Contract changes
See exactly what the other side changed in an agreement.
Text Diff Checker
Paste the old and new versions and see exactly what changed. The comparison runs in your browser.
Your files stay with you. Your files never leave your browser. This tool runs on your device: nothing is uploaded to our servers, so there is nothing for us to store or see.
How to use it
- Paste the original text on the left box and the changed text in the right box.
- Tick options to ignore case or extra spaces if needed.
- Read the side-by-side result: red lines were removed or changed, green lines were added.
Where it helps
Website copy edits
Check what an editor changed before publishing.
Config and code snippets
Spot the one changed line in a settings file.
Good to know
Stays in your browser
Your text is processed on your device and never sent to our servers.
Lines, not words
Each changed line is shown next to its new version.
Big differences
Compare smaller parts if thousands of lines differ.
Word or PDF files
Copy the text out first; binary files aren't supported.
Questions people ask
How do you compare two versions of a text?
Paste the original text in the left box and the changed text in the right, tick options to ignore case or extra spaces if needed, and read the side-by-side result: removed or changed lines in red, added lines in green. The comparison runs in your browser, so it's safe for contracts and drafts.
- Line by line Side by side. Changes paired.
- Red / green Removed / added.
- Ignore Case or spaces. Optional.
- 0 Data sent. In your browser.
How do I compare two texts?
Paste the original text in the left box and the changed version in the right box. The result appears side by side, with removed or changed lines in red and added lines in green. Tick options to ignore case or extra spaces if those differences don't matter.
Does it compare words or lines?
Lines. Each changed line is shown next to its new version, so you can spot the exact difference within it. For prose, putting each sentence on its own line makes the comparison clearer, because one changed word then highlights only one short line. Keep both versions handy.
Can I compare very large texts?
Texts that are mostly the same compare quickly even when they're long. If the two versions differ on thousands of lines, the tool asks you to compare smaller parts, so your browser stays responsive. Splitting by section or chapter usually works well. Chapters work well.
Is my text uploaded?
No. The comparison happens in your browser, so it's safe for private drafts, contracts and business documents. Nothing is sent to our servers or stored, and the text disappears when you close the page. Nothing is stored after you close the page, and there's no account, email address or sign-up of any kind.
Can I compare files?
Open each file in a text editor, copy the contents and paste them in. Binary files such as Word documents or PDFs aren't supported directly. For PDFs, use the PDF to text tool first, then compare the extracted text from both versions. Spreadsheets can be pasted as text.
What do the colours mean?
Red marks lines that were removed or changed in the original, and green marks lines that were added or changed in the new version. Unchanged lines are shown plainly, so your eye goes straight to the differences. Scan the coloured lines first, then read them closely.
Why use ignore case or ignore spaces?
When documents have been retyped or reformatted, small differences such as capital letters or double spaces can hide real changes among many unimportant ones. Ignoring them shows only the differences in wording that actually matter. Switch them off when formatting matters. Both options can be switched on together.
Can I check what changed in a contract?
Yes. Copy the text of both versions and compare them. Read every changed line carefully, especially numbers, dates and obligations. For legally important documents, the comparison helps you spot changes, but have a professional review the final agreement. Keep both versions for your records. Dates and amounts deserve a second look.
Is it useful for website content?
Yes. Compare the old and new versions of a page's copy to confirm only the intended edits were made before publishing. It's also handy for checking what a writer or AI tool changed in a draft. It also catches accidental deletions before they go live.
Can I compare code?
Yes, for snippets and configuration files. Line-based comparison suits code well, because each line usually holds one statement. For full projects, version control tools such as Git are better, but this is quick for one-off checks. Indentation differences show up too. Trailing whitespace changes can be ignored too.
Does it work with Hindi text?
Yes. It compares any text line by line, including Hindi and other scripts. Mixed Hindi and English text works the same way, so you can check translated or bilingual documents. Matras and conjuncts are compared exactly, so even a small spelling change shows. Results show both versions side by side.
Why does a whole line show as changed for one word?
Because the comparison works by lines. Look closely at the paired lines to find the changed word. Breaking long paragraphs into one sentence per line before comparing makes small changes much easier to see. Short lines make differences much easier to spot. Compare again after splitting long paragraphs.
Can I save the comparison?
The result stays on the page while you work. To keep a record, copy the relevant lines or take a screenshot. Nothing is saved by us, which keeps your documents private. Paste the key changes into an email or note if you need to share them.
Does it work on a phone?
It works in mobile browsers, but side-by-side results are easier to read on a wider screen. For long documents, use a computer or tablet in landscape mode. Rotating the phone to landscape gives more room for the two columns side by side. Short texts compare comfortably on phones.
Is it free?
Yes. The text diff checker is free, with no sign-up and no limit. It's part of the free text tools from Marketiism, alongside find and replace, sort lines and remove duplicate lines. Nothing is added to your text, there's no daily limit, and you can use it for business and client work.
Want this inside your own account?
Marketiism keeps your invoice numbers, GST reports, UPI payment links and WhatsApp reminders in one place. Leave your details and we'll call to set it up for your business, or start the trial yourself.
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