Text Compare — Diff Checker to Compare Two Texts Online Free
Free text compare and diff checker — paste two texts to highlight added, removed, and changed lines with unified or split views. No signup.
Also searched as: text diff · compare two texts · document comparison · online diff tool · text difference finder
How to Use
Step-by-step guide to get the most from this tool
- 1
Paste originals
Enter original text in the left panel and modified text on the right.
- 2
Choose view
Switch between unified and split diff views.
- 3
Ignore whitespace
Enable if only trailing spaces differ.
- 4
Copy diff
Export the unified diff for tickets or version control.
Features
What makes this tool stand out
Unified diff
Classic +/- line output with numbers.
Split view
Side-by-side removed vs added panels.
Ignore whitespace
Skip trailing space differences.
Copy output
One-click unified diff copy.
Stats
Added, removed, and unchanged counts.
Private
No server upload.
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Frequently Asked Questions
Quick answers to common questions
How do I compare two texts online for free?+
Paste your original text in the left box and the modified text in the right box. ToolReign instantly highlights added lines in green and removed lines in red — no signup required.
What is a text diff checker?+
A text diff checker compares two pieces of text and shows exactly what changed — which lines were added, removed, or modified. Used by developers, writers, and editors to track changes between versions.
Can I compare two Word documents online?+
Yes. Copy and paste the content from both Word documents into the two text boxes and the diff checker will highlight all differences instantly.
How do I find the difference between two texts?+
Use a diff checker tool — paste both texts and it automatically finds and highlights every difference. ToolReign shows word-level and line-level differences.
What is unified vs split view?+
Unified shows +/- lines in one panel. Split shows original (removed) and modified (added) side by side.
What does ignore whitespace do?+
It trims trailing spaces on each line before comparing, ignoring insignificant whitespace differences.
How does line-by-line diff work?+
The LCS algorithm finds optimal alignment, then marks each line as added, removed, or same.
Can I copy the diff output?+
Yes. Copy Diff exports unified format with + and - prefixes.
Can I compare code?+
Yes. Paste source code in both panels — ideal for code reviews and config changes.
Is my text private?+
Yes. All comparison runs locally in your browser.
How is this different from JSON compare?+
This tool compares plain text line-by-line. Use JSON Formatter for structured JSON diffs.