Free Private No signup

Don't guess what
changed. See it.

Paste two versions of any text and get a clear, plain-English summary of every difference — instantly, in your browser.

Compare text now
No signup · Free forever · Your files never leave your browser
Regions
7
changed
Removed
5
words
Added
19
words
Similarity
82%
Merged Side by side
Change 1 of 7
Changes concentrated near "Our office has moved..."

We are pleased to confirm your appointment for 1 March 15th April 3rd at 2 2:00 PM 10:30 AM. Please bring a valid photo ID 3 and 4 your insurance card , and any relevant medical records.

If you need to reschedule, contact us at least 5 24 48 hours in advance. We look forward to seeing you.

This is what it actually looks like — this is the real output.
"My client said they made 'a few small tweaks.' ChangeChecks found 14 changes, including a new non-compete clause."
— Freelance web developer

We don't just show you what changed. We explain it.

Other tools dump you into coloured text. We start with a summary — then Pro goes further with AI that explains what the changes mean.

  • Summary bar tells you what happened before you read anything
  • Change markers let you jump to each difference
  • Merged view reads like Track Changes — no learning curve
  • Pro: AI explains each change in plain English
AI Explanation · Pro Feature
1. Appointment rescheduled
March 15th at 2:00 PM
April 3rd at 10:30 AM
2. Additional documents required
Medical records now needed alongside photo ID and insurance card
3. Reschedule window extended
24 hours notice
48 hours notice

Compare anything

Upload two versions, see what changed. Every tool runs in your browser.

Popular
Confirm your appointment for March 15th April 3rd at 2:00 PM 10:30 AM. Please bring a valid photo ID and insurance card.
Text
Paste two texts. See every word that changed — highlighted, numbered, and summarised.
Learn more
New
Original
Edited
Images
Slide, fade, or overlay. Spot pixel-level differences between any two images.
Learn more
contract-v1.pdf 12 pages
contract-v2.pdf 9 changes
§4.2 — thirty (30) days sixty (60) days
PDFs
Upload two PDFs and see every text difference — contracts, policies, reports.
Learn more
report-draft.docx
Revenue grew by 12% 18% year-over-year
New section: Market Expansion
Documents
Track Word document revisions without Track Changes. Upload two .docx files.
Learn more
SKUProductPrice
A-204Cotton tee$22→$19
A-310Linen shirt$48
A-512Silk scarf$62
Spreadsheets
Find every changed cell. Upload two Excel or CSV files and see what moved.
Learn more
config.yml +3 −1
4 timeout: 30
5 retries: 2
5 retries: 5
6 backoff: exponential
Code
Syntax-highlighted diffs in 20+ languages. See additions, deletions, and modifications.
Learn more
"Finally a comparison tool I can use for client contracts without worrying where the text ends up."
— Freelance designer
Your files never leave your browser.
Client-side only
Everything runs in your browser. Nothing is sent anywhere.
Zero network requests
Check the network tab. Seriously.
Nothing stored
Close the tab, it's gone.

For people who work with words

Freelancers
See exactly what your client changed in the contract before you sign.
Writers & editors
Track every edit between drafts without wading through Track Changes.
Legal teams
Spot every clause that changed in a revised agreement.
QA & ops
Verify your config matches the approved version across systems.

Paste. Compare. Done.

No account. No install. No waiting.

Start comparing — it's free