes. JSON → YAML and YAML → JSON are separate buttons, so you can go in either direction with the same tool.
Yes. Objects, arrays, strings, numbers, booleans and null all round-trip; ambiguous strings like "0123" or "yes" are quoted in YAML so they do not change type on the way back.
No. The conversion runs entirely in your browser with a built-in parser and emitter, so nothing you paste is uploaded anywhere.
You get a clear error message naming the problem instead of silent, broken output.
Yes — open Advanced options to switch between 2-space and 4-space indenting.
Completely free, no account, no limits — a client-side tool with nothing to meter.
Yes. It runs in your browser, so JSON to YAML Converter works on phones and tablets as well as desktop — there is no app to install.
Usually just a few seconds for a typical file — JSON to YAML Converter starts working the moment you give it your input.
Casual use is unlimited, under a generous fair-use cap that keeps it fast for everyone.
All modern browsers — Chrome, Safari, Firefox and Edge. JSON to YAML Converter needs nothing installed beyond the browser you already use.