What is this tool?
Base64 represents binary data using a limited set of text characters. It is commonly used in data URLs, email attachments, API payloads, authorization headers, and configuration files.
How to use it
Encode a value such as Hello world, decode a Base64 API value, or check whether a token-like string contains readable UTF-8 text.
Common uses
- Inspect Base64 values from API responses and configuration files.
- Create or debug data URLs used for small images and files.
- Convert Unicode text safely through UTF-8 before sharing or testing.
Common mistakes
- Base64 is encoding, not encryption; anyone can decode it.
- Missing padding or damaged characters can make a Base64 value invalid.
- Binary files may not decode into readable text.
Practical example: Base64 Unicode example
Encoding Hello 世界 produces a portable text value. Decoding that result restores the original Unicode text.
Privacy
This tool is designed to process your input locally in the browser. Avoid entering passwords, private keys, or other sensitive production data into any online tool.
Frequently asked questions
Is Base64 encryption?
No. Base64 is an encoding format and provides no secrecy.
Does this tool support Unicode?
Yes. Text is converted through UTF-8 before encoding and after decoding.
Why does Base64 decoding fail?
The input may contain invalid characters, missing padding, or binary data that is not readable text.