Encode or decode Base64 text
Base64 is an encoding format, not encryption. In CTFs it commonly appears in descriptions, cookies, JSON, and file contents.
LOCAL CTF TOOL
Base64 Encoder / Decoder
Encode and decode Base64 locally in your browser for quick checks during CTF practice.
INPUT ·
LOCAL ONLY
OUTPUT
Privacy first
Input is processed in your current browser. The current version does not upload your text to a server.
Common questions
How does this tool work?
The transformation runs in your browser.