Base64 Encoder/Decoder
Encode and decode Base64 strings with full UTF-8 support.
About Base64
- What it does — Encodes binary data as ASCII text using 64 characters (A-Z, a-z, 0-9, +, /).
- Common uses — Data URIs in CSS/HTML, email attachments (MIME), API tokens, basic obfuscation.
- Padding — Base64 strings end with '=' to make length a multiple of 4.
- URL-safe — Replace + with - and / with _ for use in URLs.
All encoding/decoding happens locally in your browser. No data is transmitted.
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