Text Compare PRO

Side-by-side & inline diff tool

Samples:
100% Match
0 added
0 removed
0 unchanged
No diffs
Diff:
Fast, Secure & Free Online Diff Tool

Powerful Online Text & Code Comparison Utility

Compare raw text, source code, JSON payloads, and markdown documentation instantly. Identify line, word, and character-level differences side-by-side or inline with synchronized scrolling and precision formatting.

Real-time Highlighting

Granular side-by-side or unified view with line, word, and character-level change highlighting.

JSON & Code Formatting

Auto-format JSON, sort lines alphabetically, trim blank lines, and clean up formatting before comparing.

100% Client-Side Privacy

Your sensitive data and source code are processed entirely inside your browser and never uploaded to any remote server.

Export Patches & Reports

Download standard Git Unified Patch (.patch) files, HTML reports, or copy structured JSON diff metadata.

How to Compare Text Online (3 Simple Steps)

1

Input or Upload Text

Paste original text in the left pane and modified text in the right pane, or drag & drop files (.txt, .json, .js, .md) directly into the fields.

2

Customize Options

Toggle ignore whitespace, case sensitivity, or line numbers. Switch between Split and Unified view, or select word/character diff granularity.

3

Review & Export Results

Use the diff stepper (Alt+N / Alt+P) or search bar to jump between modifications, then export patch files or copy the report.

Frequently Asked Questions

Is my data safe and confidential?

Yes. All diff computations take place locally inside your client web browser. Zero text or file content is sent to external servers.

Can I compare formatted JSON files?

Absolutely! Click the "Format JSON" button on either editor pane to format raw JSON strings into pretty-printed structures before comparing.

What formats are supported for export?

You can export Git-compatible Unified Patch (.patch) files, downloadable HTML visual diff reports, or JSON metadata objects.

Are keyboard shortcuts available?

Yes! Press Alt+N for next diff, Alt+P for previous diff, Alt+S to swap panes, and Alt+E to open export options.