Base64 to File Converter: Decode and Download Files
The Base64 to File converter turns a Base64 string or complete data: URI into a downloadable file. It removes whitespace and the data: prefix automatically, accepts both standard and URL-safe Base64 alphabets, then decodes the bytes in your browser. The tool inspects the bytes with the same magic-byte engine as the File Type Detector and offers the download with the detected file extension.
The Base64 to File converter decodes Base64 text into a downloadable file. Use it to decode Base64 online when you have an encoded file value or a complete data: URI. Instead of requiring a local utility, the tool processes the input in your browser and prepares the decoded bytes for download.
The conversion handles common input variations automatically: whitespace is stripped, the data: prefix is removed, and both standard and URL-safe Base64 alphabets are accepted. After decoding, the bytes are inspected with the same magic-byte engine as the File Type Detector. The tool then offers the result as a download with the detected file extension; there are no configurable options described for this conversion.
Base64 represents bytes as text, while the decoded output is a file made from those bytes. Converting back to a file is useful when encoded content appears in an API response, a data URI, or another text-based source. The detected extension also helps make the downloaded file easier to recognize and use.
The conversion runs entirely in your browser: input is processed on your device and is not uploaded, stored, or sent to a server. The tool is free, and after the page has loaded it works offline because it has no server dependency. Developers and DevOps engineers can use this Base64 decoder to file workflow wherever they need to turn encoded content into a downloadable file without installing anything locally.
Step 1: Paste or enter a Base64 string, or provide a complete data: URI. You can also drop your content into the tool.
Step 2: Let the tool clean up the input. It strips whitespace and the data: prefix automatically, and accepts standard and URL-safe Base64 alphabets.
Step 3: The tool decodes the Base64 content into bytes in your browser, then inspects them with the same magic-byte engine as the File Type Detector.
Step 4: Download the resulting file with the detected file extension.
Use case: Decode a Base64 file value from an API response without installing a local utility. Paste the encoded content and download the decoded file.
Use case: Recover a file from a complete data: URI. The tool removes the URI prefix automatically before decoding.
Use case: Work with encoded files on a machine where you cannot install command-line tools. The conversion runs in your browser.
Use case: Handle internal or sensitive encoded content without pasting it into a third-party service. The input stays on your device.
Use case: Convert Base64 that contains whitespace or uses the URL-safe alphabet. The tool accepts both standard and URL-safe Base64 and strips whitespace automatically.
Use case: Identify the file extension for a decoded file. The tool inspects the bytes with the File Type Detector's magic-byte engine and offers a download with the detected extension.