Base64 Encoder/Decoder
Encode and decode text using Base64
Input
Output
What is a Base64 Encoder/Decoder?
Base64 is a binary-to-text encoding scheme that converts binary data (like files or arbitrary bytes) into a text representation using 64 readable characters. It’s commonly used in web development for embedding images in HTML/CSS, including small assets in JSON payloads, and safely transmitting data over systems that expect plain text.
Key Features
- Instant Base64 encode and decode for any text input
- One-click copy and convenient encode/decode toggling
- No data leaves your browser—privacy-friendly by design
- Works on desktop and mobile, no sign-up required
How It Works
- Type or paste your text into the Input area.
- Select Encode to convert to Base64, or Decode to convert from Base64.
- Copy the result or swap input/output as needed.
Examples
Encode example
Input: Hello, ToolsByte!
Output: SGVsbG8sIFRvb2xzQnl0ZSE=
Decode example
Input: U2VjcmV0OjEyMy1BcGkta2V5
Output: Secret:123-Api-key
Common Use Cases
Embedding assets
Convert small images or SVGs to Base64 to inline them in HTML, CSS, or JSON, reducing extra requests for tiny assets.
Safe text transport
Wrap arbitrary text in Base64 to pass it through systems that expect plain text without breaking special characters.
Privacy & Security
All encoding and decoding happen locally in your browser. We do not upload, store, or log your input or output. Base64 is an encoding—not encryption—so don’t use it as a security control for secrets.
Frequently Asked Questions
Is Base64 the same as encryption?
No. Base64 is a reversible text encoding. It’s not designed to keep data secret—only to represent binary data as text.
Are there size limits?
Base64 output is ~33% larger than the original data. It’s best for small or moderate payloads—not large files.
Does my data leave the browser?
No. Processing is client-side only. Your data never leaves your device.