| What it does | Free online tools for everyday tasks, no signup required
| Test your visual reaction time for free
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| Pricing model | Free
| Free
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| Key features | - Text Case Converter – convert text to uppercase, lowercase, title case and more
- Word Counter – count words, characters, sentences and paragraphs
- QR Code Generator – generate QR codes instantly for text and links
- Percentage Calculator – calculate percentages instantly
- Random Picker – pick random items, names or choices easily
- Text Sorter – sort lines or text in ascending or descending order
- Image Compressor – compress images without losing quality
- MD5 Generator – generate MD5 hash from any text
- URL Encoder/Decoder – encode or decode URLs instantly
- JPG to PNG Converter – convert and save images instantly
| - 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
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| What makes it different | - No signup required – use all tools instantly without creating an account
- Complete privacy with browser-based processing – data never leaves your device
- Fast and instant results with no loading screens or waiting
- Mobile-friendly interface that works perfectly on all devices
- Simple and easy-to-use clean interface without clutter
| - 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
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| Free plan | Not given
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| Open source | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 31 ▼ −1 (down) since last check | 3 ● no change since last check |
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| Trust Flow (Majestic) | 9 | 0 |
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| Citation Flow (Majestic) | 9 | 11 |
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| Referring domains (Majestic) | 33 | 1 |
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Utilonix
ReactionTests