Base64 Encoder & Decoder
Encode strings and files into Base64 format or decode Base64 back to plain human-readable UTF-8 text with full Unicode support.
Base64 Encoder & Decoder Workspace
This client-side utility is staged and ready for local processing. Files and inputs are processed exclusively on your device without server transmission.
Drag & drop input here or click to select
Supports standard formats • 100% private in-browser memory
Browser Client (Wasm / Web API)
Zero remote server calls
Uncapped (Hardware RAM)
No artificial 5MB limits
0 ms (Discarded on Exit)
Never written to any database
How to use Base64 Encoder & Decoder
Choose mode
Select 'Encode' to create Base64 or 'Decode' to inspect Base64.
Provide input
Type or paste your input into the source box.
Get result
The transformed data appears in real-time ready to copy.
Built for speed, accuracy, and complete privacy
Common questions about Base64 Encoder & Decoder
Yes, our encoder properly handles multi-byte UTF-8 character sequences, including accented letters, Asian scripts, and emojis.