Optimize Your Human Hardware.
25 free diagnostic tools built for high-performance developers. No ads, no accounts, instant results.
Biological Runtime
beta_v0.stableBurnout Risk Assessment
Detect early warning signals of systemic exhaustion.
Sleep Quality Calculator
Calculate sleep debt and neuro-recovery scores.
Sedentary Risk Calculator
Quantify the metabolic cost of the 8-hour chair session.
Body Fat Estimator
Rapid, accurate body composition snapshot.
BMR & TDEE Calculator
Sedentary TDEE engine for desk-bound developers.
Vitamin D Calculator
Optimize sunlight exposure for immune function.
Cognitive Performance
brain_1.0Cognitive Fatigue Score
Measure mental depletion before starting a sprint.
Work-Life Balance Score
Quantify boundary integrity and imbalance patterns.
Context Switch Cost
Calculate cognitive overhead of task-switching.
Deep Work Planner
Schedule focus blocks around your cognitive peak.
Ergonomics Suite
ergo_2.0Posture Check Timer
Biomechanics-based assessment for sedentary engineers.
Eyestrain Risk Calculator
Compute screen exposure and blue light saturation.
Desk Setup Checker
Ergonomic configuration audit for your workstation.
Blue Light Exposure
Quantify blue light impact on melatonin and sleep.
Productivity Stack
flow_state_v1Network & Security
sec_v1Developer Toolkit
dev_tools_v3JSON Formatter
Validate, format, and minify JSON with highlighting.
Base64 Converter
Encode and decode Base64 strings. URL-safe mode.
URL Encoder / Decoder
RFC-3986 percent-encoding for URL components.
Markdown Preview
Real-time Markdown editor with GFM preview.
Text Diff
Compare two text blocks with line-by-line diff.
Word Counter
Count words, chars, sentences, and reading time.