Base64 Decoder
Decode Base64 strings to text instantly. Features smart image/JSON preview, multi-format output, and auto-clean.
Why Use Our Base64 Decoder?
The smartest online Base64 Decoder with magic previews, auto-cleaning, and multi-format viewing.
Magic Live Preview
Automatically detects and renders Images, formats JSON, and previews HTML directly from decoded Base64 strings.
Smart Auto-Clean
Automatically removes messy spaces, line breaks, and invalid characters from pasted strings before decoding.
Multi-Format Output
View your decoded data not just as text, but also instantly convert it to Hexadecimal or Binary formats.
Real-Time Decoding
Get instant results as you type or paste. No need to repeatedly click buttons for every small change.
Decode History
Automatically saves your recent decodes locally so you can quickly restore them if you accidentally clear the screen.
100% Client-Side Privacy
Your sensitive encoded data is processed entirely in your browser and never sent to any external server.
Frequently Asked Questions
Base64 decoding is the process of converting Base64 encoded text back to its original form. Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format, commonly used for embedding images in CSS/HTML or transmitting data over email.
Our tool automatically detects the type of decoded data. If it's an image (starts with data:image), it renders a live image preview. If it's JSON, it formats it beautifully. If it's HTML, it shows a safe rendered preview. This saves you from copying the output to another tool.
Yes, absolutely! This tool runs entirely in your browser using client-side JavaScript. Your data is never sent to our servers or any third party, making it 100% secure for decoding passwords, API keys, or private documents.
When you copy Base64 strings from emails or PDFs, they often contain hidden spaces, line breaks, or prefix text. Our Auto-Clean feature automatically strips these out before decoding, preventing "Invalid Base64" errors.