Base64 Encoder
Convert pasted text to Base64 or Base64URL directly in your browser. Useful for checking payload snippets, config values, and API examples.
Base64 Encoder
Convert pasted text to Base64 or Base64URL directly in your browser. Useful for checking payload snippets, config values, and API examples.
About Base64 encoding
Text becomes a portable ASCII string
The encoder reads the text you paste, encodes it as UTF-8 bytes, and returns the Base64 representation. It is useful when a config field, API sample, or test fixture expects a Base64 string instead of plain text.
Base64URL mode for URL contexts
When URL-safe mode is enabled, padding is removed and the plus and slash characters are replaced with hyphen and underscore. The page still works on pasted text only, so it does not read files or create a complete data URL prefix for you.
FAQ
Common questions and answers about this topic.
What is Base64?
Base64 encoding represents byte data using 64 ASCII characters. This page applies that encoding to pasted UTF-8 text and returns the resulting Base64 string.
When should I use Base64?
Use this tool when you need to place a text value in a Base64 field, compare expected encoded output, or prepare a small payload snippet for documentation or tests.
Is my data sent to any server?
No, Base64 encoding happens entirely in your browser. Your data is encoded locally with JavaScript and never leaves your device.