Base64 Encoder & Decoder

Paste text on the left, then Encode or Decode. Full UTF-8 support — everything runs in your browser.

Input 0 chars

Output 0 chars

Status Waiting for input Mode — Input — Output —

What this tool does

Base64 represents binary or text data using 64 printable ASCII characters, so it can travel safely through systems that only expect text — email bodies, JSON fields, data URLs, HTTP headers. Encode → turns your text into Base64; Decode ← turns Base64 back into the original text.

When to use it

Reading a Base64 value from a JWT, config file, or API response
Embedding a small snippet of text or SVG as a data: URL
Checking what an encoded token or header actually contains

Unicode & privacy

Encoding and decoding are UTF-8 aware, so accents, emoji, and non-Latin scripts round-trip correctly. The tool runs entirely client-side — nothing you paste is uploaded, logged, or stored.