JSON Formatter Pro

Format, validate, minify, compare & transform JSON. Tree view, diff viewer, sort keys, flatten, remove nulls — all in your browser.

Ctrl/⌘ + , to toggle options
Saved
Indentation
Auto Format
Show Stats
0
Keys
0
Max Depth
0 B
Size
—
Root Type
Keyboard Shortcuts
Ctrl+Enter = FormatCtrl+Shift+C = CopyAlt+1-5 = Switch tabs

◆ What it does

Format, validate, minify, compare, and transform JSON data. Includes a tree view with collapsible nodes, JSON diff comparison, and powerful transformations.

▸ How to use

  • Paste JSON in the Format tab and choose indentation (2/4/tab)
  • Switch to Tree View to explore JSON with collapsible nodes
  • Use Minify to compress JSON to a single line
  • Compare two JSON objects side by side in the Compare tab
  • Transform JSON: sort keys, remove nulls, flatten nested objects

▸ Why use this

  • Instantly format messy JSON for readability
  • Validate JSON with precise line-level error messages
  • Compare two JSON payloads to find differences
  • Transform JSON with one click — sort, flatten, clean
  • 100% client-side processing, nothing leaves your browser

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