TEXT & DEVELOPER TOOLS
Text Diff Checker
Compare two versions of text line by line, word by word or character by character, in unified or side-by-side view.
Quick answer: Paste the original and the changed text. Differences highlight right away, and you can copy or download a unified patch.
Use Text Diff Checker ↓Loading the tool…
How to use Text Diff Checker
- Add both versionsPaste or open a file on each side.
- Choose how to compareLine, word or character mode, unified or side-by-side view, and options to ignore case, whitespace or blank lines.
- Review and exportSee additions, removals and a similarity percentage. Copy or download the patch.
Good to know
Common uses: Reviewing document edits, comparing configs and checking code changes.
Practical example: Paste two drafts of a paragraph and switch to word mode to see exactly which words changed.
Important limitation: Very large inputs take longer. Unchanged blocks are collapsed to keep the view readable, and you can expand them. The diff reports differences in text, not meaning.
For sensitive work, read the privacy information and follow your organization’s data-handling policy.
How it works
An efficient Myers diff finds the minimum edit script, with a fallback for very large inputs. Changed lines get word-level highlights, and results can be output as a unified patch.
Real-world uses
- Reviewing edits to a document
- Comparing two config files
- Checking what changed between drafts
Tips for better results
- Ignore whitespace when comparing text from different editors.
- Use side-by-side view on wide screens and unified on phones.
- Download the patch to share changes.
Frequently asked questions
Can I compare by word?
Yes. Line, word and character modes are available.
Can it ignore whitespace or case?
Yes, along with blank lines.
What is the similarity percentage?
The share of content that is unchanged between the two texts.
Can I download the differences?
Yes, as a unified patch.
Is my text uploaded?
No. Comparison happens in your browser.
Is the Text Diff Checker free?
Yes.