A worked example
Compare “A / B / C” with “A / D / C” to see B removed and D added.
DIFFKIND / EVERYDAY TOOLS
Spot the changes.Keep the useful words.
Compare two drafts, tidy repeated lines and inspect invisible characters. Every transformation stays in your browser.
Make a little plan✓ Free to use✓ No uploads✓ Ready to print
MEASURE / PLAN / MAKEA clearer plan starts here.
Made for your browser.
YOUR LITTLE WORKBENCH
ON YOUR DEVICE ✦Text comparison
Text stays in page memory. Nothing is uploaded or saved automatically. Download a copy before changing tool pages.
Added2
Removed1
Matched2
Plan the day
+Meet at eleven
−Meet at ten
Bring a notebook
+Share the notes
This is a comparison report, not an executable patch. Ignored differences can match without changing either original text.
Plain text only · 100,000 characters per input. Line diff: 1,200 lines; character diff: 1,500 Unicode code points. No semantic or fuzzy comparison.
THE METHOD / 01
A clear wayfrom start to finish.
A bounded longest-common-subsequence comparison produces an ordered edit sequence. Whitespace and case options affect comparison only.
Keep the assumptions clear
Up to 1,200 lines per side, or 1,500 Unicode code points in character mode. Very large comparisons are rejected to keep the page responsive.
A FEW USEFUL ANSWERS
Good to know.
Are my inputs uploaded?
No. Processing runs locally in your browser. The host still receives normal requests for website pages and assets.
Can I keep my result?
Use the download controls for the current tool or print from your browser. Seating plans, flashcards and document drafts autosave in this browser; see the privacy page.
Do I need an account?
No sign-up, paid API or subscription is required. Both languages use the same tools. English always opens at the root address.
DIFFKIND / TOOLKIT
A little help for every step.
01
Text comparison
Compare text by line or Unicode character, with additions and removals clearly marked.
Open tool02
Line cleaner
Remove repeated or blank lines, trim line edges and optionally sort the result.
Open tool03
List comparison
Find shared items, items only in either list, and the combined unique list.
Open tool04
Invisible characters
Show spaces, tabs and line endings; remove a defined set of zero-width characters.
Open tool