Base64 to File Converter - PDF, Images & More
Convert Base64 encoded data to downloadable files. Supports PDF, PNG, JPG, and other file formats with instant preview.
Base64 Input
File Preview
No file to preview
Paste Base64 data or load a sample
About Base64 to File Conversion
How it Works
Base64 is a binary-to-text encoding that represents binary data in ASCII format. This tool decodes Base64 strings back into their original binary form, allowing you to download and view the original file.
Supported File Types
- PDF documents (application/pdf)
- Images (PNG, JPEG, GIF, WebP)
- Text files and documents
- Any binary file format
Frequently Asked Questions
How do I convert Base64 to PDF?
Simply paste your Base64-encoded PDF data into the input field. The tool will automatically detect it's a PDF and show you a preview. Click "Download File" to save the PDF to your computer.
What file types are supported?
This tool supports all file types. It automatically detects common formats like PDF, PNG, JPEG, GIF, WebP, and more using file signatures (magic bytes). Unknown formats are saved as binary files.
Is my data secure?
Yes, absolutely. All conversion happens locally in your browser using JavaScript. Your Base64 data is never sent to any server, ensuring complete privacy and security.
Can I use data URLs?
Yes! You can paste data URLs with the format "data:application/pdf;base64,..." and the tool will automatically extract the MIME type and Base64 data.
Advanced Base64 to File Decoding
Base64-encoded files are commonly embedded in JSON API responses, email attachments (MIME format), HTML data URIs, and database records. Instead of relying on server-side tools to decode these files, this Base64 to File Converter lets you decode them directly in your browser with instant file preview and download. The tool automatically detects file types by analyzing magic bytes (file signatures), so whether you're decoding a PDF document, PNG image, ZIP archive, or binary data, the converter recognizes the format and handles it appropriately. This approach is faster than uploading files to online services and is completely private—all processing happens locally in your browser without sending data to any server.
Common scenarios where you'll need this tool include debugging API responses that contain Base64-encoded files, extracting images embedded in HTML emails, recovering attachments from database exports, and converting data URIs back to downloadable files. The instant preview feature for PDFs and images lets you verify the decoded file is correct before downloading, saving time and preventing corrupted files from being saved to disk.
Common Use Cases
- API Response Decoding: Extract Base64-encoded files from REST API responses, such as documents returned by content management systems or file storage APIs.
- Email Attachment Recovery: Decode MIME-encoded email attachments from email data or email export formats (EML, MSG) to restore original files.
- Data URI Conversion: Convert HTML data URIs (data:image/png;base64,...) back to downloadable image files.
- Base64 Certificate Extraction: Decode Base64-encoded SSL/TLS certificates (PEM format) from configuration files or API responses.
- Database Field Extraction: Decode Base64 data stored in database BLOB or TEXT fields without writing SQL export scripts.
How to Use This Tool
- Paste Base64 Data: Paste your Base64-encoded data into the input panel. Supports raw Base64 strings, full data URIs (data:application/pdf;base64,...), or JSON fields containing Base64 data.
- Format Detection: The tool automatically detects MIME type using file signatures and displays a preview for PDFs and images.
- View Preview: For PDFs, see an embedded preview. For images, see a thumbnail. For other files, see the detected type and size information.
- Download File: Click the Download button to save the decoded file to your computer with the correct filename and extension.
- Check File Info: View the original Base64 size versus decoded file size, detected MIME type, and extraction source (if extracted from data URI or JSON).
Features
Document Formats
PDF documents with instant preview, Microsoft Office files (DOCX, XLSX, PPTX), text documents (TXT), and rich text formats (RTF).
Image Formats
PNG, JPEG, GIF, WebP, SVG, BMP, TIFF with instant thumbnail preview and MIME type detection.
Archive Formats
ZIP archives, RAR, TAR, GZIP for compressed data distribution and backup files.
Binary & Text
Any binary file format, CSS/JavaScript/JSON/XML text files, and executables with automatic MIME type detection.
Frequently Asked Questions
How do I convert Base64 to PDF?
Simply paste your Base64-encoded PDF data into the input field. The tool automatically detects it's a PDF using file signature analysis and shows an embedded preview. Click "Download File" to save the PDF to your computer with the original filename.
What file types are supported?
This tool supports all file types. It uses file signature (magic byte) detection to identify PDFs, images, archives, documents, and more. Unknown formats are saved as binary files with their detected MIME type as the file extension.
Is my data secure?
Yes, absolutely. All conversion happens locally in your browser using JavaScript. Your Base64 data is never sent to any server, ensuring complete privacy and security. Even for large files, processing stays on your device.
Can I use data URLs?
Yes! You can paste data URLs with the format "data:application/pdf;base64,..." and the tool automatically extracts the MIME type and Base64 data, then decodes it correctly.