JSON / YAML / CSV Converter

Free tool No sign-up

Input

Output

{
  "id": 42,
  "name": "Ada Lovelace",
  "email": "[email protected]",
  "active": true,
  "roles": [
    "admin",
    "editor"
  ],
  "address": {
    "city": "London",
    "zip": "EC1V"
  }
}

IndentSort keysMinify192 bytes · 14 lines · 2 objects · 1 arrays · 8 keys

About this tool

Convert between JSON, YAML, and CSV in one tool. All 9 conversions, with options for indent, sort keys, YAML quote style, CSV delimiter, nested-object flattening and more.

Why use this formatter?

⚡

Three formats, one paste

JSON, YAML, and CSV in one tool. Switch the output format with a tab — no re-paste, no second tool, no chat round-trip.

🔒

100% in-browser

Your data never leaves the page. Safe for production payloads, customer exports, internal API responses — anything you wouldn't paste into a chat.

🎛️

Real options for each format

Indent / minify / sort keys universally. Plus YAML flow style, quote style, anchors. Plus CSV delimiter, headers, type coercion, nested-object flattening.

↔️

All 9 conversions covered

JSON ⇄ YAML ⇄ CSV ⇄ JSON, every direction. Auto-detect the input format or override it. Live conversion as you type.

▶

How to use

Paste any JSON, YAML, or CSV

Drop it into the left panel. The tool auto-detects the format — override with the input tabs if needed.

Pick an output format

Click JSON / YAML / CSV on the right pane. Same input, three outputs — no need to re-paste.

Tweak the options

Open "Format-specific options" to control YAML quote style, CSV delimiter, header rows, nested-object flattening and more.

Copy or download

Hit Copy to grab the output, Download to save as a .json / .yaml / .csv file, or Share to send the input via a URL hash.

⇄

Three formats at a glance

Format	Best for	Options that matter
`JSON`	API payloads, config files	Indent, sort keys, minify
`YAML`	Config (Kubernetes, GitHub Actions, Docker Compose)	Flow vs block, quote style, anchors
`CSV`	Spreadsheets, data exports	Delimiter, header row, type coercion, flatten nested objects

Same data, three formats

JSON

{
  "name": "ada",
  "active": true,
  "skills": ["rust", "css"]
}

YAML

name: ada
active: true
skills:
  - rust
  - css

CSV

name,active,skills
ada,true,"[""rust"",""css""]"

✦

Pro tips

Use auto-detect for unknown input

The tool inspects the first character and structure to guess JSON / YAML / CSV. If you know what you have, override with the explicit tab — saves a misdetection on edge cases (e.g. YAML that starts with a quoted string).

CSV → JSON: enable type coercion

Turn on "Coerce types on parse" so "true" becomes the boolean true and "42" becomes the number 42. Disable it if you have IDs that start with leading zeros (otherwise "007" becomes 7).

YAML quote style for config files

For Kubernetes / Docker / CI configs, "double" is the safe default — preserves escape sequences. Use "force" when emitting YAML for downstream parsers that are picky about unquoted strings.

JSON → CSV: flatten nested objects

Enable flattening to turn { user: { name: "Ada" } } into a column "user.name" with value "Ada". Without it, nested objects would JSON-stringify into a single cell.