Base64 to Downloadable File Converter

Convert raw Base64 strings into downloadable binary files with custom filenames and MIME types.

How It Works & Processing Standards

Convert raw Base64 strings into downloadable binary files with custom filenames and MIME types.

Current Limits

  • Maximum input length: 100,000 characters

Base64 to Downloadable File Converter is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use Base64 to Downloadable File Converter

  1. 1
    Paste Base64 PayloadPaste the Base64 data string into the editor.
  2. 2
    Specify Filename & MIMEEnter the target filename (e.g. document.pdf) and MIME type.
  3. 3
    Download FileClick download to save the reconstructed binary file locally.

Common Use Cases

  • Downloading email attachments, saving Base64 images or PDFs from API responses, and file reconstruction
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