This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
- By:
- Wsl_F
- Users:
- 50,000
- Rating:
- 4.19 (165)
- Version:
- 1.3.2 Last updated: 2022-11-28
- Creation date:
- 2020-06-16
- Risk:
- Low risk impact Very low risk likelihood
- Host permissions:
- https://cf-predictor.wasylf.xyz/
- https://cf-predictor.wasylf.xyz/
- Size:
- 87.00K
- Email:
- Wa*****@gmail.com
- Full description:
- See detailed description
- Source:
- Chrome Web Store
- Updated:
- a day ago
Other platforms

User reviews
Pros
- Provides approximate rating predictions that can be very close to actual contest ratings.
- Users find it useful and appreciate its functionality when it works.
- Recognized as an amazing and accurate tool for rating predictions by some users.
- Gets kudos and thanks from users who experienced its positive features.
Cons
- The extension frequently stops working or doesn't function as expected for extended periods.
- Output sometimes shows only generic messages like "Good luck & high rating!" instead of detailed predictions.
- Rating predictions are approximate and can sometimes be significantly off (e.g., 10-15% less than actual ratings).
- No recent updates or fixes noted despite multiple user complaints about non-functionality.
Recent reviews
not working
by
SO*****, 2025-02-10
not working
by
Fi*****, 2025-01-26
not working
by
Ta*****, 2024-11-17
Extension safety
Risk impact
CF-Predictor requires very minimum permissions.
Risk impact analysis details
- High Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
- Low ******* ****** ** *** ********* ******** ********************
Risk likelihood
CF-Predictor has earned a good reputation and can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* ** ****** ** ********
- Good **** ********* *** **** **** *******
Upgrade to see full risk analysis details
Compare extensions
- Compare CF-Predictor vs Codeforces Enhancer
- Compare CF-Predictor vs Codeforces++
- Compare CF-Predictor vs CF Analytics
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