Paste two versions and every difference is marked where it sits — word by word, not line by line. Everything that survived is left plain, which is usually the part you were checking.
Paste both versions. Everything that changed is marked in place — removed text struck through, new text underlined — and everything that survived is left plain.
Most comparison tools work a line at a time. Change one word in a paragraph and the whole paragraph turns red, then green — technically correct, and useless, because you still have to read both versions to find the word.
This compares lines first to work out which ones survived, then compares the words inside the ones that were rewritten. So a clause where thirty (30) days became forty-five (45) days shows you those two changes and leaves the other forty words alone.
A contract that came back
They said they made two small changes. This tells you whether that is true, and where.
Your own draft, before and after
Paste what you wrote and what a tool gave back. Every change is visible, including the ones you would not have noticed.
Two exports that should match
Two lists that ought to be identical and are not. List mode gives you the three answers: only in A, only in B, in both.
A policy or terms update
Published documents change quietly. Keep the old one and you can always see exactly what moved.
Two lists rarely differ only in their contents. One has trailing spaces, one has blank lines, one is sorted and the other is not — and the comparison reports differences that are not really differences.
Run both through the list cleaner first — trim, deduplicate, sort — then paste them here. The two tools are built to be used one after the other.
It compares text, not files. A Word document pasted in loses its formatting, so bold, headings and tracked changes are not compared — only the words. For a Word file against a Word file, Word's own Compare Documents is the right tool.
It also has a ceiling: three thousand lines a side. Past that, the comparison needs more memory than a phone has, and the tool says so rather than freezing. List mode has no limit.
If what you want is not the difference between two versions but a better version of one, the cliché finder marks what is worth cutting, and the readability checker scores how hard it is to read.
Everything here runs in your browser — nothing you type is uploaded anywhere.
Word Counter
Words, characters, sentences and reading time, live.
Case Converter
Upper, lower, and Title Case done properly.
Word Cloud
Which words you actually lean on.
Readability
Flesch-Kincaid and three others at once.
Word Unscrambler
Every valid word in a jumble of letters.
Reading Time
How long a piece takes to read.
Citation Generator
APA, MLA, Chicago and Harvard.
Essay Counter
Word goals and progress for longer drafts.
X / Twitter Counter
Weighted counting and the real limits.
Instagram Counter
Where your caption gets truncated.