Free Brainstorming Tool — No Signup Required
Idea Dump is a free online brainstorming tool that lets you capture ideas and immediately challenge them. For each idea, write down why it won't work and what's good about it. This structured friction unlocks creative flow and helps you think more honestly about your ideas.
How to use Idea Dump
- Write any idea in the left column — no filter, no judgment
- List reasons why it won't work in the right column
- Click "what's good?" to capture the upsides
- Drag cards to reorder your ideas
- Open Summary to see all your ideas as a table, bubbles, outline, or list
Who is this for?
Entrepreneurs validating startup ideas, product managers doing pre-mortems, writers overcoming creative blocks, students brainstorming essays, or anyone who wants to think more clearly about decisions. Works great for pros and cons analysis, idea validation, and structured brainstorming sessions.
Features
- Multiple reasons why an idea won't work, per idea
- Pros and cons capture side by side
- Auto-saves to your browser — no account needed
- Drag and drop reordering
- Summary view: table, bubble map, outline, and ideas-only formats
- Keyboard shortcuts: Enter adds a new point, Backspace on empty removes it