99Tools vs ReactionTests

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

99Tools compared with ReactionTests
Detail	99Tools	ReactionTests
What it does	800+ free online tools for text, code, web, and data processing	Test your visual reaction time for free
Stage	Not given	Not given
Founded	Not given	Not given
Based in	IN	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	800+ tools across multiple categories Case converters for text transformation JSON formatter and validator Image compression and conversion Password generator CSS gradient generator HTML formatter Browser-based execution without installation Local data processing for privacy Mobile responsive design	Five-round visual reaction test with millisecond timing Seven-round sound reaction time test Local result history with up to 300 sessions stored Consistency measurement showing standard deviation of scores Download score card as image Sound calibration for personal offset adjustment Reference data from published research studies
What makes it different	All tools are completely free with no signup required Fast performance with minimal ads and no tracking Data privacy through local browser processing Clean interface without clutter or popups Works on all devices including mobile	No account or login required to use the test Results stored locally in browser for privacy Compare full sessions to understand consistency, not just fastest round Research-backed reference data from laboratory studies
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	38 no change since last check	3 no change since last check
Trust Flow (Majestic)	17	0
Citation Flow (Majestic)	21	11
Referring domains (Majestic)	82	1

4 details filled in for both companies.

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