Base64 Encoder & Decoder
Encode any text or URL to Base64 format, or decode any Base64 string back to plain text. Essential for developers working with APIs, authentication, and data transmission.
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Base64 Encoder / Decoder
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Guide
How to Use Base64 Encoder / Decoder
Choose Mode
Select "Encode" to convert text to Base64, or "Decode" to convert Base64 back to text.
Enter Text
Type or paste the text you want to encode/decode.
Get Result
The encoded or decoded result appears instantly.
Copy
Click the copy button to copy the result to your clipboard.
Frequently Asked Questions
Base64 is a binary-to-text encoding scheme that converts binary data (or any text) into an ASCII string using 64 characters (A-Z, a-z, 0-9, +, /). It's used to transmit data safely over text-based protocols.
Use Base64 when embedding binary data in JSON/XML, encoding images for data URLs, handling HTTP Basic Auth credentials, or transmitting binary data over email (MIME).
No! Base64 is encoding, not encryption. It's easily reversible and provides zero security. Anyone with the Base64 string can decode it instantly.
Base64URL replaces "+" with "-" and "/" with "_" to make the string URL-safe (no special characters that need URL encoding). JWTs use Base64URL encoding.
Base64 encodes 3 bytes at a time into 4 characters. If input isn't a multiple of 3 bytes, "=" padding characters are added to make the output length a multiple of 4.