Supports real-time bidirectional conversion between text and Base64, one-click copy, local processing without server upload, secure and reliable
Instant conversion on input, millisecond response
Text to Base64 and Base64 to text, one-click switch
One-click copy results to clipboard
All conversion done locally, no server upload
Based on standard Base64 algorithm, compatible across languages
Works on any device with browser, no software installation
Choose conversion direction on tool page. "Text → Base64" for encoding, "Base64 → Text" for decoding. Click to switch as needed.
Enter text to encode or Base64 string to decode in the input box. Conversion happens automatically as you type.
Conversion result displays instantly. Click "Copy" button to copy result, or click "Swap" to reverse input/output for opposite conversion.
Encode email attachments and content
Encode data for safe transmission
Convert images to Base64 for embedding
Encode API keys and credentials
Embed resources in HTML/CSS
Store binary data as text format
Base64 is a binary-to-text encoding scheme that converts binary data into ASCII string format. It uses 64 characters (A-Z, a-z, 0-9, +, /) to represent data, with = for padding. Base64 is commonly used to encode data for transmission over media designed to handle text.
Base64 encoding ensures data integrity when transmitted through systems that only handle text. It converts binary data (images, files) into ASCII characters that can be safely transmitted over email, HTTP, and other text-based protocols without corruption.
Base64 encoding increases data size by about 33% (3 bytes become 4 characters). It's not encryption, just encoding - anyone can decode Base64. For security, use encryption before Base64 encoding. Base64 is widely used in email attachments, data URLs, and API authentication.