Spotting the difference between two versions of a document by eye is slow and error-prone. Whether you are comparing two drafts of an article, checking what changed in a contract, or reviewing edits to a block of code, a text diff tool does the work for you in an instant. Our free online text compare tool highlights every addition and deletion between two texts — entirely in your browser, with nothing uploaded to a server.
What Does "Compare Two Texts" Mean?
Comparing two texts — often called a text diff or text comparison — means finding the exact differences between an original version and a modified version. A good diff tool shows you:
- Additions — text that appears in the new version but not the old one (usually highlighted in green).
- Deletions — text that was removed from the original (usually highlighted in red).
- Unchanged text — content that is identical in both versions.
This makes it easy to see what changed at a glance, instead of reading both versions line by line.
How to Compare Two Texts Online
- Paste the original text into the left panel.
- Paste the modified text into the right panel.
- View the highlighted differences instantly — additions in green, deletions in red.
- Switch to a unified view if you prefer to see all the changes in a single combined column.
Because everything runs locally in your browser, even sensitive documents stay completely private.
Common Uses for a Text Diff Tool
Writing and editing — Compare two drafts of an essay, blog post, or report to see exactly what an editor changed.
Code review — Quickly check what was modified between two versions of a script or configuration file without setting up version control.
Contracts and legal documents — Identify every change between two versions of an agreement so nothing slips through unnoticed.
Content updates — See what was added or removed when a webpage, policy, or document is revised.
Plagiarism and duplication checks — Compare two pieces of text to measure how similar they are. To strip exact repeats from a single list instead, use a duplicate line remover.
Tips for Accurate Text Comparison
- Compare like with like. Paste plain text into both panels; formatting differences can otherwise be flagged as changes.
- Use the unified view for long documents. It keeps related additions and deletions together so changes are easier to follow.
- Watch for whitespace. Extra spaces or line breaks count as differences — clean your text first if you only care about wording.
Frequently Asked Questions
Is the text diff tool free? Yes — it is completely free, requires no sign-up, and runs in your browser.
Is my text uploaded anywhere? No. All comparison happens locally in your browser, so your text never leaves your device — ideal for confidential documents.
Can I compare code as well as plain text? Yes. The tool works with any text, including source code, configuration files, and structured data.
What do the colours mean? Green highlights show text added in the new version, and red highlights show text removed from the original.
Stop hunting for changes by eye — paste your two versions and let the text diff tool reveal every difference instantly.