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Diff Suite

Diff Suite is a free browser tool for comparing and merging two text files.

Place
#21 of 29
Score
5.9
Diff Suite's website

What Diff Suite is

Diff Suite is a free browser tool for comparing and merging two text files. It updates the differences as you type and shows both versions side by side. Red and green arrows let you move changes between panes. An edit menu can sort or reverse lines, remove empty or duplicate lines, trim whitespace, and turn line breaks into spaces. You can open local TXT, Markdown, CSV, JSON, XML, YAML, HTML, JavaScript, Python, and log files. The maker says comparison and merging run 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, also described as free, adds find, replace, and copy buttons. The free plan requires no sign-up and has no usage limits. Diff Suite handles two-way text comparison, not folder comparison.

Good

  • Differences update as you type in side-by-side panes.
  • Supports common text, code, and data file formats.
  • Comparison and merging run locally in the browser.
  • Free plan has no sign-up or usage limits.

Watch out

  • Does not support folder comparison.
  • No programmatic API or embeddable library.
  • Does not support the WinMerge plugin ecosystem.

Who it suits

Diff Suite suits people who need to compare or merge two text files in a browser, including users of the listed desktop systems, phones, or tablets. It may also suit those who want local file handling and line-editing tools without a sign-up.

Verdict

Diff Suite offers focused, two-file comparison and merging with editing tools and local browser processing. Choose it for text files rather than folder comparisons, API access, or WinMerge plugins.

Plans and prices

From Diff Suite's own pricing page, checked 9 Oct 2026.

All about pricing
PlanPriceWhat it gives you
Text Compare & Merge OnlineFreeNo usage limits · browser-based text comparison and merge · Free, with no sign-up or usage limits

The facts

Each one read from Diff Suite's own pages, with the date it was checked.

What it does

API and embedding
Diff Suite is a hosted tool and does not provide a programmatic API or embeddable library.checked 9 Oct 2026
Data collection
The privacy policy says the service does not collect personal information from users.checked 9 Oct 2026
File support
Users can open local text files, including TXT, Markdown, CSV, JSON, XML, YAML, HTML, JavaScript, Python, and log files.checked 9 Oct 2026
Live diff
Differences are recomputed on each keystroke and shown side by side.checked 9 Oct 2026
Mobile use
The maker says Diff Suite works on phones and tablets.checked 9 Oct 2026
Notable limit
Diff Suite does not support folder comparison or the WinMerge plugin ecosystem.checked 9 Oct 2026
Plus version
Text Compare Plus adds find, replace, and copy buttons and is also described as free.checked 9 Oct 2026
Purpose
Diff Suite compares and merges two text files in a browser.checked 9 Oct 2026
Support
The site provides a feedback page for contacting the maker.checked 9 Oct 2026
Supported systems
The maker says Diff Suite works in a browser on macOS, Linux, ChromeOS, and Windows.checked 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.checked 9 Oct 2026
Visual merge
Red and green arrows let users move changes between panes.checked 9 Oct 2026

Where it runs

Browser privacy
The maker says comparison and merge run locally in the browser and input text is not sent to its servers.checked 9 Oct 2026

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