Free Base64 Encoder & Decoder
Convert text to Base64 encoding and back. Essential for data transmission, embedding content, and working with APIs that require Base64-encoded data. No signup required.
100% free — runs entirely in your browser
Input
0 chars
Output
Free Base64 Encoder & Decoder Features
Encode and decode Base64 data with full Unicode support
Base64 to Text
Decode Base64 strings back to their original readable text content.
Text to Base64
Convert any text, including Unicode characters and emojis, to Base64 encoding.
Client-Side Only
All processing happens in your browser. Your data never leaves your device.
Full Unicode Support
Handles multi-byte characters, emojis, and international text correctly.
Frequently Asked Questions
What is Base64 encoding used for?
Base64 is used to encode binary data as ASCII text. Common uses include embedding images in CSS/HTML, transmitting data in JSON/XML, email attachments (MIME), and API authentication tokens.
Does Base64 increase data size?
Yes, Base64 encoding increases data size by approximately 33%. A 3-byte input becomes 4 ASCII characters. This is the trade-off for safe text-based transmission.
Is Base64 encryption?
No. Base64 is an encoding scheme, not encryption. It's easily reversible and provides no security. Never use it to protect sensitive data.
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