refern. VS CSS Box-Shadow Code Generator

• Infinite Canvas
  Arrange references on an infinite spatial canvas with layers, text, and groups.
• Canvas Drawing & Shapes
  Freehand pen with pressure, eraser, 9 shape tools, and color swatches.
• In-App Image Cropping
  Crop images in place or save as a new copy, with crop provenance tracked.
• Image Filters
  Adjust brightness, contrast, saturation, and hue on images and canvas elements.
• Never Copies Your Files
  References images from your own folders. No proprietary library, no doubled disk.
• Relationship Graph View
  Navigate your library as a graph of folders, tags, canvases, and linked images.
• Visual Similarity Search
  Find similar images locally with a built-in feature vector. No uploads, no API cost.
• Color Search
  Search your library by hex code or dominant color with fast local scoring.
• Operator Search
  Full-text search with 16 inline operators like type:, tag:, rating:>=3, and color:.
• Hierarchical Tags
  Parent-child hierarchies, tag groups, linked tags, and macros for bulk tagging.
• Smart Folders
  Saved multi-condition searches that stay up to date automatically.
• Image Grouping
  Stack related references into groups shown as fan cards in the grid.
• Cross-References & Backlinks
  Link any asset to any other and see backlinks across folders and canvases.
• Grid Layout Modes
  Masonry, justified, and horizontal layouts, set globally or per folder.
• Duplicate Detection
  Find duplicate images by perceptual hash with an is:duplicate query.
• Metadata Management
  Rating, color labels, description, notes, source URL, creator, and custom fields.
• Directory Metadata Presets
  Auto-apply tags and metadata when files are added to a folder.
• EXIF / IPTC / XMP Import
  Read embedded tags and ratings from images for DAM interoperability.
• Import Staging
  Drag, drop, or paste images into a staging area with metadata pre-fill and dedup.
• Browser Extension
  Save images from the web with hover buttons and batch save (Chrome, Firefox, Safari).
• Eagle Import
  Migrate an existing Eagle library into refern.
• Disk Sync
  Detect external file changes and reconcile your library with what is on disk.
• Timed Study Mode
  Full-screen reference practice sessions with configurable duration and count.
• Pin Window On Top
  Always-on-top mode keeps references visible while you work.
• Window Transparency
  Adjustable window opacity for overlay reference.
• Click-Through Mode
  Interact with apps beneath the transparent window.
• Desktop Screenshot Tool
  Capture your screen directly into your library.
• Scales to Millions of Images
  Streaming indexer handles 2M+ file libraries with bounded memory.
• RAW & HEIC Support
  Decodes camera RAW, HEIC, SVG, and standard image formats into thumbnails.
• Directory Customization
  Custom folder icons, cover images, and backgrounds in the tree and grid.
• Local-First & Private
  Works fully offline. No account, no telemetry. Files stay on your disk.

• Visual real-time preview
  The generator provides an instant visual preview of the box-shadow effect as you adjust the parameters, allowing users to see exactly how their shadow will look before copying the code.
• Simple and intuitive interface
  The tool has a clean, straightforward interface with sliders and input fields that make it easy for beginners and experienced developers alike to create box-shadow effects without memorizing CSS syntax.
• Free and browser-based
  The tool is completely free to use and runs entirely in the browser with no installation, sign-up, or downloads required, making it instantly accessible to anyone.
• Quick code output
  The generator produces ready-to-use CSS box-shadow code that can be copied and pasted directly into a stylesheet, saving development time and reducing syntax errors.
• Adjustable parameters
  Users can easily tweak key shadow properties such as horizontal offset, vertical offset, blur radius, spread radius, and color to fine-tune the exact shadow effect they need.

Possible disadvantages

• Limited to single shadow
  The tool appears to only support generating a single box-shadow value at a time, whereas CSS allows multiple comma-separated shadows for more complex effects.
• Minimal styling options
  The generator focuses solely on box-shadow and doesn't include related CSS properties like border-radius or background color adjustments that could help users visualize the shadow in a more realistic context.
• No preset examples
  The tool lacks a library of pre-built shadow presets or templates that users could use as starting points, which would speed up the design process for common shadow styles.
• Basic UI design
  The interface is quite minimal and could benefit from a more polished, modern design with better visual hierarchy and additional guidance or tooltips for less experienced users.
• No export or save functionality
  There is no built-in way to save, bookmark, or export multiple shadow configurations for later comparison or use, so users must manually copy and store their generated values elsewhere.