What is a text compare tool?

A text compare (diff) tool shows line-by-line differences between two blocks of text — added lines, removed lines, and unchanged lines — so you can spot changes quickly.

Can I compare SQL or JSON?

Yes. Use the Format SQL or Format JSON buttons on each side to beautify before diffing. Ideal for comparing queries, configs, and API payloads.

What does ignore whitespace do?

When enabled, leading and trailing spaces on each line are ignored during comparison. Useful when indentation differs but content is the same.

Is my text sent to a server?

No. All comparison runs entirely in your browser. Your data never leaves your device.

Developer

Free Text Compare & Diff Checker Online

Compare two texts with line-by-line diff. Format SQL or JSON before comparing. Side-by-side or unified view, ignore whitespace and case — all in your browser.

Tool workflow

1Input

Paste original and modified text, SQL, or JSON

2Format

Beautify SQL or JSON on either side before diffing

3Compare

Line-by-line diff with added and removed highlights

4Export

Copy unified diff or review side-by-side

Text Compare & Diff

Compare two texts side by side. Format SQL or JSON before diffing. Runs entirely in your browser.

Ignore whitespaceIgnore case

Original (left)

Modified (right)

Diff results6 added · 4 removed · 0 unchanged

#	Original	#	Modified
1	SELECT id, name, email		—
2	FROM users		—
3	WHERE active = 1		—
4	ORDER BY created_at DESC;		—
	—	1	SELECT u.id, u.name, u.email, u.role
	—	2	FROM users u
	—	3	LEFT JOIN teams t ON u.team_id = t.id
	—	4	WHERE u.active = true
	—	5	ORDER BY u.created_at DESC
	—	6	LIMIT 100;

How it works

Compare — line-by-line diff updates as you type. Green = added, red = removed.

Format — beautify SQL or JSON on either side before comparing config, queries, or API payloads.

Private — all diffing runs locally in your browser. Nothing is uploaded.

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Frequently Asked Questions

What is a text compare tool?: A text compare (diff) tool shows line-by-line differences between two blocks of text — added lines, removed lines, and unchanged lines — so you can spot changes quickly.
Can I compare SQL or JSON?: Yes. Use the Format SQL or Format JSON buttons on each side to beautify before diffing. Ideal for comparing queries, configs, and API payloads.
What does ignore whitespace do?: When enabled, leading and trailing spaces on each line are ignored during comparison. Useful when indentation differs but content is the same.
Is my text sent to a server?: No. All comparison runs entirely in your browser. Your data never leaves your device.