Paste two texts
Paste or type the original on the left and the changed version on the right, or open text files.
WAVESPEED AI DIFF CHECKER Files stay on your device
100% FREE
Diff CheckerCompare two texts and see what changed.
Paste the original text on the left and the changed text on the right to see every difference, word by word, with line numbers.
Works with prose, lists, code and data, and with files too.
Word by wordLine numbersNo upload
No sign-up No upload No watermark
Loading the comparison tool…
Your documents are read and compared in your browser. They are never uploaded.
THREE SIMPLE STEPS
How to use the Diff Checker
Compare
Press Compare (or Ctrl+Enter). Added, removed and moved text is highlighted side by side.
Go through the differences
Jump between changes with N and P, switch to the redline view, or download a report.
WaveSpeed AI
Need pictures for your documents?
Create illustrations, photos and covers from a short prompt with WaveSpeed AI.
Image Generator
Make covers, illustrations and graphics for reports and proposals.
Video Generator
Turn a still image into a short video clip.
3D Generator
Turn a picture into a 3D model.
- 1,000+ AI models
- Image, video and 3D
- Pay as you go
$1 in free credits for eligible new accounts. No card needed. Generators have separate account and credit requirements. The document comparison tool is free.
/filters:quality(82)/media/images/1791123751656780930_IfFPY7R0.webp){kind=small}
/filters:quality(82)/media/images/1791123737177812425_RjKT3cku.webp){kind=small}
/filters:quality(82)/media/images/1791123748309870128_xlkNgK8N.webp){kind=small}
/filters:quality(82)/media/images/1791123738630744263_oR09R0aj.webp){kind=small}
/filters:quality(82)/media/images/1791177033162457776_uQ09OY7g.webp){kind=small}
/filters:quality(82)/media/images/1791123734319125607_JdnwGPY7.webp){kind=small}
/filters:quality(82)/media/images/1791123746355630206_udnxGPY7.webp){kind=small}
/filters:quality(82)/media/images/1791123744771362580_yC0sPezZ.webp){kind=small}
/filters:quality(82)/media/images/1791123738606970169_5KIR1ais.webp){kind=small}
/filters:quality(82)/media/images/1791123748197655725_EUmuFNW6.webp){kind=small}
Diff Checker FAQ
Is this diff checker free?
Yes. No account and no limit on text length.
Is my text sent anywhere?
No. The comparison runs in your browser and your text never leaves your device.
Can it ignore case, spaces or punctuation?
Yes. Turn on the Ignore options to leave out differences in case, spacing or punctuation.
Does it compare word by word or line by line?
Word by word, shown line by line with line numbers, so a one-word change in a long line is easy to spot.
Can I compare files instead?
Yes. Open text, PDF or Word files instead of pasting.
More free tools like this
All Free Tools
Diff Checker
Word by word · Line numbers · No upload