Base64 디코더 인코더 온라인 — 무료 변환기
무료 온라인 Base64 인코더 및 디코더. 텍스트나 바이너리를 Base64로 인코딩하거나 원래 형태로 디코딩 — 전부 브라우저에서.
UTF-8 텍스트를 붙여넣고 인코딩/디코딩을 전환하세요. URL, JSON, 이메일 헤더에 토큰·이미지·자격 증명을 포함할 때 유용합니다.
일반적인 사용 사례
- 1Embed credentials, tokens or small images directly into URLs, JSON or email headers safely.
- 2Decode Authorization headers (Basic auth, JWTs) to inspect what your client is sending.
- 3Convert binary attachments to text for systems that only accept ASCII.
자주 묻는 질문
Is my input sent to your server?+
No. Base64 encoding and decoding both run in your browser via the standard btoa/atob APIs. Nothing leaves the page.
Why is my decoded output garbled?+
Either the input is not valid Base64 (check for missing padding or stray characters), or the original data was binary, not text. A binary viewer is the right tool for non-text payloads.
Does it handle UTF-8 / emoji?+
Yes. We pipe the input through encodeURIComponent / unescape before btoa so emoji and non-ASCII characters round-trip correctly.