YAML Parser

Name: YAML Parser — JSONWorks
Author: Abhay Darji

Parse YAML and inspect the resulting structure, types and statistics.

100% client side No upload No size limit Works offline

Input

Output

Ready

Drop a file to load it

About this tool

Parse a YAML document and see what it actually produces — resolved values, types and a breakdown of the structure.

When you would use it

Checking how a value is interpreted
Counting elements before processing a document
Confirming a document parses at all

Worked example

YAML

id: 4815
name: Ada Lovelace
active: true
score: 91.5
roles:
  - admin
  - editor
address:
  city: London
  postcode: NW1

Parsed

{
  "id": 4815,
  "name": "Ada Lovelace",
  "active": true,
  "score": 91.5,
  "roles": [
    "admin",
    "editor"
  ],
  "address": {
    "city": "London",
    "postcode": "NW1"
  }
}

Things worth knowing

YAML resolves unquoted scalars aggressively: no is a boolean, 1.10 is a number and 2026-09-13 may be read as a date. The parser shows exactly what each value became.

Questions

Frequently asked

What is the difference between parsing and validating?

Validation tells you whether the document is well-formed. Parsing shows you the value it produces, which is where surprises like unexpected type coercion show up.

Is my data uploaded anywhere?

No. Every tool on JSONWorks runs entirely in your browser using JavaScript. Your input is never sent to a server, never logged and never stored. The simplest proof is to disconnect from the internet — the tools keep working. The site does load Google Fonts and a Google Analytics page-view tag, so you will see those two requests in your network tab, but neither receives anything you type or paste.

Does it work offline?

Yes. JSONWorks is installable as a progressive web app and caches itself on first visit, so every tool keeps working without a connection.