// Encoding Tool

BASE64 ENCODER / DECODER

Encode text or files to Base64, decode Base64 back to text or download as a file. Supports UTF-8, URL-safe alphabet, and binary files — entirely in your browser.

URL-safe (RFC 4648 §5)

Live mode

Plain Text → Base64

↕

Base64 → Plain Text

About Base64

Base64 encodes binary data using 64 printable ASCII characters (A–Z, a–z, 0–9, +, /). It is widely used in email attachments (MIME), data URIs, JWTs, and API payloads.

URL-safe variant replaces + with - and / with _, eliminating characters that have special meaning in URLs.
Encoding overhead is approximately 33% — every 3 bytes become 4 characters.
All processing happens in your browser. No data is uploaded or stored.