Base64 Encode/Decode Guide
Encode and decode plain text and files to Base64 format with full UTF-8 character and emoji support.
Overview
Encode text to Base64 or decode Base64 strings back to readable text with complete multi-byte UTF-8 support for accents, non-Latin scripts, and emojis.
When to Use Base64 Encode/Decode
Use Base64 Encode/Decode when transferring binary data through text-only protocols (like JSON, email, or HTTP headers) or debugging encoded API strings.
Inputs, Formats & Specifications
- Accepted Inputs
- Plain text, UTF-8 strings, or Base64 encoded strings
- Output Formats
- Base64 ASCII string (in Encode mode) or decoded original text (in Decode mode)
- Supported Standards
- RFC 4648 Base64, UTF-8 multi-lingual text
- Browser Limits & Scope
- Base64 increases data size by approximately 33%. Large binary files exceeding browser memory limits should be handled via native file streams.
How to use Base64 Encode/Decode
- Select your mode: 'Encode' (Text to Base64) or 'Decode' (Base64 to Text).
- Paste or type your input content into the source field.
- View the converted result immediately in real time with complete UTF-8 character encoding support.
- Click Copy Output to transfer the converted string to your clipboard.
Real-World Examples
Frequently Asked Questions
Is Base64 an encryption method?
No! Base64 is purely an encoding algorithm designed for data transmission, not data security. Anyone can decode a Base64 string instantly.
Does this handle emojis and foreign characters correctly?
Yes. Our implementation uses UTF-8 byte stream encoding so emojis, accents, and non-Latin scripts (Chinese, Arabic, Cyrillic) decode without character corruption.
Why do some Base64 strings end with `=` or `==`?
The `=` characters are padding bytes added to ensure the Base64 output length is a multiple of 4 characters, as required by the RFC 4648 standard.
Privacy & Data Security
Base64 Encode/Decode is designed to run in the browser. Review outputs before sharing them with any external service or workflow.