Text Compare & Merge Online
Free online diff merge tool — compare and merge two text files in your browser. No sign-up, 100% private.
Free online diff merge tool — compare and merge two text files in your browser. No sign-up, 100% private.
Everything runs locally in your browser — your text never leaves your device. There is nothing to install and no account to create.
.txt, .md, .csv, .json, .xml, .yml, .html, .js, .py, .log and more.Yes. The text compare and merge tool is 100% free, with no sign-up and no usage limits. There is also a Plus version with find/replace and copy buttons — also free.
No. The diff and merge logic runs entirely in your browser. Your text never leaves your device, which makes Diff Suite safe for source code, contracts, API keys, and other sensitive content.
Yes. Diff Suite works on plain text, so it compares any code (JavaScript, Python, JSON, YAML, HTML, XML, logs) the same way it compares prose. Use word wrap to keep long lines readable.
WinMerge is a desktop application for Windows. Diff Suite runs in your browser, so it works on macOS, Linux, ChromeOS and any device with a browser — see our WinMerge online alternative page. Mergely is a JavaScript library aimed at developers; Diff Suite is a ready-to-use tool with merge arrows, an edit menu, and file upload built in — see our Mergely alternative page.
"Compare" and "diff" both mean showing the differences between two texts. "Merge" goes one step further: it lets you combine the two versions into one, picking which changes to keep. Diff Suite does all three.
Yes. The left and right editors are exactly that — two side-by-side text areas. You can paste, type, or upload two files and Diff Suite will show every added, removed, or modified line. See our dedicated compare two text files online page.