Convert Base64 strings back into original file formats. Supports images, PDFs, audio, video, and more.
Paste the Base64 code below
File details and preview will appear here
Wait for decoding...
Enter Base64 string and click 'Decode'
Welcome to the most comprehensive Base64 to File Converter available online. Whether you are a developer debugging an API, a designer extracting assets from a stylesheet, or an everyday user trying to recover a file from an email, our tool provides a seamless, secure, and lightning-fast way to turn Base64 strings back into their original binary formats.
Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format. While Base64 is excellent for transmitting data over text-based protocols (like HTML, CSS, or JSON), it makes the data unreadable for standard applications. A Base64 to File decoder reverses this process, reconstructing the original file byte-by-byte so you can open, view, and use it normally.
Intelligent Format Autodetect
Don't know what kind of file your Base64 string represents? No problem. Our algorithm analyzes the header of the string and detects "magic numbers" (unique file signatures) to identify if it's a PNG, JPEG, PDF, ZIP, MP3, MP4, or any other common format.
Rich Media Preview
Unlike basic decoders, we let you see what's inside. You can preview images, watch decoded videos, listen to audio files, and even read PDF documents directly in your browser without downloading them first.
100% Privacy & Security
Your security is our priority. This tool runs entirely in your local browser environment. Your data is processed via JavaScript on your own machine and is never sent to our servers. This makes it safe for handling sensitive documents or private data.
data:image/... URIs.Does this tool support large Base64 strings?
Yes! Our converter is optimized to handle large strings. However, since processing happens in your browser, extremely large files (50MB+) may depend on your computer's available memory.
What if my Base64 string doesn't have a "data:" prefix?
Our tool works with both raw Base64 strings and full Data URIs. If the prefix is missing, we use binary signature detection to determine the correct file extension for you.
Is there a limit on how many files I can convert?
No. You can use this tool as many times as you want. There are no daily limits, subscriptions, or hidden fees.