About Base64 Encoder & Decoder (UTF-8 Safe)
Convert UTF-8 text, special unicode symbols, and binary data to Base64 format and decode Base64 back to readable text. Supports URL-safe mode (- and _) and standard 76-character line wrapping.
Key Capabilities & Features
- Full UTF-8 support: Safely encodes and decodes unicode and emojis without crashing
- URL-safe Base64 mode (replaces + with - and / with _)
- MIME 76-character line wrapping option
- Swap input and output with one click
- Save and download as text file
How to Use Base64 Encoder & Decoder (UTF-8 Safe)
Choose Mode
Select Encode to Base64 or Decode from Base64.
Input String
Type or paste text or Base64 payload.
Copy or Save
Copy the converted output or download as a text file.
Privacy & In-Browser Execution Guarantee
Executed 100% in browser memory using Web API TextEncoder/TextDecoder. Zero network transmission.
Frequently Asked Questions
Is Base64 a form of encryption?
No. Base64 is an encoding format designed to transmit binary data over text-only protocols. It provides no confidentiality and can be decoded by anyone.
What is the difference between Base64 and Base64URL?
Base64URL substitutes '+' with '-' and '/' with '_', and omits padding '=' characters, making it safe for URLs, filenames, and JWT headers.
Does this tool support emojis and non-English UTF-8 characters?
Yes. Our encoder uses modern TextEncoder and TextDecoder APIs to safely handle Unicode, accents, and emojis without UTF-8 corruption.