Compare Two JSON Files Side by Side

Compare large and complex JSON files with a side-by-side editor built for precision. Instantly identify added, removed, and modified fields with line-level highlighting, synchronized navigation, and live change tracking designed for real-world API and data workflows.

JSON Comparison

Enter JSON in both editors to see the comparison.
Click anywhere or press any key to enable all 0 editors with syntax highlighting
Ln 1, Col 1
Size: 0 B
5.0(3 ratings)
Click anywhere or press any key to enable all 0 editors with syntax highlighting
Ln 1, Col 1
Size: 0 B
5.0(3 ratings)

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JSON Compare Tool for Large Files – Side by Side Diff Viewer

Side-by-side JSON comparison tool built for large files and complex structures. Detect added, removed, and modified fields with live highlighting, synchronized scrolling, and precise change navigation.

Key Features of OJF

Take control of your data - everything in one place

Side-by-Side JSON Difference Analysis

  • Dual editor layout for comparing original and modified JSON simultaneously
  • Line-level difference detection with clear visual separation of changes
  • Color-coded highlights for added, removed, and modified lines
  • Glyph margin indicators (+, −, ~) for quick change recognition

Live Comparison & Change Navigation

  • Real-time diff updates while editing either JSON panel
  • Jump to next and previous differences with automatic scrolling
  • Animated focus on changed lines to reduce visual scanning effort
  • Difference counter showing totals for added, removed, and modified lines

Built for Large & Complex JSON Files

  • Optimized comparison for deeply nested objects and large datasets
  • Stable performance when comparing heavy API responses and data exports
  • Cursor position tracking with line and column indicators for both editors
  • Synchronized scrolling to keep structures aligned during review

How to Compare Large JSON Files Online

1

Paste or load the original JSON into the left editor panel

2

Paste or load the modified JSON into the right editor panel

3

Review highlighted differences showing added, removed, and modified lines

4

Use next and previous controls to jump between detected changes

5

Track change counts and cursor positions while reviewing updates

6

Make corrections directly during comparison and re-evaluate changes live

Why Choose Us?

Feature
Online JSON Formatt(OJF)
Other Tools
Side-by-side editor viewDedicated dual-panel JSON editorsSingle-pane or inline comparison
Change visibilityLine-level highlights with glyph indicatorsText-only or minimal highlighting
Large file handlingDesigned for heavy and deeply nested JSONLimited performance with large files

Frequently Asked Questions