Cómo 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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Herramientas que combinan con: Base64 Decode
- Codificación y descodificación Base64 — Convierte texto a Base64 y viceversa con compatibilidad total con UTF-8 (acentos, emojis), cambia a Base64 compatible con URL o arrastra un archivo para obtener su cadena Base64 o su URI de datos.
- Decodificador JWT — Pega un token web JSON para examinar su encabezado y su carga útil, comprobar cuándo caduca y verificar su firma.
- 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.
- Imagen a Base64 — Convierte un archivo PNG, JPEG, SVG, WebP o GIF en un URI de datos Base64 con código CSS y HTML listo para copiar, o pega una cadena Base64 para ver una vista previa y descargar la imagen.