Code Compare & Diff Checker
A developer-grade diff checker. Upload files or paste code to instantly highlight differences, ignore whitespace, and export reports.
How to Use Code Compare
Paste two versions of text or code and instantly see what changed — added lines in green, removed lines in red.
Add Both Versions
Paste or upload the original on the left and the changed version on the right.
Find the Difference
Click Find Difference. Pick Split View or Unified view, and ignore whitespace if you like.
Share or Export
Copy a share link or export the result as HTML or PDF.
Views
Split or unified
Highlights
Changed words
Export
HTML · PDF · link
Works on
Phone & computer
Privacy
Runs in your browser
Price
100% free
Reading the Diff
What the colours and symbols mean.
| You see | Meaning |
|---|---|
| − red line | Removed from the original |
| + green line | Added in the changed version |
| Darker highlight inside a line | The exact words or characters that changed |
| Split view | Original on the left, changed on the right |
| Unified view | One column, like git diff |
| Ignore whitespace | Hides changes that are only spaces or tabs |
What Can You Use It For?
Popular ways people use Code Compare.
Code Reviews
See what changed between two versions of a file.
Contracts & Documents
Spot every edit in an agreement or policy.
Config Files
Find the one setting that changed in .env, YAML or JSON.
Writing
Compare drafts of essays, articles or translations.
Tips for the Best Result
- Format both sides the same way first — for example with the JSON Formatter or JS Beautifier — so only real changes show.
- Turn on Ignore Whitespace when indentation changed but the code did not.
- Share links keep the text inside the link itself — avoid sharing links that contain private data.
- Use PDF export to attach a change report to an email or ticket.
Frequently Asked Questions
Quick answers about Code Compare.
Paste or upload the original on the left and the changed version on the right, then click Find Difference.
No. The comparison runs in your browser. A share link stores the text inside the link itself.
Yes. Use the Upload buttons above each box, or drag and drop a file — .txt, .html, .css, .js, .json, .php, .xml, .csv, .md and .sql work.
It hides changes that are only extra spaces or tabs, so you see the real changes.
Split shows the two versions side by side. Unified shows one column with removed (−) and added (+) lines, like git diff.
Yes. Export it as an HTML file or PDF, or copy a share link.
Yes — code in any programming language, plain text, CSV, JSON and any spoken language.
Yes — 100% free, with no sign-up and no limits.
Related Free Tools
Ready to Use Code Compare?
Scroll up and get your result in seconds. 100% free, no sign-up needed.
Start Now