By: SleeperBot Tools
Copy ESPN league history—including NFL.com leagues moved to ESPN—to Sleeper.
Overview
Features & Capabilities
User Growth & Download Statistics
Manifest V3 Extension
- By:
- SleeperBot
- Users:
- 5,000 3.00K
- Rating:
- 4.31 (16)
0.33
- Version:
- 0.5.3 Last updated: 2026-08-15
- Creation date:
- 2026-05-21
- Risk:
- High risk impact High risk likelihood
- Permissions:
- Host permissions:
- https://www.espn.com/*
- https://fan.api.espn.com/*
- https://fantasy.espn.com/*
- https://fantasy.nfl.com/*
- https://fantasyfootball.nfl.com/*
- https://lm-api-reads.fantasy.espn.com/*
- https://nextgenstats.nfl.com/*
- https://sleeper.com/*
- https://sleeper.app/*
- https://api.sleeper.app/*
- https://www.espn.com/*
- Content scripts matches:
- www.espn.com
- fantasy.espn.com
- fantasy.nfl.com
- fantasyfootball.nfl.com
- sleeper.com
- sleeper.app
- www.espn.com
- Size:
- 606.00KB
- Email:
- ad*****@sleeperbot.com
- URLs:
- Privacy policy
- Full description:
- See detailed description
- Source:
- Chrome Web Store
- Data ingested on:
- 2026-08-24
- Compare stats and ranking:
- Sleeper League Importer vs MUT.GG Binder Sync
- Sleeper League Importer vs Draft Hero Live Sync for Fantasy Football
- Sleeper League Importer vs Conch FF
For Developers
Contact the developer
Chrome-Stats does not own this Chrome extension. Please use these information below to contact the Chrome extension developer.
Permission Change History
2026-07-29: Version 0.3.0 → 0.4.0
Add Host permissions: https://nextgenstats.nfl.com/*
Add Permissions: declarativeNetRequest
2026-05-30: Version 0.1.1 → 0.2.0
Add Host permissions: https://fantasy.nfl.com/* https://fantasyfootball.nfl.com/*
2026-05-26: Version 0.1.0 → 0.1.1
Remove Host permissions: https://fan.api.qa.espnqa.com/*
User Reviews
Did not work properly, copied only settings... not players. History import was mixed bag and oversimplification. I would not recommend this.
by
Ni*****, 2026-08-22
doesn't support Yahoo transfer
by
B *****, 2026-08-17
Is Sleeper League Importer Safe?
Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.
Sleeper League Importer requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk impact analysis details
- Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
- High ******* ****** ** *** ********* ******** ********* ******** ************ ***********
Risk likelihood
Risk likelihood measures the probability that a Chrome extension may turn malicious. This is determined by the publisher and the Chrome extension reputation on Chrome Web Store, the amount of time the Chrome extension has been around, and other signals about the Chrome extension. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Chrome extension.
Sleeper League Importer may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.
Risk likelihood analysis details
- High This extension was recently updated in the past month. New updates may not be stable or safe.
- High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
- Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
- Good **** ********* *** **** **** *******
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Promo Images
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