oktools

Text Diff & Compare

Compare two blocks of plain text and see exactly what changed — line by line, and word by word inside an edited line. Paste them in or drop a file on either side. Everything is compared in your browser, so nothing you paste is uploaded.

6 lines · 204 characters
or drop one here
6 lines · 228 characters
or drop one here
43%Similarity
+1Added
−1Removed
~2Modified
OriginalChanged
1# Release notes1# Release notes
2The server starts on port 8080 by default.2The server starts on port 3000 by default.
3Set LOG_LEVEL to debug for verbose output.3Set LOG_LEVEL to debug for verbose output.
4Sessions expire after 30 minutes.4Sessions expire after 60 minutes of inactivity.
5Caching is disabled in development.
6Run npm start to launch the app.5Run npm start to launch the app.
6Run npm test to check everything still works.

Frequently asked questions

How do I compare two texts?

Paste the original on the left and the changed version on the right, or drop a file into either side. The comparison runs as you type: added lines are green, removed lines are red and edited lines are amber, with the words that actually changed picked out inside them.

What is the difference between the three views?

Side by side puts the two versions in adjacent columns, already lined up. Inline stacks them into one unified list, the way git shows a diff. Changes only drops every unchanged line, which is the fastest way to answer "what actually changed" in a long file.

Can I ignore indentation or capitalisation?

Yes. Ignore whitespace treats any run of spaces or tabs as a single space, so a reindented block stops counting as a change. Ignore case compares letters without regard to capitalisation, and ignore blank lines leaves empty lines out of the comparison. The text is always displayed exactly as you typed it.

Can I export the result as a patch?

Copy as patch puts the comparison on your clipboard as a unified diff, with three lines of context around each change — the format git apply, patch and code review tools read. It is also the most compact way to paste a difference into a ticket or a chat.

How large a text can it compare?

Thousands of lines a side compare in a few milliseconds. Matching lines at the start and end are settled first and the rest is split on lines that occur only once, so the work stays proportional to how much actually changed rather than to the size of the text.

Is my text uploaded anywhere?

No. The whole comparison runs in your browser, so contracts, logs, source code and anything else you paste here never leave your device. Nothing is uploaded, stored or logged.