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Diff Suite
What it is
Diff Suite is a browser-based tool for comparing and merging two text files. It recalculates differences as you type and displays the files side by side; red and green arrows let users move changes between panes. Its edit menu can sort or reverse lines, remove empty or duplicate lines, trim whitespace, and replace line breaks with spaces. Users can open local text files, including TXT, Markdown, CSV, JSON, XML, YAML, HTML, JavaScript, Python, and log files. The maker says comparison and merging take place locally in the browser, without sending input text to its servers; its privacy policy says it does not collect personal information from users. Diff Suite works in browsers on macOS, Linux, ChromeOS, and Windows, and the maker says it supports phones and tablets. Text Compare Plus adds find, replace, and copy buttons and is also described as free. The free plan costs nothing, requires no sign-up, and has no usage limits. Diff Suite does not compare folders and provides neither a programmatic API nor an embeddable library.
For and against
For
- Updates file differences as users type.
- Moves edits between side-by-side panes.
- Opens many common text and code file formats.
- Comparison runs locally in the browser, according to the maker.
- Free plan has no sign-up or usage limits.
Against
- Compares two text files, not folders.
- No programmatic API or embeddable library.
- No free trial is listed.
The verdict
Diff Suite offers browser-based, two-file comparison and merging with editing controls and a free plan. It is not a folder comparison tool and does not provide an API or embeddable library.
Who it suits
Diff Suite may suit people who need to compare and merge two text files in a browser, including users working with common text and code formats. The maker says it works across desktop operating systems as well as phones and tablets.
Plans and prices
Text Compare & Merge Online
No usage limits · browser-based text comparison and merge
Read 9 Oct 2026 · diffsuite.com
On the record
- API and embedding
- Diff Suite is a hosted tool and does not provide a programmatic API or embeddable library.diffsuite.com · read 9 Oct 2026
- Browser privacy
- The maker says comparison and merge run locally in the browser and input text is not sent to its servers.diffsuite.com · read 9 Oct 2026
- Data collection
- The privacy policy says the service does not collect personal information from users.diffsuite.com · read 9 Oct 2026
- File support
- Users can open local text files, including TXT, Markdown, CSV, JSON, XML, YAML, HTML, JavaScript, Python, and log files.diffsuite.com · read 9 Oct 2026
- Live diff
- Differences are recomputed on each keystroke and shown side by side.diffsuite.com · read 9 Oct 2026
- Mobile use
- The maker says Diff Suite works on phones and tablets.diffsuite.com · read 9 Oct 2026
- Notable limit
- Diff Suite does not support folder comparison or the WinMerge plugin ecosystem.diffsuite.com · read 9 Oct 2026
- Plus version
- Text Compare Plus adds find, replace, and copy buttons and is also described as free.diffsuite.com · read 9 Oct 2026
- Purpose
- Diff Suite compares and merges two text files in a browser.diffsuite.com · read 9 Oct 2026
- Support
- The site provides a feedback page for contacting the maker.diffsuite.com · read 9 Oct 2026
- Supported systems
- The maker says Diff Suite works in a browser on macOS, Linux, ChromeOS, and Windows.diffsuite.com · read 9 Oct 2026
- Text editing
- The edit menu can sort or reverse lines, remove empty or duplicate lines, trim whitespace, and replace line breaks with spaces.diffsuite.com · read 9 Oct 2026
- Visual merge
- Red and green arrows let users move changes between panes.diffsuite.com · read 9 Oct 2026
