Compare markdown files, code, and plain text with line-level and character-level highlighting. A free diffcompare alternative — compare text differences entirely in your browser.
| 1 | -function greet(name) { |
| 2 | - console.log("Hello, " + name); |
| 3 | return true; |
| 4 | } |
| 5 | |
| 6 | function add(a, b) { |
| 7 | return a + b; |
| 8 | } |
| 9 | |
| 10 | // Main |
| 11 | const result = add(2, 3); |
| 12 | -console.log(result); |
| 1 | +function greet(name, greeting = "Hello") { |
| 2 | + console.log(greeting + ", " + name + "!"); |
| 3 | return true; |
| 4 | } |
| 5 | |
| 6 | function add(a, b) { |
| 7 | + if (typeof a !== "number" || typeof b !== "number") { |
| 8 | + throw new Error("Arguments must be numbers"); |
| 9 | + } |
| 10 | return a + b; |
| 11 | } |
| 12 | |
| 13 | // Main |
| 14 | const result = add(2, 3); |
| 15 | +console.log("Result:", result); |
Paste the original text on the left and the modified text on the right.
Additions (green) and deletions (red) are highlighted in real time as you type.
Switch between side-by-side and unified views. Character-level highlighting shows exactly what changed within lines.
Paste any markdown — headings, lists, code blocks, links, tables — and this tool highlights exactly what changed at the character level. Unlike line-only diffs, you can see whether a single word in a heading was reworded or a URL in a link was updated, without scanning the whole line manually.
A line-level diff tells you which lines changed. A character-level diff goes further — it pinpoints the exact characters that were added, removed, or modified within each line. This matters when you're reviewing a renamed variable, a single-character typo fix, or a subtle config value change. Most char diff online tools only do line-level comparisons. This one does both: line diff first, then character diff within each changed line.
Beyond line diffs, this tool performs a character diff within each changed line — useful for spotting a renamed variable, a typo fix, or a subtle config value change. Paste code, prose, config files, or any plain text to get precise string diff output.
Paste two texts, get a diff. This diff generator works in real time — no upload, no processing delay. Additions show in green, deletions in red, character-level changes are highlighted inline. Use it as a quick diff online tool for code reviews, document comparisons, or checking what changed between two versions of any file.
Looking for a diff compare alternative? This tool does the same job — compare text differences online — with no account, no ads, and no data leaving your browser. Use it for quick markdown reviews, code comparisons, or any time you need a fast diff online.
Validate your idea with AI-powered discovery tools before writing code — run a Discovery session.
Varstatt is a one-person product studio run by Jurij Tokarski, product engineer since 2011. These tools are free and open — no signup, no catch.