Online Diff Checker
Check two texts online, ignoring blank-line noise.
Online Diff Checker is a browser-based text tool on TextToolsBase. Check two texts online, ignoring blank-line noise. To use it, paste or type your text and view the result directly in your browser — no signup and nothing to install.
Pasted text frequently arrives with empty rows that make a diff noisier than the real changes warrant.
Online Diff Checker filters blank lines so the comparison focuses on meaningful edits.
How to use Online Diff Checker
- Paste the first version into the left box and the second into the right.
- Turn on Ignore blank lines, and Ignore case if capitalization should not count.
- Scan the highlighted differences, then copy them.
Use cases
- Comparing copied text that brought along blank rows.
- Diffing two pasted snippets with inconsistent spacing.
- Checking notes where only empty lines differ.
Good to know
Online Diff Checker drops empty lines from both inputs before the line-by-line alignment, so blank-line noise does not show up as differences. The ignore options change matching only, and the comparison happens in the browser with nothing uploaded.
Frequently asked questions
Does it ignore empty lines?
Yes. With Ignore blank lines on, empty rows are removed from both sides before the comparison runs.
Will my pasted text be uploaded?
No. The diff is computed in your browser, so pasted snippets and notes stay local.
Does spacing inside a line affect the result?
Only when it changes the line itself; this checker matches complete lines after dropping blank rows.