How to Compare Two Texts (Diff)

Quick answer: Compare two blocks of text line by line and see exactly what was added, removed, or changed. Open 文本对比 — everything runs locally in your browser, and files never leave your device.

Steps

1. Paste the old version on the left, the new version on the right.
2. Review the highlighted line-level differences.
3. Switch to character-level view for fine-grained changes within a line.

Important notes

• Diff runs on plain text — compare .docx or PDFs by exporting their text first.
• Big pastes with reordered paragraphs produce noisy diffs; compare section by section for clarity.

Common questions

Can I diff code with different indentation? Yes, but normalize tabs vs spaces first or every line looks changed.

Can I save the diff? Copy the result or take a screenshot for review records.