Add the text, code or data.
01Text & Writing toolClean text
Text Diff
Compare two texts line by line.
100% FreeRuns instantlyNo watermark
- 1Paste inputAdd the text, code or data.
- 2AdjustChoose formatting or generation options.
- 3RunProcess everything in the browser.
Private by designProcessed on your device where possible.
Works on any deviceDesktop, tablet and mobile browsers.
No installationOpen the page and start working.
Always free coreUse the free plan for everyday tasks.
How to use Text Diff
Choose formatting or generation options.
02Process everything in the browser.
03Copy or download the clean result.
04Your files stay private
Your work is processed locally in your browser where possible and is never added to a Vootkit upload library.
Learn more about privacyTwo versions of a document and a vague memory of what changed is a bad combination, especially when the change that matters is a single word in a contract.
What Text Diff does
Compares two blocks of text line by line and marks what was added, removed or left alone.
It compares by line rather than by word, which suits documents, configuration files and code. A single-word change shows the whole line as changed on both sides, which is usually what you want to look at anyway.
How the comparison works
| Granularity | Line by line |
|---|---|
| Marked | Added, removed, unchanged |
| Best for | Contracts, configuration files, code, drafts |
| Less useful for | Prose reflowed to different line lengths |
| Whitespace | Counts — a changed indent is a changed line |
| Order | Left is the original, right is the new version |
| Processing | In this page — nothing is uploaded |
Detailed steps
- Paste the original on the left and the new version on the right.
- Read the marked lines.
- If everything appears changed, check for different line endings or reflowed paragraphs rather than assuming the worst.
Worth knowing
If a comparison shows every line as different, the text is almost certainly wrapped differently rather than actually rewritten — one version came from a PDF or an editor with a different line width. Normalising the wrapping first turns an unreadable diff into a useful one.
Frequently Asked Questions
Every line shows as changed. Why?
Usually different line wrapping or line endings — text copied from a PDF wraps at the page width, and Windows and Unix use different newline characters. The content may be identical while every line differs.
Can it show which word changed?
Not within a line; comparison is by line, so a one-word edit marks the whole line. For documents and code that is normally the useful granularity, since you want to read the line in context anyway.
Is it safe to paste a contract here?
The comparison runs in this page and nothing is transmitted, which is the reason to prefer it over a server-side diff for anything confidential.
Does whitespace count?
Yes. A changed indent or a trailing space makes the line different. That is deliberate — in code and configuration, whitespace changes are real changes.
Is Text Diff free?
Yes. The Vootkit free plan includes 5 tool runs a day. Upgrade to Vootkit Pro for unlimited daily use, an ad-free workspace and saved workflows.
Are my files uploaded?
No. Text Diff runs entirely in your browser — your file is processed on your own device and never sent to a server. There is nothing for us to store or delete.
Do I need to install anything?
No. Text Diff works in any modern browser on desktop, tablet or phone. Open the page and start.
How often can I use it? Is there a daily limit?
On the free plan you get 5 tool runs a day. When you reach the limit you'll see a prompt to upgrade, and it resets the next day. Vootkit Pro removes the cap entirely for unlimited daily use.
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This tool processes everything locally in your browser. You can disconnect from the internet after the page loads and it will still work.