Encode text for transport
Convert text or binary-safe strings to Base64 when an API, configuration field or data URI expects encoded content.
About Base64 Encode / Decode
Base64 Encode / Decode converts text between UTF-8 and Base64 representations.
Common use cases
Decode received values
Inspect a Base64 string from logs, requests or configuration and turn it back into readable text.
Debug integrations
Check whether a value is valid Base64 while troubleshooting webhooks, tokens or application payloads.
How it works
1
The browser converts the input text into bytes using character encoding.
2
Encode mode maps those bytes into the Base64 alphabet; decode mode reverses that representation.
3
The result is displayed for copying without changing the original input.
Privacy & file handling
Encoding and decoding stay in the browser
The text you enter is transformed locally in the browser for this utility; Zavilo does not need to send it to a server for Base64 conversion.
Limitations and important notes
- Base64 is encoding, not encryption, and provides no secrecy.
- Decoded bytes may not form readable UTF-8 text if the source was binary data or used another character encoding.
- A malformed Base64 string may fail to decode or produce unexpected output.
Base64 vs URL encoding
| Feature | Purpose | Typical characters |
|---|---|---|
| Base64 | Represent arbitrary bytes as text | Letters, numbers, +, / and = padding |
| URL encoding | Escape characters that are unsafe in URLs | Percent-encoded byte values such as %20 |
How to use Base64 Encode / Decode
- 1
Paste text or Base64 data.
- 2
Choose Encode or Decode.
- 3
Copy the result.
Tips for better results
- The encoder supports Unicode text.
- Invalid Base64 data will show an error.
Frequently asked questions
Does it support Korean and other Unicode text?
Yes. Text is converted as UTF-8 before Base64 encoding.