Base64 to File Converter

Decode a Base64 string and download it as a file. Supports all file types with automatic MIME type detection and custom filenames.

Paste a Base64 string (with or without a data: prefix) and download it as a file. The MIME type is auto-detected from data URIs.

Frequently Asked Questions

Got questions? We've got answers. Search below or browse through our most commonly asked questions.

Paste your Base64 string into the input area, optionally select the correct MIME type and filename, then click 'Decode & Download'. The tool will convert the Base64 string back to its original binary format and download it.
Yes. If your Base64 string includes a data URI prefix (like 'data:image/png;base64,...'), the tool will automatically detect the MIME type from the prefix.
Any file type that was encoded to Base64 can be decoded back. Common examples include images (PNG, JPG, GIF), PDFs, ZIP archives, and documents. The MIME type dropdown helps ensure the correct file extension is used.
This usually happens when the MIME type doesn't match the actual file content. Try selecting the correct MIME type from the dropdown, or use 'application/octet-stream' for unknown types and rename the file extension manually.