Free Base64 Decoder
Decode any Base64 string back to its original file. Supports data URIs with auto MIME detection and image preview.
Features
Decode any Base64 string
Auto-detect file type
Image preview
Free, no sign-up
How to Use
- Open the Base64 Converter
- Switch to decode mode
- Paste your Base64 string
- Preview and download the file
FAQ
What is Base64 decoding?
It converts a Base64-encoded text string back into the original binary file data.
How is the file type detected?
If the input is a data URI, the MIME type is extracted. Otherwise, the file is saved as a generic binary file.
Can I decode Base64 images?
Yes, decoded images are previewed before download.
Is there a size limit?
No strict limit, but very large Base64 strings may be slow to decode in the browser.