Outils de Développement
Décoder le texte Base64 au format original
Décodeur Base64
Décoder le texte Base64 au format original
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Décodage Base64
Texte Base64 à Décoder
Texte Décodé
Learn more about Base64 Decoder
About Base64 Decoder
Decode any Base64 encoded string back to its original text or binary representation. Supports both standard Base64 and URL-safe Base64 variants, and handles padding correctly.
Key features
- Decodes standard and URL-safe Base64 strings
- Shows decoded output as UTF-8 text
- Handles Base64 with or without padding
- Copy decoded result in one click
- Instant — no page reload or server call
How to use Base64 Decoder
- 1Paste your Base64 encoded string into the input field
- 2The decoded text appears instantly
- 3If the input is URL-safe Base64, toggle the URL-safe option
- 4Copy the decoded output to your clipboard
Frequently asked questions
- Why does my Base64 decoded output look like gibberish?
- The decoded data might be binary rather than text. Try the Base64 to Image tool if the source data was an image, or ensure the Base64 was originally encoded from text.
- What does "invalid Base64" mean?
- Base64 uses only A-Z, a-z, 0-9, +, /, and = for padding. Any other character makes the string invalid. URL-safe Base64 also allows - and _.
- Does the decoder handle multiline Base64 strings?
- Yes. Base64 is sometimes split into 76-character lines. The tool handles both single-line and multiline Base64 correctly.
- Can I decode an image from Base64?
- For Base64-encoded images, use the "Base64 to Image" tool which renders the image directly from the data URI.