Text Diff Checker

About Text Diff Checker

When you edit a document, it is easy to lose track of what changed between versions. The Text Diff Checker compares two pieces of text and highlights added words in green and removed words in red, and it counts both. Editors, students, lawyers reviewing wording changes and developers comparing notes can use it to confirm exactly what was altered. The comparison happens in your browser, so your documents are not uploaded.

Example

Input: original "The meeting is on Monday at 10 am." and new "The meeting is on Tuesday at 11 am." Output: Monday shown as removed, Tuesday as added, 10 as removed and 11 as added, with a summary of 2 words added and 2 words removed.

Tips for better results

• Paste complete paragraphs rather than single lines for the clearest result.
• Compare word by word to spot small changes such as numbers and dates that are easy to miss.
• For very large documents, compare section by section.

When to use Text Diff Checker

Use the Text Diff Checker when two versions of a text look almost the same and you need to see exactly what moved. Editors compare a draft with the revised version, students compare a returned paper with their original, and teams check wording in policies or product descriptions. It also helps confirm that a copied block was not altered. It runs in your browser, so documents are not uploaded. For legal or contractual text, always read the changes in full context.

Real-world uses

• An editor receives a revised article from a writer and wants to see every word that was added or removed before approving it.
• A student wants to compare the draft submitted last week with the final version to see how much the essay changed after feedback.
• A marketer wants to confirm that the approved ad copy matches the text that was actually published on a landing page.
• A team member wants to check what changed between two versions of a policy paragraph before sending a summary to colleagues.

Common mistakes to avoid

• Comparing texts with different spacing or line breaks and mistaking those small differences for real edits to the wording.
• Pasting the older and newer versions in the wrong order, which reverses the meaning of additions and deletions in the result.
• Skimming the highlighted changes without reading the unchanged text around them, which can hide a change in meaning from context.

Compare two texts and see exactly what changed. It works instantly in your browser, so there is nothing to install and nothing to upload. Text Diff Checker is part of our collection of 100 free tools in the Writing & Email category.

How to use it

1. Enter your information or choose a file in the tool above.
2. Your result appears right below the tool.
3. Copy the result, or adjust your input and try again.

Frequently asked questions

Which text goes in the first box?

Put the original or older version first and the newer version second. Then additions show as new text and removals show as deleted text, which matches how most people read a change.

Is it good for checking small changes like numbers?

Yes, highlighting makes a changed figure or date easy to spot. Still, check each flagged number against its source, because the tool shows that something changed, not which version is correct.

Is Text Diff Checker free to use?

Yes. Text Diff Checker is completely free and you do not need to create an account.

Is my data uploaded anywhere?

No. This tool runs in your browser, so what you type or choose stays on your device.

How accurate are the results?

Calculations use standard formulas, but always double-check important figures, especially for money, health or legal decisions.