How do I convert YAML to JSON?

Add your YAML file to the upload area above, then press Convert. The JSON file downloads straight to your device. You do not need an account, and there is no watermark.

Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can even disconnect from the internet after the page loads and it will still work.

Does converting to JSON reduce quality?

No. JSON is a lossless format, so the conversion preserves exactly what is in your YAML file. Note that it cannot recover detail that was already discarded when the YAML was first created — a lossless container does not undo earlier compression.

How large a file can I convert?

Up to 100 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large videos may run out of memory on a phone — those are better converted on a laptop.

DataLosslessRuns in your browser

YAML to JSON Converter

Turn YAML files into JSON in a couple of clicks. Indentation-based config format that humans actually read. The default data interchange format for APIs. The conversion is lossless — every pixel, sample or byte in the source is preserved.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

YAML files (.yaml, .yml) · up to 100 MB each

or paste files from your clipboard

Ready when you are

Drop a YAML file above and FileTools360 will turn it into JSON — right here on your device, without uploading anything.

⌘K to search converters

How to use it

1
Add your YAML files
Drag them onto the upload area, choose them from your device, or paste them from your clipboard. You can queue several at once.
2
Adjust the settings if you want to
The defaults suit most people. Open Advanced to control indentation and element names.
3
Convert and download
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

YAML and JSON explained

YAML expresses structured data through indentation rather than brackets, which makes configuration files far easier to read. It is a superset of JSON.

JSON represents structured data as nested objects and arrays. It came from JavaScript but is now the default interchange format for essentially every web API.

Where YAML files come from: CI pipelines, Kubernetes manifests, Docker Compose and application config.
Where JSON is used: APIs, configuration files and application data exports.

YAML vs JSON

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

YAML compared with JSON
Property	Source	Target
Compression	None	None
Introduced	2001	2001
Browser support	Broad in DevOps tooling.	Every modern language and tool.

YAML is stronger at: Very readable for configuration. Supports comments, which JSON does not. Anchors let you avoid repetition.
JSON is stronger at: Native support in every modern language. Handles arbitrary nesting. Distinguishes strings, numbers, booleans and null.

Why convert YAML to JSON?

People make this switch when they run into the limits of YAML: machine-to-machine data exchange, where JSON is less error-prone. JSON is the better fit when APIs, configuration and any data with structure beyond a flat table.

YAML limitations that prompt the switch: Indentation-sensitive, so whitespace errors are easy to make. Tabs are forbidden, which surprises people constantly. Unquoted values have surprising type coercion — the classic being 'no' becoming false.
What you give up: No comments allowed. Verbose for large tabular datasets.

What is preserved when converting YAML to JSON?

Both formats store the content without discarding data, so this conversion preserves it exactly. The file size may change because the two formats compress differently, but the content itself is unaffected.