I built a free CBT thought record tool that runs entirely in the browser - no signup, no backend, no frameworks.

Why Vanilla JS?

CBT tools handle sensitive mental health data. Every extra dependency is an attack surface. Vanilla JS means: zero dependencies, works offline, auditable, portable.

The Core: Thought Record State Machine

A CBT thought record is a 7-step process: Situation -> Emotions -> Thoughts -> Distortions -> Alternatives -> Re-rate -> Action.

Here's the state machine that drives it:

const ThoughtRecord = { state: { emotions: [], thoughts: [], distortions: new Set() }, save() { localStorage.setItem('cbt-thought-record', JSON.stringify(this.state)); }, detectDistortions(text) { const patterns = { 'all-or-nothing': /always|never|every time/i, 'mind-reading': /they think|they must think/i, 'catastrophizing': /what if|disaster/i, 'should-statements': /should|must|have to/i }; const detected = new Set(); for (const [d, p] of Object.entries(patterns)) { if (p.test(text)) detected.add(d); } return detected; } };

The UI: Progressive Disclosure

One step at a time with a clear progress indicator - overwhelming = panic for anxious users.

Try It

No signup. No tracking. No frameworks.