Base64 to Downloadable File Converter
Local ProcessingConvert 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.
Tool processing runs in your browser. If you create a calculator or conversion share link, its values are included in the URL. See the privacy policy for account, analytics and advertising data.
Current Limits
- Maximum input length: 100,000 characters
Paste a Base64 string from an API response or log and restore the original image, PDF or text file for download.
Large Base64 strings use a lot of browser memory. The file is created on this device only, never sent to a server.
How to Use Base64 to Downloadable File Converter
- 1Paste Base64Only the Base64 part, without a data: prefix.
- 2Name and typeA file name (for example report.pdf) and MIME type (application/pdf).
- 3DownloadDownload and open the restored file.
Examples
Common Use Cases
- Saving a PDF or image an API returned as Base64
- Extracting attachment data embedded in email or logs
- Checking what file a Base64 payload is while debugging
Frequently Asked Questions (FAQ)
It starts with data:image/png;base64,
The Data URI Decoder reads the MIME type automatically. For this tool, paste only the Base64 after the comma.
What if I do not know the MIME type?
Match the extension (image/png for PNG, application/pdf for PDF), or use application/octet-stream.