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Base64 Encoder & Decoder

Change text to Base64 and back again.

Local Processing

Your input is processed in your browser.

Private by design

Your data is processed directly in your browser. It is not sent to Stay Local Tools servers for processing. Because the work happens on your device, nothing you type here leaves your browser unless you choose to copy or share it yourself.

Note: the website itself still loads normal web files, and may use analytics or ads later. The promise here is about the files and text you put into these tools.

How to Use

  1. Choose Encode or Decode.
  2. Enter your text.
  3. Copy the result.

What is Base64?

Base64 is a way to represent any data — text, images, or any file — using only 64 plain text characters: A–Z, a–z, 0–9, + and /. It is often used to safely include binary-like data inside text-only places, such as an email, a URL, or a JSON value.

Base64 is not encryption

Encoding is not the same as encrypting. Base64 has no password or key — anyone can decode it back to the original data instantly, with no secret required. It is meant to make data safe to transport as text, not to keep it private.

Why encoded text becomes longer

Base64 converts every 3 bytes of the original data into 4 text characters. That means encoded text is always roughly 33% longer than the original — a predictable, expected side effect of representing data this way, not a sign of a problem.

Questions and Answers

No. Base64 is not encryption or a secret code — it is a way to represent any data as plain text using only letters, numbers, + and /. Anyone can decode Base64 back to the original text with no password. Never use it to keep data secret.

Other Languages

Español

Codificar y decodificar Base64

Codifica texto a Base64 o decodifícalo de vuelta al texto original, con soporte completo de Unicode. El texto se procesa directamente en tu navegador y no se sube a los servidores de Stay Local Tools para el procesamiento.

Preguntas frecuentes

No. Base64 no es cifrado ni un código secreto, es solo una forma de representar cualquier dato como texto plano. Cualquiera puede decodificarlo sin contraseña.

Português (Brasil)

Codificar e decodificar Base64

Codifique texto em Base64 ou decodifique de volta ao texto original, com suporte completo a Unicode. O texto é processado diretamente no navegador e não é enviado aos servidores do Stay Local Tools para processamento.

Perguntas frequentes

Não. Base64 não é criptografia nem um código secreto, é apenas uma forma de representar qualquer dado como texto simples. Qualquer pessoa pode decodificá-lo sem senha.

한국어

Base64 인코딩 디코딩

텍스트를 Base64로 인코딩하거나 원래 텍스트로 디코딩할 수 있으며 유니코드도 완벽히 지원합니다. 텍스트는 브라우저에서 직접 처리되며 Stay Local Tools 서버에 업로드되지 않습니다.

자주 묻는 질문

아니요. Base64는 암호화나 비밀 코드가 아니라 문자, 숫자, +, /만 사용해 어떤 데이터든 일반 텍스트로 표현하는 방식입니다. 누구나 비밀번호 없이 되돌릴 수 있습니다.