Any file type works: PDFs, Word documents, Excel files, audio (MP3, WAV), video (MP4), archives (ZIP), executables, and any other binary or text file.

Common uses: embedding files in JSON APIs, storing files in databases as text, including attachments in email templates, and creating single-file HTML documents with embedded resources.

Base64 encoding increases size by approximately 33%. A 1MB file becomes about 1.33MB of Base64 text. This is the trade-off for text-safe encoding.

Limited by your browser's memory. Files up to 50-100MB usually work, but very large files may cause slowdowns. For huge files, consider server-side encoding.

Data URI includes the MIME type prefix (data:application/pdf;base64,...) which tells browsers how to handle the data. Raw Base64 is just the encoded string without the prefix.

Yes! Use our Base64 Decoder tool to convert Base64 back to the original file. It auto-detects the file type from the data.

No. Base64 is lossless encoding - the decoded file is identical to the original. It doesn't compress data, only converts binary to text format.

Yes. All encoding happens locally in your browser using JavaScript. Files are never uploaded to any server - your data stays completely private.

Currently, encode one file at a time. For batch conversion, process files individually - encoding is instant, so you can work through multiple files quickly.

For images: use the Data URI directly in HTML img src or CSS backgrounds. For APIs: send the raw Base64 string in JSON. For email: embed in HTML email templates.

File to Base64 Encoder - Convert Any File

Select File

File Info

Base64 Output

Usage Examples

Embed in HTML (PDF)

JSON API

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