File to Base64
Free Local ProcessingFree online file to Base64 encoder that encodes any file into a Base64 string or Data URL format. Suitable for embedding binary data in text, config file references, and more. All processing happens in your browser, files never uploaded, privacy-safe.
Drag files here, or
max each 10.0 MB
Options
How to Use
- 1 Select a file to convert (max 10MB)
- 2 Check "Output Data URL format" to get a result with a MIME prefix
- 3 Click "Convert to Base64" button
- 4 Copy the generated Base64 string or Data URL
FAQ
Q: Are files uploaded to the server?
No. All processing happens in your browser. Files never leave your device.
Q: What is the difference between Data URL and plain Base64?
Data URL includes a MIME type prefix (e.g. "data:image/png;base64,") and can be referenced directly in HTML/CSS. Plain Base64 contains only the encoded string.
Q: Why the 10MB limit?
Base64 encoding increases size by about 1/3. Overly large files cause browser memory pressure and clipboard lag, so the limit is set to 10MB.
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- File Base64
Encode small files as Base64 for inlining and transport.
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