# KeyDecoder

> Decode your keys from a picture in seconds

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

## Overview

- **ID:** `com.keydecoder`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** FrenchKey
- **Category:** BUSINESS
- **Downloads:** 45,980
- **Rating:** 3.22 / 5 (124 ratings)
- **Version:** 1.1.0
- **Last updated:** 2024-02-04
- **First published:** 2020-12-20
- **Publisher country:** FR
- **Size:** 39 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.keydecoder)
- **Website:** [https://intrusion.eu](https://intrusion.eu/)
- **Privacy policy:** [https://github.com/MaximeBeasse/KeyDecoder/blob/master/LICENSE](https://github.com/MaximeBeasse/KeyDecoder/blob/master/LICENSE)

## Description

KeyDecoder is a powerful Chrome extension that transforms your smartphone or tablet into a precise mechanical key decoder. Simply place your key on an ISO-sized card, capture a photo, and mark key features within the app. Within a minute, KeyDecoder delivers accurate key cuts with a precision of 0.1mm or less, dependent on photo quality and lighting conditions.

This free and open-source tool is perfect for penetration testers conducting legal physical intrusion assessments and anyone needing to decode keys securely. Released under the Aladdin Free Public License, its source code is fully accessible on GitHub. Emphasizing security, users are advised to treat their keys with the same care as passwords to prevent unauthorized duplication.

## Rankings

- #309,494 — Overall

## Permissions and access

### Permissions

- `android.permission.READ_EXTERNAL_STORAGE`
- `android.permission.WRITE_EXTERNAL_STORAGE`
- `com.keydecoder.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

Users find KeyDecoder simple and useful for decoding keys and taking notes, especially in locksport. However, multiple reviews mention difficulties with aligning the grid properly, inaccurate cropping, and problems with the import picture function. The app's measurement reference based on credit cards rather than direct key blanks causes confusion. Lack of project deletion also frustrates users. While not as accurate or fast as physical gauges, it serves as a free alternative and works well once users understand how to use it properly.

### Pros

- Simple and convenient to use after initial learning curve
- Helps take notes and perform key decoding useful for lock sport and cutting keys
- Provides a free alternative to other key decoding apps
- Gives accurate readings once properly aligned
- Helpful for keys that are uncommon or require detailed measurements

### Cons

- Difficult to align grid correctly leading to crop or measurement errors
- Lack of ability to delete projects causes inconvenience
- Importing pictures feature is buggy or non-functional
- Measurement system based on credit card reference instead of key blank or precise units causes confusion
- App can be cumbersome and less accurate compared to dedicated physical gauges

## Similar extensions and apps

- [Snap Decoder](https://chrome-stats.com/d/com.whsoftware.snapdecoder) — 72,175 users, 2.76 / 5
- [Keyscutter](https://chrome-stats.com/d/com.keyscutter) — 2,150 users
- [Key Decoder Camera & Logbook](https://chrome-stats.com/d/dev.slashbox.keydecodercamera) — 1,084 users
- [Decode – NFC Scanner](https://chrome-stats.com/d/com.bluebite.decode) — 40,359 users, 3.25 / 5
- [Message Coder](https://chrome-stats.com/d/com.wwilczyn.messagecoder) — 110 users
- [Keycard Tool](https://chrome-stats.com/d/com.melogic.keycardtool) — 10,460 users
- [DigitalKey](https://chrome-stats.com/d/cl.cloudbase.digitalkey) — 11 users
- [Key Inspector](https://chrome-stats.com/d/com.abrites.keyinspector) — 41 users
- [codeREADr KEY - Scan to Field](https://chrome-stats.com/d/com.codereadr.apps.scantofield) — 1,101 users
- [ErrebiKeyReader](https://chrome-stats.com/d/it.errebi.keyreader) — 77 users
- [Key](https://chrome-stats.com/d/com.interflex.key) — 18,583 users
- [APP DO CHAVEIRO](https://chrome-stats.com/d/com.inforizz.app_key_conversion) — 15,115 users

---

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