Diff Checker

Compare text and code side-by-side or unified to instantly identify insertions, deletions, and line changes.

+5 Additions

-4 Deletions

1 Unchanged Lines

Mode:

Ignore CaseIgnore WhitespaceDiffs Only

Original Text

Modified Text

Diff Visualizer10 lines total

1-function calculateTotal(price, tax) {

2- const total = price + tax;

3- console.log("Total is: " + total);

4- return total;

1+function calculateTotal(price, tax, discount = 0) {

2+ const subtotal = price + tax;

3+ const total = subtotal - discount;

4+ console.log(`Final Total: ${total}`);

5+ return Math.max(0, total);

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How to use Diff Checker

Quick steps so you can get results fast.

Paste or drop your data

Input text, code, or payloads directly. Most tools auto-detect format and encoding.

Pick the action

Choose the transform—format, validate, convert, or decode. Defaults match the current tool.

Review the preview

See live output alongside the input so you can spot issues before copying.

Copy or download

Copy results to clipboard or export when available. No signup needed.

About this tool

Everything you need to know about Diff Checker.

Diff Checker

Advanced text diff comparison

Browser-basedNo signupClipboard friendly

FAQs

Answers to the most common devtool questions.

Is everything client-side?

Most dev tools run entirely in your browser. For tools that need server help, requests are encrypted.

Do you store my data?

No. Inputs are kept in-memory in your session. Nothing is logged for formatting or validation tools.

Can I use keyboard shortcuts?

Yes. Common shortcuts like Ctrl/Cmd + A/C/V work. Some tools also support Ctrl/Cmd + Enter to run.

Will formatting change my content?

We preserve semantics. Converters and formatters avoid altering values, only structure and spacing.

How do I report an issue?

Use the feedback link in the header or share a sample payload. We typically patch fixes within a day.