Base64 Decoder
Decode Base64 strings back to readable text. Supports UTF-8 and detects invalid Base64 input with helpful errors.
About this tool
What is Base64 Decoder?
The Base64 Decoder reverses Base64-encoded text back to its original string form. It handles standard Base64, URL-safe Base64, and padded or unpadded strings. All decoding is performed client-side for privacy.
How to use
Get your result in a few steps
- 1
Paste your Base64-encoded string into the input.
- 2
Click 'Decode Base64' to reveal the original text.
- 3
Copy the decoded output to your clipboard.
Frequently asked questions
Questions about Base64 Decoder
Why is my Base64 not decoding?
Ensure the string uses valid Base64 characters (A-Z, a-z, 0-9, +, /, =). Remove any whitespace or line breaks if present.
Can I decode binary data?
This tool decodes to text. For binary data such as images, use a dedicated binary decoder or save the decoded bytes directly.
Does this support URL-safe Base64?
Yes. The decoder automatically handles both standard Base64 (+, /) and URL-safe Base64 (-, _) variants.
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