PrettifyPrettify

View, validate, and
transform any data format.

A beautiful, distraction-free viewer for JSON, YAML, CSV, XML, and Mermaid. Paste your data and explore it instantly. No sign-up needed — your documents stay on your device.

⌘Vpaste⌘Kcommands⌘Dtheme
{
"company": "Acme Corp",
"founded": 2019,
"active": true,
"employees": [
{
"id": 1,
"name": "Alice Johnson",
"role": "CEO",
"salary": 185000
},
{4 keys},
{4 keys}
]
}
Try jq— 90+ builtins, live
$
3

5 formats, one tool

Built for developers

Every feature designed around the workflows developers actually use.

6 View Modes

Tree, Raw, Table, Diagram, Chart, and Preview — switch instantly.

Query Tools

jq for JSON/YAML, SQL for CSV, XPath for XML — built in.

Diff & Compare

Side-by-side version comparison with word-level highlighting.

Format Conversion

Convert between JSON, YAML, CSV, and XML in one click.

Command Palette

Press ⌘K to access any action. Keyboard-first design.

Desktop App

Native macOS app via Tauri with file associations.

Blazing Fast

Virtualized rendering handles 100K+ line files smoothly.

Local processing

Parsing, editing, and queries run in your browser. Your documents stay on your device.

Power tools for power users

Everything you need to work with data, built in.

Type Generation

Paste JSON, get TypeScript. Or Go, Kotlin, Rust, JSON Schema — generated instantly.

Input
{
  "id": 42,
  "name": "Ada",
  "active": true,
  "roles": ["admin", "user"]
}
Output · TypeScript
export interface User {
  id:    number;
  name:  string;
  active: boolean;
  roles:  string[];
}

Free vs Pro

Free is generous. Pro is everything.

Free

Everything you need to get started

5 formats (JSON, YAML, CSV, XML, Mermaid)
Tree, Raw, Table views
Syntax highlighting & validation
Search & Replace with regex
Format conversion
Unlimited tabs
Share via compressed URL (up to ~32 KB)
Unlimited-size share links (short URLs)
jq Query Engine (90+ builtins)
SQL Query Panel
XPath Query Panel
JSON Schema Validation
Diagram view & multi-column charts
Diff & Compare
Split view (side-by-side panes)
Full history (30 docs, 50 versions)
All future features
Recommended

Pro

One-time payment, yours forever

$19.99

5 formats (JSON, YAML, CSV, XML, Mermaid)
Tree, Raw, Table views
Syntax highlighting & validation
Search & Replace with regex
Format conversion
Unlimited tabs
Share via compressed URL (up to ~32 KB)
Unlimited-size share links (short URLs)
jq Query Engine (90+ builtins)
SQL Query Panel
XPath Query Panel
JSON Schema Validation
Diagram view & multi-column charts
Diff & Compare
Split view (side-by-side panes)
Full history (30 docs, 50 versions)
All future features

Pricing

One-time payment. Yours forever.

Every future feature included — no subscriptions, no recurring fees.

$19.99lifetime
All Pro features, forever
Every future update included
No subscriptions, no recurring fees
30-day money-back guarantee

FAQ

Frequently asked questions