Optional, for higher precision
Chrome Extension
ShotArt already stitches long screenshots without it. The extension adds pixel-exact scroll telemetry for pages that are hard to get perfectly seamless — especially ones with sticky headers.
Sideloaded via GitHub Releases · Chrome Web Store listing coming later
Why install it
ShotArt's built-in long-screenshot capture works by cross-correlating row brightness between frames, which is robust but occasionally imperfect on pages with sticky headers, sticky columns, or repeating rows that look alike. The extension reports the exact scroll position back to ShotArt after every scroll step, so the app knows precisely how far the page moved instead of estimating it — that means seam-perfect stitching, particularly on pages where the estimator alone struggles.
Install
- 1
Download the extension zip
Grab the latest release from GitHub Releases and unzip it.
- 2
Open chrome://extensions
Type chrome://extensions into your address bar and press Enter.
- 3
Enable Developer mode
Toggle Developer mode on in the top-right corner of the page.
- 4
Load unpacked
Click "Load unpacked" and select the unzipped extension folder (or drag the folder onto the page).
Pair with ShotArt
- 1
Open ShotArt Settings
In the Mac app, go to Settings and find the Extension section.
- 2
Copy the pairing token
Click to copy the one-time token shown there.
- 3
Paste it into the extension Options
Click the ShotArt extension icon, open Options, and paste the token in.
- 4
Confirm the connection
The status indicator turns to "Connected" once ShotArt and the extension have paired.
Troubleshooting
- ShotArt must be running on your Mac — the extension talks to the local app, not a cloud service.
- If pairing fails, double-check the token matches exactly; tokens are single-use and regenerate each time you open Settings.
- The extension connects over localhost — if a firewall or security tool blocks local connections, allow ShotArt to accept them.