# Card Caliper

> Measure trading-card centering with adjustable guides and local edge detection. Works for card images on any website.

Canonical page: [https://chrome-stats.com/d/card-caliper](https://chrome-stats.com/d/card-caliper)

## Overview

- **ID:** `card-caliper`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** frighten
- **Category:** shopping,games-entertainment
- **Daily users:** 1
- **Version:** 0.6.0
- **Last updated:** 2026-08-16
- **First published:** 2026-08-13
- **Size:** 12 MB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/card-caliper/)

## Description

Card Caliper helps collectors inspect left/right and top/bottom card centering without downloading photos or sending them to another service.

Right-click a trading-card image and choose Card Caliper. The extension opens a focused measurement view with adjustable outer-card and inner-print guides, centering percentages, zoom and pan controls, image rotation, an optional grid, and configurable guide styling.

Card Caliper can estimate the outer card edge and printed border locally. Automatic results are a starting point, not a professional grade; every guide remains manually adjustable for glare, sleeves, holders, perspective, and unusual card designs.

## Rankings

- #111,645 — Overall
- #81 — card

## Permissions and access

### Permissions

- `contextMenus`
- `storage`
- `activeTab`
- `scripting`

## Safety

- **Risk impact:** Very low risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [PeekaScan](https://chrome-stats.com/d/peekascan) — 4 users, 5.00 / 5
- [Cardmarket Cantrip](https://chrome-stats.com/d/cardmarket-cantrip) — 1 users
- [TCG Connect Browser Extension](https://chrome-stats.com/d/tcgconnect-browser-extension) — 4 users
- [Cardmarket Helper](https://chrome-stats.com/d/cardmarket-helper) — 276 users, 5.00 / 5
- [Specto Ruler](https://chrome-stats.com/d/specto-ruler) — 5 users
- [Cardmarket Helper](https://chrome-stats.com/d/cardmarket-assistant) — 276 users, 5.00 / 5
- [Manual Card Counter – Bridge](https://chrome-stats.com/d/manual-card-counter-bridge) — 1 users
- [Pixel Measurement Tool](https://chrome-stats.com/d/pixel-measurement-tool) — 128 users
- [CardTrader Cart Enhancer](https://chrome-stats.com/d/cardtrader-cart-enhancer) — 2 users
- [CM Helper by LastDraw](https://chrome-stats.com/d/cm-helper-by-lastdraw) — 11 users
- [Cardmarket Companion: Pricing & Order Tools](https://chrome-stats.com/d/cardmarket-companion) — 69 users, 5.00 / 5
- [Metis](https://chrome-stats.com/d/metis-tool) — 2 users

---

Source: [Chrome-Stats](https://chrome-stats.com/d/card-caliper)