Kotej
Compare two folders, right in your browser
Pick two folders and Kotej pairs their files by path, then tells you which ones are the same, which changed and which exist on only one side. Open any file to see the differences.
Free, no account, and nothing is uploaded: everything is compared in your browser.
What it does
- The whole tree at a glanceEvery file and subfolder with its status: same, different, only on the left, only on the right. Filter to just the differences.
- Smart about contentXML and JSON compared by structure, logs field by field, text with optional tolerance for whitespace, case and line endings.
- Archives open like foldersA ZIP, JAR, WAR or EAR on either side is unpacked in the browser and compared entry by entry.
- Export the resultSave the list of differences to share it or attach it to a ticket.
How to use it
- Open Kotej and choose a folder for each side, or drag them in.
- Read the tree: the counters at the bottom say how many files differ.
- Click a file to see its differences, and use n and p to jump between them.
Questions
Is there a size limit?
Only your device's memory. Files are read lazily, as the comparison needs them.
Can I compare a folder with a ZIP file?
Yes. An archive on one side and a folder on the other compare the same way as two folders.
What if a file was renamed or moved?
Mark one file on each side as the base of a new comparison and Kotej compares them directly, whatever their paths.
Are my files uploaded?
No. Kotej runs entirely in your browser: files are read on your device and compared there. Nothing is sent to a server, which is also why it works on confidential configuration, customer data and production logs.
Is it free?
Yes, free and with no account. There is also a native macOS app with the same engine, for comparing folders straight from Finder: Kotej on the Mac App Store.