321 Action - Professional Screenshots

About

321 Action — Professional Screenshots

Stop cropping in Photoshop. 321 Action lets you frame any part of a webpage and capture it at the exact pixel dimensions you need — Instagram square, YouTube thumbnail, Open Graph image, LinkedIn post, or any custom size you type in.

Position the frame, hit Action, and a cinematic 3·2·1 countdown fires the shot. The result lands in your Downloads folder, perfectly sized, ready to post.


BUILT-IN PRESETS

Every common size, ready to go:

• Instagram — Square (1080×1080), Portrait (1080×1350), Story (1080×1920)
• X / Twitter Post — 1600×900
• Facebook Post — 1200×630
• LinkedIn Post — 1200×627
• YouTube Thumbnail — 1280×720
• Open Graph image — 1200×630
• Pinterest Pin — 1000×1500
• Wallpaper FHD — 1920×1080


CUSTOM DIMENSIONS, CUSTOM SHAPES

Need something off-spec? Switch to the Custom tab and enter any width/height up to 8192px. Pick Rectangle, Square, or Circle — the circle output is masked with a clean alpha edge, perfect for avatars and profile photos.


HOW IT WORKS

1. Click the 321 Action icon in your toolbar.
2. Pick a preset or enter custom dimensions.
3. Drag the on-page frame to the area you want. Aspect ratio is locked to your target.
4. Hit Action (or press Enter). A 3·2·1 countdown plays, the overlay disappears, and the screenshot is captured at the full pixel resolution of your target — no upscaling, no blur.
5. The PNG saves automatically to your Downloads folder, named with size and timestamp.

Press Esc at any time to cancel.


WHY IT'S DIFFERENT

• Exact target dimensions, not "close enough." The image is rendered at the preset's true pixel size, so you upload directly without resizing in another tool.
• DPI-aware. Works correctly on Retina and HiDPI displays — what you frame is what you get.
• One-click presets for every major platform.
• Cinematic capture flow. The 3·2·1 Action countdown gives you a beat to clear hover states, dropdowns, or cursor halos before the shot fires.
• Circle masking for avatar-ready exports.
• Zero friction. No login, no account, no cloud upload.


PRIVACY

321 Action is 100% local. Your screenshots never leave your browser. Nothing is uploaded, no analytics, no tracking, no account required. The extension only does anything when YOU click its icon on the active tab.


PERMISSIONS EXPLAINED

We ask for the absolute minimum:

• activeTab — so we can capture the tab you're currently looking at, and only when you trigger us.
• scripting — to draw the framing overlay on top of the page.
• downloads — to save the finished PNG to your Downloads folder.

No host permissions, no background data collection, no access to other tabs.