What this encoder produces
The tool first converts your text to UTF-8 bytes, then represents those bytes using the standard Base64 alphabet. Output uses + and /, with = padding when needed. It produces a single line without adding a newline to your original text.
Text and exact encoded output
Hello → SGVsbG8=café → Y2Fmw6k=. The accented letter uses more than one UTF-8 byte.👋 → 8J+Riw==Hello with a final space → SGVsbG8g. Spaces and newlines are part of the input, so apparently similar text can have different output.Formula / Calculation Method
Encoded length = 4 × ceil(UTF-8 byte count ÷ 3). Padding fills the last group when necessary.
How to Use This Tool
- Enter the exact text, including any spaces or line breaks you want to preserve.
- Click Encode to Base64.
- Copy the result and check that your destination expects standard Base64.
Common Use Cases
Creating an encoding test fixture
Representing UTF-8 text in a Base64 field
Comparing payloads that differ in whitespace
Choose the format your destination expects
This tool generates standard Base64, not Base64url. JWT segments and some URL parameters use a different alphabet and may omit padding; check the receiving system before pasting standard output there. This text encoder does not upload or encode image and document files.
Base64 does not protect a secret
Anyone who has the output can decode it. Use it when a protocol requires a text representation of bytes, not to hide passwords or confidential messages. Encoding happens in this browser. Use the decoder to confirm the exact text comes back.