🔐 Base64 Encoder/Decoder offline
Free offline Base64 encoder/decoder. Encode and decode Base64 strings with UTF-8 support instantly in your browser.
Plain Text
Base64 Output
How to Use
Choose Encode or Decode, paste your text or Base64 string, and click Convert. I use this to quickly inspect tokens, embed data in JSON, or decode small payloads for debugging.
Example
Input: hello-world Encoded: aGVsbG8td29ybGQ=
- Select the mode (Encode or Decode).
- Paste your input text or Base64 string.
- Click Convert and review the output.
- Copy the result to use elsewhere.
Use Cases
Where Base64 is most useful:
- Embedding assets in HTML or CSS via data URIs.
- Transporting binary data inside JSON payloads.
- Email attachments with MIME encoding.
- Basic auth headers for test requests.
Tips & Best Practices
Base64 is not encryption
Anyone can decode it, so never rely on it for security.
Use UTF-8 safe encoding
This tool handles UTF-8 so emojis and special characters survive round-trips.
Watch size growth
Encoded data grows by about 33%, so keep payloads small.
Use for transport, not storage
Store raw binaries where possible and encode only when required.
Comparison with online tools
Online Base64 tools can expose credentials or files. TurboUtil keeps everything on-device, which is safer for sensitive data.
Online encoders
- Upload data to external servers
- Potential logging or retention
- Require internet access
- Risk for sensitive payloads
TurboUtil Advantages
- All processing stays local
- No uploads or tracking
- Works offline after load
- Full UTF-8 support
FAQ
Why does decoding fail?
The input may be incomplete or include invalid characters. Try trimming whitespace.
Is Base64 safe for secrets?
No. It is reversible. Use encryption for sensitive data.
Does it support emojis?
Yes. UTF-8 is supported for both encode and decode operations.
Is my data uploaded?
No. Everything runs locally.
About Base64 Encoder/Decoder
Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format. It's commonly used to encode data that needs to be stored or transferred over media designed to handle text, such as embedding images in HTML/CSS or sending data in JSON.
Features
- ✓Encode any text to Base64 format
- ✓Decode Base64 strings back to original text
- ✓Full UTF-8 character support (including emojis)
- ✓Error handling for invalid Base64 strings
- ✓One-click copy to clipboard
- ✓Works offline in your browser
How to Use
- 1.Select "Encode" or "Decode" mode
- 2.Enter your text or Base64 string
- 3.Click the convert button
- 4.Copy the result to use in your application