Base64 Encoder/Decoder (Free, Instant)
Encode or decode Base64 text in one tool.
💡 Common Uses:
- Embed images in HTML/CSS without separate files
- Send binary data over text-only protocols
- Store complex data in URLs or cookies
- Encode API credentials or tokens
Why Use Base64 Encoding/Decoding?
Base64 is a binary-to-text encoding that converts data (text, images, files) into ASCII characters (A-Z, a-z, 0-9, +, /) for safe transmission in URLs, emails, JSON, and HTTP headers. A combined encoder/decoder tool lets you encode text for APIs, then decode responses—all in one place without switching tools.
Common Use Cases
- API development: Encode authentication credentials for Basic Auth headers (Authorization: Basic base64)
- JWT debugging: Decode JWT header/payload sections to inspect claims without signature verification
- Data URIs: Encode images or files as Base64 for embedding in HTML/CSS
- Email encoding: Encode/decode MIME attachments in email protocols
- URL parameters: Encode binary data for safe transmission in URL query strings
- Database storage: Encode binary data for storage in text columns
Why This Tool?
- Bi directional: Encode and decode in one tool—no page switching
- Instant conversion: Real-time encoding/decoding as you type
- 100% client-side: Your data never touches our servers
- No file size limits: Encode/decode any length of text
- Free forever: Unlimited encoding/decoding with no rate limits
Pro tip: For JWT token decoding with validation, use our JWT Decoder. For image encoding, try Image to Base64 Converter.