Base64 to File Online
Base64转文件Data URL文件下载解码
Paste a base64 or Data URL string to auto-detect file type and size, set a custom name and download the restored file. Ideal for file forensics and API payload analysis, fully local.
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How to Use
- Pick a local file or image (never uploaded)
- It is converted to a Base64 string or Data URL automatically
- Copy the result into code or download it
- All encoding/decoding runs locally; sensitive content never leaves your device
Related Tools
FAQ
Which input formats are supported?
Standard Data URLs (data:type;base64,xxx) and raw base64 strings; raw input is sniffed by magic bytes for common types.
How is the file type detected?
The MIME from the Data URL takes priority; for raw base64, magic numbers of PNG, JPEG, GIF, PDF, ZIP and more are recognized automatically.
Will my data be uploaded?
No, parsing and downloading run entirely in your browser.