About the Base64 Encoder
Encode Unicode text to Base64, decode Base64 back to UTF-8 text, switch to URL-safe output for tokens and links, or load a local file and convert its bytes into a Base64 string without uploading the file.
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Base64 Encoder
Encode and decode text or files with standard and URL-safe modes.
Text and file encoding run locally in your browser.
Text input
Ready40 bytes
Q29kZVNwaGVyZSB0b29scyBydW4gbG9jYWxseS4=How the result is produced
Text is encoded from UTF-8 bytes and files are read locally before being converted to Base64. URL-safe mode swaps the standard alphabet and padding behavior for contexts that carry encoded data in URLs or tokens.
Example: Encoding the text `hello` produces `aGVsbG8=`, while decoding that value restores the original UTF-8 text.
Limitations and review notes
Base64 is an encoding, not encryption or authentication. Encoded values can still expose sensitive information, and large files may be limited by browser memory and the size of the output field.
How to use it
- 1. Choose Encode for plain text or Decode for an existing Base64 string.
- 2. Toggle URL-safe mode when working with URL parameters, JWT-like payloads, or tokens.
- 3. Use File to Base64 to read local file bytes into the input field.
- 4. Copy the result or download it as a text file.
FAQ
Does Base64 encoding upload my text or files?
No. Text encoding, decoding, and file-to-Base64 conversion run locally in your browser.
What is URL-safe Base64?
URL-safe Base64 replaces + and / with - and _ and removes padding so encoded values fit more safely in URLs and tokens.
Can I decode arbitrary binary files as text?
The text decoder only displays valid UTF-8. Binary file output should be treated as encoded data rather than readable text.
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