Anti-bot systems analyze behavioral patterns to identify automated submissions. Stealth mode modifies your automation's behavior to match human patterns, making it effectively undetectable to most bot detection systems.
What Bot Detection Measures
Modern anti-bot systems (Cloudflare, PerimeterX, DataDome) analyze:
- **Typing speed and pattern:** Humans type at 40-80 WPM with natural variation. Bots type instantly.
- **Inter-field timing:** Humans pause between fields. Bots move instantly.
- **Mouse movement:** Humans move mice with natural curves. Bots don't move mice at all.
- **Form completion time:** Humans take 2-5 minutes on complex forms. Bots take seconds.
What Stealth Mode Does
Stealth mode addresses each signal:
**Typing simulation:** Characters are typed one at a time with random delays (25-75ms per character). Occasional longer pauses (300-400ms) simulate thinking mid-word.
**Pre-field pauses:** 0.8-2 second random pause before focusing each field, simulating the human hesitation before starting to type.
**Inter-field delays:** 0.5-3 second random delay between completing one field and moving to the next.
**Mouse simulation:** Mouse movement events are dispatched toward the field before clicking, simulating natural cursor movement.
The Speed Tradeoff
Stealth mode increases form completion time by 3-5×. Use it selectively:
- Enable for: major platforms, financial/government sites, anything with known strict bot detection
- Disable for: standard directories, most registration forms, anywhere speed matters more than stealth
For the full technical context, see our complete form automation guide.