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Experte Page Speed Test vs Yellow Lab Tools: catalog facts
Experte Page Speed Test	Yellow Lab Tools
Free Free to use online.	Free Free and open source under the GPL-2.0 licence.
Web	Web, Self-hosted, Command line
Tests many pages in one run Crawl, URL list or keyword-based modes	Checks front-end code quality as well as speed Detailed explanations of each issue
Crawls are capped at 60 seconds and 500 URLs Lab scores only, not real-user data	Development has slowed, with the last repository push in early 2024 Docker image is maintained by a third party
Web application	Downloadable app, Web application, Self-hosted
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.