CstWeave

Record any tab region to GIF & WebM. 100% on-device, no uploads, no watermarks. Lite is free; Pro unlocks HD WebM.

CstWeave is the fastest, most private tab region recorder for Google Chrome. Draw a rectangle over any part of your active webpage and instantly export lightweight GIFs or high-definition WebM videos — 100% on-device with zero server uploads, zero watermarks, and zero account sign-ups. Whether you're demonstrating a UI bug to your engineering team, creating animated documentation for Notion, sharing product demos on Slack, or attaching visual repro steps to GitHub issues, CstWeave delivers crisp, professional captures in seconds. -------------------------------------------------- 100% ON-DEVICE & LOCAL PRIVACY -------------------------------------------------- Unlike cloud-based screen recorders (Loom, Screenify, Loom, Screencastify) that upload your video streams to remote servers, CstWeave processes 100% of your capture data inside your browser's local RAM: • Zero video uploads or server processing • Zero telemetry, tracking scripts, or analytics • Zero watermarks on any tier • Works offline on private intranets and local dev servers • Minimal Manifest Permissions: Only 4 core permissions requested (tabCapture, offscreen, storage, downloads). Zero host permissions requested (<all_urls> is NOT required). -------------------------------------------------- KEY FEATURES -------------------------------------------------- • Regional Tab Snip: Select any area of your active browser tab without exposing your entire desktop, bookmark bar, or private browser tabs. • Instant Keyboard Shortcut: Press Alt+Shift+G (Mac: ⌥+Shift+G) to trigger the selector overlay on any page. • Offscreen Rendering Engine: Built on Chrome's native Offscreen Document API (chrome.offscreen) so frame capture runs on a background thread without slowing down your active page. • One-Click Copy to Clipboard: Copy animated GIFs straight to your clipboard and paste them directly into Slack, Figma, GitHub, or Notion. • WebM & System Audio (Pro): Capture high-definition WebM video clips synchronized with desktop and tab system audio. • Floyd-Steinberg Dithering: Smooth color gradients and eliminate color banding in complex UI recordings. • Customizable Palette Sizing: Choose 32, 64, 128, or 256 colors to optimize file size without sacrificing clarity. • Resolution Scaling: Choose 25%, 50%, 75%, or 100% full-resolution capture output. • Meme Captions & Subtitles (New in v2.1.0): Burn top/bottom Impact meme text or dark subtitle bars directly onto your clips with crisp stroke outlines and real-time live preview. • Zero-Network Security Audit: Verify network isolation yourself — open Chrome DevTools Network tab while recording to confirm 0 remote network calls leave your device. • Offscreen RAM Bounds Protection: Memory-capped frame buffers prevent MV3 offscreen OOM crashes even during high-DPI 60 FPS captures. -------------------------------------------------- LITE (FREE) VS PRO ($9.99 ONE-TIME) -------------------------------------------------- Meme Captions & Subtitle Overlays (Lite includes standard Impact meme & subtitle bars; Pro unlocks custom fonts, custom text/stroke colors, and font sizing) CstWeave Lite is free forever for private GIF region recording: • LITE (Free Forever): - GIF region recording up to 5 seconds - Up to 15 FPS frame rate - Up to 75% resolution scaling - 100% local encoding, zero watermarks, zero ads • PRO ($9.99 Lifetime — One-time payment): - HD WebM video recording - System and tab audio capture - Extended recording durations up to 120 seconds - Higher frame rates up to 60 FPS - 100% full-resolution output - One license key unlocks all Pro features forever -------------------------------------------------- HOW TO USE -------------------------------------------------- 1. Press Alt+Shift+G (Mac: ⌥+Shift+G) or click the CstWeave extension icon. 2. Click and drag your mouse to outline the capture region. 3. Click "Record". 4. Click "Stop" when finished. 5. Click "Copy GIF" or "Download" to save your recording locally. -------------------------------------------------- SUPPORT & RELEASES -------------------------------------------------- • Website: https://cstweave.com • FAQ & Help: https://cstweave.com/faq • Privacy Policy: https://cstweave.com/privacy • Release Notes: https://cstweave.com/releases • Support Email: fujidevv@duck.com