Base64 Decoder
Decode Base64 to plain text
About this Tool
Base64 Decoder is a free, privacy-first tool built for developers. Decode Base64 to plain text
â100% Client-Side: All processing happens in your browser. No data is ever sent to our servers.
âFast & Efficient: Instant results with no server roundtrips or delays.
âFree Forever: No sign-up, no limits, no hidden fees. Use as much as you need.
âFile Support: Upload files directly or paste content. Your choice.
âHistory: Your recent conversions are saved locally for quick access.
Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to our servers. While we strive for accuracy, please verify critical data before use in production environments. FormatKit is not responsible for any data loss, corruption, or issues resulting from tool usage.
How to Use Base64 Decoder
Upload a Base64 encoded file or paste your Base64 text into the input field and it will be automatically decoded to plain text in real-time. All processing happens in your browser - no data is sent to our servers.
Features
- Real-time decoding as you type
- UTF-8 support for international characters
- Error handling for invalid Base64 input
- Copy decoded text with one click
- Download as text file
- Character count display for both input and output
Common Use Cases
- Debugging: Decode Base64 strings from API responses or logs
- Data URIs: Extract data from Base64 data URIs
- Email attachments: Decode Base64 encoded file content
- Configuration files: Decode Base64 encoded configuration values
FAQ
Q: What if my Base64 string has errors?
The decoder will show a clear error message if the input is not valid Base64.
Q: Can I decode binary files?
Text files work well. For binary files (images, PDFs), file download support is coming in a future update.
Q: Does it support Unicode characters?
Yes! The decoder properly handles UTF-8, so international characters and emojis will be decoded correctly.