UD5 Toolkit
QR Code Logo Embedder – Online Preview Before Print
Generate a QR code and overlay your logo in the center. Check if it still scans. Download composition.
Tag: Animation & GIF Previewer
23+ toolsTattoo Placement Simulator – Upload a Photo & Test Designs
Upload a photo of your arm, leg, or back and overlay a tattoo design PNG to see how it looks in different positions before committing.
Email Subject Line Tester – Preview & Length Check
Type your email subject line and see how it will appear on mobile and desktop inboxes. Checks character limits and flags spammy words for better open rates.
Google SERP Snippet Preview – Title, Meta & URL
Enter your page title, meta description, and URL slug to see how they will appear in Google’s search results. Flag truncation and optimize for CTR.
Social Card Meta Tester - Online See Facebook, Twitter, LinkedIn Previews
Enter a URL and see live mocked previews for Facebook, Twitter, LinkedIn, and Slack based on its meta tags. Find missing tags.
GeoJSON Map Previewer - Online Render on Interactive Map
Paste GeoJSON and instantly see it drawn on a draggable map. Supports points, lines, and polygons. Local fetch of tiles.
Screen Reader Text Preview - Online See Hidden A11y Labels
Enter HTML with aria-labels and see what a screen reader would announce. Simulates common patterns. Local educational tool.
SEO Title & Meta Optimizer - Online Pixel Width Preview
See how your page title and description will look in Google SERP. Check pixel width and character count. Local tool.
Google Fonts Pairing Suggestions - Online Visual Tester
Select a heading font and see a set of well‑paired body fonts. Live preview with your own text. Copy the import code.
Local Font Viewer & Preview - Online Test Styles
Browse the fonts installed on your system and type a custom phrase to see how it looks. Uses Local Font Access API where available.
OpenAPI to HTML Preview - Online Swagger UI Generator
Paste an OpenAPI YAML/JSON and render a static, readable API document. No server, pure browser‑based rendering.
HDR Color Preview - Online See Wide Gamut Colors
Test if your display supports HDR colors by rendering a gradient in Rec.2020 space. See what you're missing. Canvas based.
CSS Animation Library Browser - Online Preview & Copy Keyframes
Browse a collection of ready-to-use CSS animations (fade, slide, bounce). Click to preview, then copy @keyframes and class to your project. Local tool.
Image to Laser Engraving Preview - Online Halftone Stipple
Apply a stipple or halftone effect to preview how an image might look when laser engraved. Download black‑and‑white output.
Open Graph Audit Tool - Online Check Social Meta
Enter a URL and see a preview of how it will appear when shared on Facebook, Twitter, LinkedIn. Detect missing tags.
Open Graph Debugger - Online Fetch & Preview Social Card
Enter a URL to see exactly what Open Graph and Twitter card tags will be shown when shared on social media. Fetch from browser.
CMYK Color Preview - Online See Print vs Screen
Preview how a CMYK value will look on screen (approximate). Compare with its RGB equivalent. Pre‑press check.
Twitter Card Previewer - Online See How Tweets Render
Enter a URL and fetch its Twitter card meta tags. See a live preview of how the tweet will appear. Debug social sharing.
HTML Includes Previewer - Online Simulate SSI Includes
Paste multiple HTML snippets (header, footer) and a main content, then combine them into a single preview. Static site helper.
Font Size Scale Preview - Online Typography Visualizer
Type a few words and see them rendered at every heading size (h1–h6) with your chosen font. Perfect for design systems.
Quilt Pattern Previewer - Online Fabric Layout Visualizer
Arrange virtual fabric squares or triangles on a grid to preview a quilt pattern. Change colors and sizes. Export layout.
Swagger/OpenAPI YAML Previewer - Online Render & Test
Paste your Swagger/OpenAPI YAML and see a rendered API documentation preview with expandable endpoints. All local rendering.
Lottie Animation Previewer - Online JSON Player
Paste Lottie JSON code or upload a .json file and see the animation play. Control speed and loop. Perfect for developers.