Regex Vis — Expression visualizer

Developer ToolsSee it liveregex-vis.com

A small railroad diagram occupies a broad canvas, with a regex input below and a symbol legend at the right.

Regex Vis — Expression visualizer — captured interface — Viewport capture · opening screen

Public demo · 2026-09-08Open full image ↗

Why this pattern works

Place the editable expression beside an explanatory visual and a persistent syntax legend.

Design notes

Surface: Regex Vis — Expression visualizer
Navigation: A thin top navigation leads to examples, language settings, and display options.
Layout: The diagram, expression field, and legend occupy clearly separated regions.
Density: Low density in the graph balances compact syntax guidance.
Color: White, pale gray, black outlines, and subtle selection borders.
Type: Small sans-serif labels keep tools and content visually separate.
Pattern: Place the editable expression beside an explanatory visual and a persistent syntax legend.
States: This capture records the visible state only. Loading, error, and later workflow states were not verified.
Don't: Adapt the interface pattern with original content, branding, and data; do not infer behavior from a still image.

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What should the tool respect?

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Prompt text

# My project
[Describe the product, audience, and screen you want to improve]

Stack: Use the existing project stack
Task: Implement the interface and verify the result in the existing project.

## Tool guidance (Any AI tool)
Use available project tools to inspect, implement, and test. State any unavailable capabilities.

# Design reference: Regex Vis — Expression visualizer
Source: https://regex-vis.com/?r=%28hello%7Cworld%29%2B
Swipefile reference: https://swipefile.design/ref/ui-regex-vis/
Captured: 2026-09-08. This is a dated reference, not a claim about the current live product.
Capture scope: one viewport. Do not infer unseen page sections or a complete user flow.

## Objective
Adapt the interaction and layout patterns below to my project. Use my own content and identity. Do not reproduce logos, proprietary copy, or brand assets.

## Reference notes
- surface: Regex Vis — Expression visualizer
- nav: A thin top navigation leads to examples, language settings, and display options.
- layout: The diagram, expression field, and legend occupy clearly separated regions.
- density: Low density in the graph balances compact syntax guidance.
- color: White, pale gray, black outlines, and subtle selection borders.
- typography: Small sans-serif labels keep tools and content visually separate.
- pattern: Place the editable expression beside an explanatory visual and a persistent syntax legend.
- states: This capture records the visible state only. Loading, error, and later workflow states were not verified.
- dont: Adapt the interface pattern with original content, branding, and data; do not infer behavior from a still image.

Useful for: Place the editable expression beside an explanatory visual and a persistent syntax legend.

## Acceptance criteria
- Existing project conventions, design tokens, working functionality, and unrelated changes are preserved.
- Two or three reference principles clearly support the user's task; conflicts are resolved in favor of usability and the existing product.
- Reusable components and semantic HTML express the interface. Available licensed assets are used; important UI text is never rendered as a bitmap.
- Every visible control has a defined behavior. Loading, empty, error, success, disabled, and long-content states are specified where relevant. Demo data is clearly labeled.
- Navigation and content adapt at 375px, 768px, and 1440px without horizontal page overflow. Keyboard use, visible focus, labeled inputs, at least 44px touch targets, readable contrast, and reduced motion are supported.
- Verification distinguishes rendered behavior from proposals and identifies anything still requiring a backend or external service.

## Quality bar
Clear hierarchy, consistent spacing, restrained surfaces, and purposeful motion. Avoid decorative gradients, excessive cards, placeholder buttons, and invented metrics unless the project calls for them. Do not claim a feature is connected or tested without evidence.

Assembled in your browser. No API key or AI request needed. Changing the fields refreshes the preview.

## Objective
Adapt the interaction and layout patterns below to my project. Use my own content and identity. Do not reproduce logos, proprietary copy, or brand assets.

Useful for: Place the editable expression beside an explanatory visual and a persistent syntax legend.

Regex Vis — Expression visualizer

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