What is Base64 used for?
Base64 is an encoding method used to carry binary data as text.
This tool is useful for text transport, API payload prep, and quick conversion checks without leaving the browser.
Base64 Codec
Encode text to Base64, test URL-safe output, and decode everything fully on the client side.
Base64 Codec
Encode text to Base64, try URL-safe output, and decode it entirely in the browser.
Base64 is encoding, not encryption.
Text is converted to UTF-8 bytes and encoded as Base64.
Results update instantly.
Output
Input chars
49
Output chars
76
Bytes
76
Valid
Type text or paste a Base64 string.
Share this calculation
The link keeps basic share tracking.
When do I need URL-safe mode?
URL-safe output replaces the plus and slash characters with safer alternatives for web addresses.
It is handy for tokens, links, and Base64 values that will appear inside query strings.
Is Base64 encryption?
No. Base64 is encoding only and provides no security by itself.
Use proper encryption and access control when the data must remain secret.
Encoding is not encryption
Base64 is designed to carry binary data through text channels, not to hide the content from readers.
Anyone can decode a Base64 string, so secret data requires encryption, access control, and suitable key handling.
Why URL-safe Base64 looks different
Standard Base64 output can include characters that have special meaning inside URLs.
The URL-safe variant swaps those characters so links, tokens, and query string values are easier to transport.
Use in APIs and file flows
Base64 can be practical when a JSON payload needs to carry a small binary fragment or signature-like text.
For larger files, the encoded output grows, so performance and storage impact should be evaluated separately.
A safer debugging workflow
If decoding fails, first check whitespace, line breaks, and padding characters before changing the source value.
Real production tokens or personal data should be masked before being pasted into tickets, chats, or examples.