Base64 Encoder/Decoder
Encode or decode text to/from Base64 format. Ideal for developers, data encoding, and secure data transfer.
Enter Text to Encode/Decode
Base64 Output
Enter text to encode or decode Base64
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What is Base64 Encoding?
Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format. By translating complex data (like images or compiled code) into a standard 64-character alphabet (A-Z, a-z, 0-9, +, /), Base64 ensures that the data remains intact without modification during transport.
Our Base64 Encoder/Decoder is a critical utility for developers. It allows you to quickly translate plain text into a Base64 string, or take a messy Base64 string and decode it back into readable text.
Common Use Cases
- API Authentication: Many APIs (like HTTP Basic Auth) require API keys or username/password combinations to be transmitted as Base64 encoded strings in the header.
- Data Embedding: Frontend developers often convert small SVG icons or background images into Base64 to embed them directly into CSS or HTML files, saving a network request.
- Email Attachments: The MIME standard uses Base64 to encode binary files (like PDFs or images) so they can be safely sent via email text protocols.
How to Use the Tool
- Paste your original text (for encoding) or your Base64 string (for decoding) into the large input area.
- Click "Encode to Base64" if you want to generate a Base64 string.
- Click "Decode from Base64" if you want to read the original text behind a Base64 string.
- Copy your result from the output box below.
Frequently Asked Questions (FAQ)
Is Base64 considered encryption?
No. Base64 is an encoding scheme, not encryption. It does not require a key to decode, meaning anyone who finds your Base64 string can easily decode it. Never use Base64 to hide sensitive data like passwords or credit card numbers without encrypting them first.
Why does my Base64 string end with "=" signs?
The equals signs (= or ==) at the end of a Base64 string are padding characters. Base64 processes data in 24-bit chunks. If the input data isn't perfectly divisible by 24 bits, these padding characters are added so the decoder knows how to correctly reconstruct the end of the file.
Why is the encoded data larger than the original?
Because Base64 uses 4 ASCII characters to represent every 3 bytes of raw data, the resulting encoded string will always be roughly 33% larger than the original input data. This is an accepted trade-off for safe data transport.