The latest articles on DEV Community by Eduardo Revilla Vaquero (@eduardo_revillavaquero_0). https://dev.to/eduardo_revillavaquero_0 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3805756%2Ffc601217-918f-4b97-866a-e8e1609eef5e.jpg https://dev.to/eduardo_revillavaquero_0 en Eduardo Revilla Vaquero Wed, 04 Mar 2026 12:17:33 +0000 https://dev.to/eduardo_revillavaquero_0/i-built-a-clipboard-manager-for-macos-that-replaces-5-different-tools-i39 https://dev.to/eduardo_revillavaquero_0/i-built-a-clipboard-manager-for-macos-that-replaces-5-different-tools-i39 <p>As a developer I was tired of switching between tools every time I needed to process something I copied. Format JSON? Open a website. Encode Base64? Another tab. Resize an image? Open Preview. Convert a hex color? Google it. So I built ClipMason, a clipboard manager for macOS that detects what you copy and offers contextual actions right there.</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4isebiactdqc5a3kplta.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4isebiactdqc5a3kplta.png" alt=" " width="800" height="500"></a></p> <p>How it works</p> <p>ClipMason lives in the menu bar. Every time you copy something, it detects the content type and shows relevant actions.</p> <p>Text (22+ actions)</p> <p>Case conversion: uppercase, lowercase, Title Case, camelCase, snake_case, kebab-case</p> <p>Encoding: Base64, URL encode/decode</p> <p>Formatting: JSON pretty print, JSON minify</p> <p>Hashing: MD5, SHA-256</p> <p>Lines: sort A-Z/Z-A, remove duplicates, remove blank lines</p> <p>Stats: character, word, and line count</p> <p>Images</p> <p>Resize with precise control (percentage or exact pixel dimensions)</p> <p>Rotate, flip, grayscale, invert colors</p> <p>Annotate with drawings</p> <p>Extract text with OCR</p> <p>Export as PNG or JPEG</p> <p>Colors<br> Copy a hex string like #FF5733? ClipMason detects it automatically and lets you convert to HEX, RGB, HSL, SwiftUI Color or CSS format.</p> <p>URLs</p> <p>Open in browser</p> <p>Extract domain</p> <p>Convert to Markdown link</p> <p>Files</p> <p>Open with default app</p> <p>Reveal in Finder</p> <p>Copy path for terminal use</p> <p>Tech stack</p> <p>SwiftUI for the UI, SwiftData for persistence, Swift 6 with strict concurrency. macOS 14+ native app, no Electron. 16 languages supported. Everything runs locally. No cloud, no tracking, no subscription.</p> <p>What I learned building it</p> <p>The hardest part was clipboard type detection. macOS puts multiple representations on the pasteboard simultaneously—for example, copying a file also puts a PNG icon on the clipboard. Getting the detection order right was tricky.</p> <p>Another challenge was image resizing on Retina displays. Using lockFocus() creates a 2x backing store, so a 100x100 resize produced 200x200. Switching to explicit NSBitmapImageRep with pixel dimensions fixed it.</p> <p>ClipMason is available on the Mac App Store as a one-time purchase. I'd love to hear what actions you'd find useful—I'm actively adding features based on feedback.</p> productivity showdev sideprojects tooling