Paste two versions of a text and see a line-by-line diff — everything runs in your browser, nothing is uploaded.
Paste two versions of a text, a config file or a code snippet and see exactly which lines were added, removed or changed. The Diff Checker computes a line-by-line diff using the same longest-common-subsequence approach as command line diff, with colour-coded output.
Ideal for comparing two API responses, two drafts of a document, or a config before and after a deploy — without installing anything and without uploading the text.
It works line by line, like Git. A changed line shows as one removed and one added line.
No hard limit; files with thousands of lines compare in well under a second.
No. The diff is computed in your browser.
Free, private, no account. Like every DevForge tool, this one runs in your browser and never uploads your files. See all 35 free tools or join the DevForge community to share your own games, tools and assets.