Diff Suite

What Diff Suite is

Diff Suite compares and merges two text files in a browser. It recalculates differences with each keystroke and displays the files side by side, where red and green arrows let you move edits between panes. You can open local text files in formats including TXT, Markdown, CSV, JSON, XML, YAML, HTML, JavaScript, Python, and log files. Its edit menu can sort or reverse lines, remove empty or duplicate lines, trim whitespace, and turn line breaks into spaces. The maker says comparisons and merges run locally in the browser and input text is not sent to its servers; its privacy policy says it does not collect personal information. The free plan costs nothing, with no sign-up or usage limits. Text Compare Plus, also described as free, adds find, replace, and copy buttons. Diff Suite works in browsers on macOS, Linux, ChromeOS, and Windows, and the maker says it supports phones and tablets. It handles two-way comparisons, but not folders.

Who it suits

Diff Suite suits people who need to compare and combine two text files in a browser, including those working with common code, data, and document formats. It may fit users who want local browser processing and no sign-up or usage limits.

Getting started

1. Open the Diff Suite website in a browser.
2. Paste text into the two panes or open local text files.
3. Review the side-by-side differences as they update while you type.
4. Use the colored arrows to move changes between panes.
5. Use the edit menu to sort, reverse, or clean up lines.

Verdict

Diff Suite offers free, browser-based comparison and merging for two text files, with editing tools and support for many file formats. Consider its two-file scope and lack of API or folder comparison if those capabilities matter to your work.