Text to Base64 Encoder
Encode text strings for APIs and data transfer
Input (Text or File)
0 charactersDrop file or click to browse
Max size: 10MB • Any file type supported
Output (Base64)
0 charactersSecure
All processing happens in your browser. No data is sent to servers.
Fast
Live preview with instant encoding and decoding as you type.
Files
Support for images, PDFs, and documents up to 10MB.
What is Text to Base64?
Base64 text encoding converts strings to a universal ASCII representation safe for transmission through systems that might corrupt binary or special characters. While URLs have their own encoding, Base64 serves as a general-purpose armored transport.
The encoding is reversible—decode any base64 string back to its original text. This makes it suitable for data you need to transport safely and then use normally at the destination.
Why Encode Text?
APIs frequently require base64-encoded payloads, especially for authentication. Basic Auth headers use Base64 encoded username:password. JWT token payloads are base64-encoded JSON. Data URIs for non-image content use base64.
Base64 also obscures (not encrypts) data from casual viewing. While not secure, it prevents accidental interpretation of special characters and makes raw data less immediately readable.
How It Works
JavaScript provides native functions:
// Encode btoa('Hello World') → 'SGVsbG8gV29ybGQ='
// Decode atob('SGVsbG8gV29ybGQ=') → 'Hello World'
For Unicode text (non-ASCII characters), escape first:
btoa(encodeURIComponent('Привет')) → encoded safely
Our tool handles Unicode automatically, producing valid base64 for any text input.
Common Use Cases
- API authentication headers
- JWT payload inspection
- Data transfer through limited channels
- Obfuscating configuration strings
Pro Tip
Always handle base64 decoding in try-catch blocks—invalid base64 strings throw errors that could crash your application.
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