TEXT COMPARISON GUIDE

How to compare two text files online

Paste or copy the original text and the changed text into separate panels, run a local comparison, then review additions, removals and modified words in context.

Quick answer

Place the older version on the left and the newer version on the right.
Run the comparison locally in your browser.
Review line-level changes first, then inspect highlighted words inside modified lines.

Three steps to compare text

Open Text Compare and paste the original text into the left panel.
Paste the revised version into the right panel. Use Swap sides if the versions are reversed.
Select Compare Text, then use the previous and next controls to move through each change.

How to read the result

Result label	Meaning	What to review
Added	Content exists only in the changed version.	Confirm that the new wording is intended.
Removed	Content exists only in the original version.	Check whether important context was deleted.
Modified	Related lines contain different words.	Read the word-level highlights inside the aligned lines.

A reproducible example

Compare these two one-line versions:

Original: Ship the release on Monday.
Changed:  Ship the release on Tuesday.

Diff Master aligns the two lines, marks the line as modified, removes “Monday” and adds “Tuesday”. Matching words stay visible as context.

Choose a format-specific tool when structure matters

Use Code Compare for syntax highlighting, whitespace controls and Unified Diff.
Use Markdown Diff to identify heading, list, table and fenced-code-block changes.
Use JSON Diff when object-key order should not count as a change.
Use PDF Compare when page layout, fonts or images matter.

Current limits

Text Compare operates in browser memory and is limited by the memory available to the device. It compares text, not Word formatting, PDF layout or semantic equivalence. Refreshing or closing the tab clears the local session.

Ready to compare?

Open the matching tool and keep both versions in this browser.

Open Text Compare