Base64 Decoder — Base64 to Text
Decode any Base64 encoded string back to readable text instantly. Handles standard Base64 and URL-safe Base64 variants.
Most current tools process data directly in your browser. If a tool requires external processing, it will say so clearly.
How to Decode Base64
- 1Paste the Base64 encoded string into the input
- 2The decoded text appears automatically
- 3If the input is invalid, an error message explains the issue
- 4Copy the decoded text with one click
Key Benefits
- Decodes standard and URL-safe Base64
- Clear error messages for invalid input
- Handles Unicode output correctly
- Instant decoding with no delay
Frequently Asked Questions
What characters are valid in Base64?
Standard Base64 uses A-Z, a-z, 0-9, +, and /. URL-safe Base64 replaces + with - and / with _. Both variants use = for padding.
Why does my Base64 show as invalid?
Common causes: the string has been truncated, contains spaces or line breaks in the wrong places, or was not actually Base64 encoded.
Can I decode binary files with this tool?
This tool decodes Base64 to text. For Base64-encoded binary files (images, PDFs), a dedicated file decoder would be needed.