Base64 decoder
Turn Base64 back into readable text — or the original file.
Free No sign-up Runs in your browser
How it works
How to use the Base64 Decoder tool
- 1
Paste Base64
Standard, URL-safe or a data: URI.
- 2
Decode
Text is shown instantly; binary data is detected.
- 3
Copy or download
Save binary data as a file with the right extension.
Text or file?
If the decoded bytes are valid UTF-8, they’re shown as text. Otherwise FreeToolsDaily identifies the file type (PNG, PDF, ZIP…) from its content and offers it as a download.
Limitations
We’d rather be upfront about what this tool can’t do yet:
- Very large inputs (over ~20 MB) may be slow to paste.
FAQ
Frequently asked questions
Is my data sent anywhere?
No. All processing happens locally in your browser. Nothing you enter is uploaded, stored or logged.
Why does it say invalid Base64?
The input contains characters outside the Base64 alphabet or is truncated. Whitespace and line breaks are ignored automatically.
Keep going