Encode and decode Base64 strings.
Secure ProcessingFiles Deleted After ProcessingFast & Reliable
How It Works
1
Upload / Input
Select your files or paste your content to get started.
2
Process
Our engine processes your data securely -- most operations happen right in your browser.
3
Download / Result
Get your results instantly. Download files or copy output in one click.
Features
Encode text to Base64
Decode Base64 to text
Full Unicode support
File-to-Base64 conversion
Auto-convert as you type
Character count for input and output
One-click copy to clipboard
FAQ
Yes. The tool uses TextEncoder and TextDecoder to handle the full Unicode range, including emoji and multi-byte characters.
Yes. Switch to file mode, upload any file, and get its Base64 data-URL representation instantly.
There is no hard limit, but very large inputs may slow down your browser since everything runs client-side.
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About Base64 Encoder
Encode text to Base64 or decode Base64 back to text. Handles Unicode characters correctly using TextEncoder/TextDecoder. Also supports file-to-Base64 conversion via FileReader.