Decodificador Base64
Decodifica Base64 a texto y archivos al instante
Input
Output
Base64 Decoding Examples
Base64 strings are decoded back to their original form. Example:
Decoding text
Base64 input:
Decoded output:
Paste the Base64 into the editor above. Use Sample to load more.
What Is Base64 Decoding?
Base64 decoding reverses the encoding process. The RFC 4648 specification defines the alphabet and padding rules.
This tool uses atob(). For encoding, use the Base64 Encoder.
How to Use This Tool
Paste or Upload
Paste your Base64 string or click Upload. Use Sample for example data.
Check the Output
The right panel shows the decoded result. For images, use Base64 to Image.
Copy or Download
Use Copy or Download. For encoding, use the Base64 Encoder.
How Base64 Decoding Works
Base64 uses 64 characters. The atob() function performs the conversion.
For image preview, use Base64 to Image. For encoding images, use Image to Base64.
Where Base64 Decoding Helps
API responses often return Base64-encoded data. For images, use Base64 to Image.
To encode data, use the Base64 Encoder.
Frequently Asked Questions
Is my data private?
Yes. Decoding runs entirely in your browser.
What if I get "Invalid Base64"?
Base64 only allows A–Z, a–z, 0–9, +, /, and =. Data URIs are supported.
Can I decode images?
Yes. For preview, use Base64 to Image.
What's the size limit?
The tool has a 10 MB limit for file uploads.
Does it support Base64url?
Yes. The tool converts - and _ automatically. See RFC 4648 Section 5.
Herramientas relacionadas
Ver RFC 4648.