Como usar: Base64 Decode
- Paste the Base64 text in the input — it is decoded as you type.
- URL-safe Base64 (with - and _) and missing = padding are handled automatically.
- Copy the decoded text, or switch to Encode to go the other way.
What Base64 decoding does
Base64 represents binary data with 64 printable characters (A–Z, a–z, 0–9, + and /), four characters for every three bytes. Decoding reverses that and turns the bytes back into text using UTF-8, so accents and emoji come out correctly: SGVsbG8sIHdvcmxkIQ== decodes to “Hello, world!”.
URL-safe Base64 and padding
JWTs, URLs and many APIs use Base64URL, which replaces + and / with - and _ and usually drops the trailing = padding. The decoder accepts both variants and adds the padding back when it is missing.
When the result looks like gibberish
If the decoded output is unreadable, the data is probably not text — an image, a PDF, compressed or encrypted data. For images use Image to Base64 (it decodes data URLs back to pictures), and for JWTs use the JWT Decoder, which decodes all three parts.
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Ferramentas que combinam com: Base64 Decode
- Codificação/Decodificação Base64 — Converte texto para Base64 e vice-versa, com suporte total a UTF-8 (acentos, emojis); alterna para Base64 seguro para URLs; ou arrasta um arquivo para obter sua string Base64 ou URI de dados.
- Decodificador JWT — Cole um JSON Web Token para analisar seu cabeçalho e sua carga, verificar quando ele expira e conferir sua assinatura.
- URL Decode — Paste a URL or query string full of %20 and %3D to make it readable again — with each query parameter decoded and listed separately.
- Imagem para Base64 — Transforme um arquivo PNG, JPEG, SVG, WebP ou GIF em um URI de dados Base64 com CSS e HTML prontos para copiar — ou cole uma sequência Base64 para visualizar e baixar a imagem.