Base64 Encoder & Decoder
Encode and decode Base64 strings and files
✓ Runs 100% in your browser — no data sent to serversFrequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that converts binary data into ASCII text format. It's commonly used to encode images, files, or binary data for transmission over text-based protocols like email or JSON APIs.
When should I use Base64 encoding?
Use Base64 when you need to transmit binary data through text-only channels, embed images in HTML/CSS, store binary data in JSON, or send files via APIs that only accept text. Note that Base64 increases data size by about 33%.
How do I decode a Base64 string?
Simply paste your Base64 string into the input field and click "Decode". The tool will automatically convert it back to the original text or show you the decoded content. If it's binary data, you'll see a representation of it.
Can I encode files to Base64?
Yes! Click the "File" button to select any file from your computer. The tool will read the file and encode it to Base64. This is useful for embedding images in CSS or creating data URIs.
Is my data safe when using this tool?
Absolutely. This tool runs entirely in your browser using JavaScript. Your data never leaves your device or gets uploaded to any server. All encoding and decoding happens locally on your computer.
What does the AI Detect feature do?
The AI Detect feature analyzes decoded Base64 content and identifies what type of data it appears to be (e.g., JSON, XML, image data, credentials, etc.). This is helpful when you receive Base64 data and aren't sure what it contains.