What it is
Quick Diff is an online diff tool to compare two texts or code blocks and instantly see differences. Paste left and right, choose (or leave on Auto) the language, and get a clear comparison—great for checking changes, patches, configs, JSON and markup.
- Compare text and code in seconds
- Automatic language detection (JSON, XML/HTML, JS/TS, CSS…)
- Readable diff with added/removed highlights
How it works
Paste or type the contents
Put the two texts (or code) into the editors: you can swap them instantly with one click.
Pick language and options
Set Auto or select the language. If you want, enable advanced options (spaces, blank lines, case, comments…).
View and save the comparison
Switch to Diff mode (side-by-side or inline) and, if needed, export the result to HTML/TXT or save both texts as JSON.
Features
Side-by-side or inline diff
Choose the best view: side-by-side for quick analysis or inline to read the change flow.
Smart normalization
Ignore spaces, blank lines, uppercase/lowercase or comments for cleaner comparisons focused on content.
Cleaner JSON and XML
For JSON you can sort keys; for XML/HTML you can normalize attributes to reduce pointless differences.
Export and fullscreen
Export diff and texts, and use fullscreen for long comparisons or more comfortable code reviews.
FAQ
No, you can use Quick Diff right away: open the page, paste content and compare.
Yes: Quick Diff detects JSON and can also sort keys to make the comparison clearer.
Yes, in advanced options you can ignore whitespace, blank lines, case and comments (depending on the language).