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Text Diff

Compare two texts side by side or inline, with character-level highlights shown live as you type. Free, no sign-up, no ads.

How It Works

1

Enter two texts

Paste the original text on the left and the modified text on the right.

2

See changes live

Additions (green) and deletions (red) are highlighted in real time as you type.

3

Review changes

Switch between side-by-side and unified views. Character-level highlighting shows exactly what changed within lines.

FAQ

A character diff tool compares two texts and highlights exactly which characters were added, removed, or changed — not just which lines differ. This gives you precise, granular visibility into changes, which is especially useful for code reviews, config file updates, and proofreading.
The tool uses a line-level diff algorithm, then applies character-level diffing within changed lines for precise highlighting.
Yes. It works with any plain text — code, prose, config files, logs, etc.
No hard limit, but very large texts (100K+ lines) may take a moment to process.
Paste the original text on the left and the modified text on the right. The diff generator highlights additions, deletions, and character-level changes in real time — no setup or account required.

Built & Maintained by Varstatt

Varstatt is a one-person product studio run by Jurij Tokarski, product engineer since 2011. These tools are free and open — no signup, no catch.