Base64 Decoder & Encoder
Paste text or choose a file to decode Base64 and encode UTF-8 text or raw file bytes without using a server.
Operation
Variant
0 input bytes
Drop a file here
Choose a text file containing Base64. The decoded result may be text or binary.
Decoded output
Input and output stay in this browser. Content is never stored or uploaded.
One Base64 tool, two directions
Decode and Encode are two capabilities of the same Base64 plugin. Switching mode keeps one consistent workspace and avoids duplicate tools.
Current scope
- Encodes UTF-8 text or raw file bytes to standard Base64 or unpadded Base64URL.
- Decodes standard Base64 and Base64URL, including whitespace and missing padding repair.
- Binary output is available as a lossless download with a limited hex preview.
- Batch processing, nested detection, and specialist repair workflows will be added separately.