Internet Utilities
Base64 Encoder and Decoder
Encode text to Base64 or decode Base64 back to plain text.
The input is not valid Base64 text.
Introduction
The Base64 Encoder and Decoder converts readable text into Base64 and decodes Base64 back to text. It is useful for development, testing, examples, configuration snippets, and understanding encoded values found in web systems.
About this base64 tool tool
Base64 is a representation format, not a security feature. It allows data to travel through systems that expect plain text characters, which is why it appears in JSON payloads, email formats, data URLs, and some API workflows. Anyone with the string can decode it.
How this tool works
Choose encode to convert the input text into a Base64 string, or decode to convert a Base64 string back into text. The browser handles common Unicode text by converting it through bytes before encoding and decoding, and invalid Base64 input is reported as an error.
- Paste the text or Base64 value.
- Choose encode or decode.
- Copy the output after checking the result.
When to use this tool
Use it for harmless test data, documentation examples, debugging API fields, or checking whether an encoded value contains the text you expect. Do not paste passwords, tokens, private keys, or production secrets into any online conversion tool.
Good to know
- Base64 is encoding, not encryption. Do not treat encoded text as secret.
- The tool is intended for text values, not large binary files.
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