Is the base64 to file converter private?
Yes. Use the downloaded extension appropriate for your original data when the Base64 value has no Data URL MIME type. All processing happens locally in your browser — nothing is uploaded to our servers.
Base64 to File Converter
Decode Base64 binary data and download it as a file with no server-side processing.
Runs locally in your browser
How to use it
- Paste your input or choose a file from this device.
- Run the conversion and review the detected type or preview.
- Copy the result or download it for your project.
Built for Base64 files
Use the downloaded extension appropriate for your original data when the Base64 value has no Data URL MIME type.
No registration, watermark, queue, or server upload is required.
Use Base64 wisely
Base64 is ideal for text-only APIs, small embedded assets, test fixtures, and portable documents. It increases payload size, so external files are usually better for large public assets.
Frequently asked questions
How do I know which file extension to use?
If your input is a Data URL, the MIME type sets the extension. For plain Base64, choose the extension matching the original file type.
Can I decode Base64URL file payloads?
Yes. URL-safe alphabet and padding are normalized before the binary file is reconstructed.
When should I use Base64 for Base64 files?
Use it when a text-only channel or API must carry binary data, or when a small Base64 files asset needs to live inside a self-contained document. Prefer separate files for large, cacheable public assets.