JSON Formatter
Format, validate, and beautify JSON instantly.
Diff Viewer
Compare Text or JSON with side-by-side and inline views
Paste large inputs, switch comparison mode, and highlight additions, removals, and changed lines or JSON paths.
Left JSON error: Unexpected non-whitespace character after JSON at position 18 (line 2 column 1)
Right JSON error: Unexpected non-whitespace character after JSON at position 42 (line 2 column 1)
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JSON Differences0 paths
No differences detected.
Diff Viewer for Text and JSON
Use Text mode for quick line-by-line comparison of logs, configs, or pasted files. Use JSON mode for semantic path-based comparison that ignores formatting noise and focuses on changed keys and values.
Side by Side vs Inline
Side-by-side view helps you scan left/right content in parallel. Inline view is better when you want a patch-style stream with + and - markers. Both modes highlight additions, removals, and modifications.
Large Text Paste Support
This tool is designed for large pasted text. Comparison runs locally in your browser, and rendering is capped when needed to keep the UI responsive.
Privacy and Security
All comparison logic runs client-side in your browser. Your text and JSON payloads are not uploaded to a server.
FAQs
What is the difference between Text mode and JSON mode?
Text mode compares input line by line and is ideal for logs, config files, and plain text. JSON mode parses both payloads and compares semantic paths and values, so it can focus on real key/value changes instead of formatting differences.
What is the difference between side-by-side and inline views?
Side-by-side view displays left and right content in parallel columns for quick visual scanning. Inline view shows a patch-like stream with added (+), removed (-), and changed lines in a single flow.
Does array order matter in JSON mode?
Yes. JSON arrays are ordered, so [1,2] and [2,1] are treated as different. If your use case is order-independent, sort arrays before comparing.
Can I paste large text into this diff viewer?
Yes. The tool is designed for large pasted input and keeps comparison client-side in your browser. For very large inputs, rendering may be capped to keep the UI responsive while still letting you export diff output.
Is my input data uploaded anywhere?
No. The comparison runs entirely in your browser. Text and JSON inputs are not sent to any server.
Is Free Diff Viewer Online (Text + JSON, Side-by-Side & Inline) free to use?
Free Diff Viewer Online (Text + JSON, Side-by-Side & Inline) is completely free and runs in your browser.
Does Free Diff Viewer Online (Text + JSON, Side-by-Side & Inline) send my data to a server?
No. Free Diff Viewer Online (Text + JSON, Side-by-Side & Inline) processes input directly in your browser.
Do I need to create an account to use Free Diff Viewer Online (Text + JSON, Side-by-Side & Inline)?
No account is required to use Free Diff Viewer Online (Text + JSON, Side-by-Side & Inline).
Privacy-first by design
Tool inputs are processed in your browser. Review the Privacy Policy and Terms for full details.
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