Local developer utility

Base64 Encoder and Decoder

Encode and decode UTF-8 text locally in your browser. Your input stays in your browser while you work.

Base64 Encoder / Decoder🔒 Processed locally

How to use Base64 Encoder / Decoder

Complete the labeled fields above, choose an action, and inspect the result before copying or downloading it.

Processing runs locally in this browser. No input is uploaded or sent to a conversion service.

HTML Entity Encoder — Escape text for inclusion in HTML text content.
HTML Entity Decoder — Decode HTML entities into plain text without executing markup.
HMAC Generator — Generate HMAC-SHA-256, SHA-384, or SHA-512 using a local secret.
OAuth PKCE Generator — Generate a cryptographically random verifier and S256 code challenge.