Developer tools
Base64 Decoder
Decode Base64 strings back into readable text. No signup required.
- Free to use · no account required
- Processes input in your browser
- Review and copy your results
Enter your details
Step by step
How to use Base64 Decoder
Prepare your input
Paste a standard Base64-encoded text string.
Run the tool
Select Calculate / Convert to decode it into readable text.
Check and use the result
Review the result or correct invalid input before trying again.
How this tool works
Enter your input above, select Calculate / Convert, and copy the result if needed. This tool runs in your browser. No input is intentionally uploaded to ToolTama by the tool.
Good to know
Frequently asked questions
Can this decode every binary file?
This text tool is intended for encoded text. Arbitrary binary data may not form readable UTF-8 text, and URL-safe Base64 can use a different alphabet.
Is Base64 Decoder free?
Yes. This public tool does not require an account, payment or subscription.
Where is my input processed?
The tool-specific processing runs in your browser. Website delivery still involves hosting requests; see the privacy policy for details. Read the privacy policy.
Why do I get an error when decoding?
The input contains characters outside the Base64 alphabet, or its length is wrong. URL-safe Base64 uses – and _ instead of + and /; swap them back before decoding.
Why use this tool
Decode Base64 strings back to readable text
Read Base64 values from API responses, email sources, config files and tokens. Output is decoded as UTF-8, so Arabic and other scripts display correctly.
Your privacy: Your data is decoded in your browser and never sent to ToolTama.
Related: Base64 encode, URL decode, JSON formatter.