How to Use text base64 — Encode & Decode

A short, clear 3-step guide to encode or decode text quickly and safely.

Enter the plain text you want to encode, or paste Base64 text to decode, into the textarea on the main page.

The page automatically encodes or decodes your text depending on the selected mode. No extra buttons required.

Use the Copy or Download controls to save the Base64 output or decoded text as needed.

Base64 is an encoding, not encryption — it is reversible. Don’t use it to protect secrets.
For very large text, prefer downloading as a file (Base64 increases size by ~33%).
The tool runs entirely in your browser — nothing is uploaded unless you explicitly share it.