Diff Checker / Text Compare

Name: Diff Checker
Author: iTryTools

Compare two code snippets or documents side-by-side or unified. Identify additions, deletions, and character modifications with GitHub-style diff highlights.

Original Text / Code (Before)

Changed Text / Code (After)

Visual Diff Inspector

+10 added-9 removed

Mode: lines • Layout: unified

-// User Authentication Handler v1.0

-function authenticateUser(req, res) {

- const { username, password } = req.body;

+// User Authentication Handler v2.0 (Secure Argon2 Hash)

+async function authenticateUser(req, res) {

+ const { email, password } = req.body;

- if (!username || !password) {

- return res.status(400).json({ error: "Missing fields" });

+ if (!email || !password) {

+ return res.status(400).json({ error: "Email and password required" });

}

- const user = db.findUser(username);

- if (!user || user.password !== password) {

- return res.status(401).json({ error: "Unauthorized" });

+ const user = await db.findUserByEmail(email);

+ if (!user || !(await verifyArgon2(password, user.passwordHash))) {

+ return res.status(401).json({ error: "Invalid credentials" });

}

- return res.json({ token: generateToken(user) });

+ const token = await generateJwtToken(user, { expiresIn: '7d' });

+ return res.json({ token, user: { id: user.id, email: user.email } });

}

About Diff Checker

Compare two text blocks side by side and highlight additions, deletions, and changes. Essential for reviewing contract edits, code patches, and document revisions before approval.

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