Base64 Decoder by PlatinumSif
Simplify your workflow with one-click decoding. This extension is a lightweight tool designed for developers, security researchers, and enthusiasts who frequently encounter Base64 encoded strings. Decode in a snahp!
Extension Metadata
About this extension
Base64 Decoder
Key Features:
How to Use
Method 1: The Right-Click Menu
Method 2: The Toolbar Button
Key Features:
In-Place Replacement: Swap scrambled Base64 strings with readable text without leaving the page.
Context Menu Integration: Quick access via a simple right-click.
Toolbar Shortcut: Use the pinned icon to decode your current selection instantly.
Privacy-First: Processes all data locally on your machine. No data is collected, stored, or transmitted.
How to Use
Method 1: The Right-Click Menu
Highlight any Base64 encoded string on a webpage (e.g., WW91J3JlIGJyZWF0aHRha2luZyE=).
Right-click the highlighted text.
Select "Decode and Replace Base64" from the menu.
The encoded text will instantly be replaced by the decoded version.
Method 2: The Toolbar Button
Highlight the Base64 string you wish to decode.
Click the Base64 Decoder icon (the blue gear with "64") in your Firefox toolbar.
The text on the page will update automatically.
Note: If you don't see the icon, click the puzzle piece (Extensions) icon and pin the "Base64 Decoder" to your toolbar.
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Permissions and data
Required permissions:
- Access your data for all web sites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Version
- 1.7
- Size
- 23.71 kB
- Last updated
- 6 days ago (15 Mar 2026)
- Related Categories
- Licence
- MIT Licence
- Version History
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