Developer Utility
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to readable text. Everything runs locally in your browser.
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Fast
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How to Use Base64 Encode & Decode
1
Choose Mode
Select Encode or Decode depending on your task.
2
Enter Input
Paste text or upload a .txt file.
3
Convert Instantly
Copy the result with one click.
Frequently Asked Questions
What is Base64 encoding?
Base64 encoding converts binary or text data into a readable ASCII string. It is commonly used in APIs, JWT tokens, email attachments, and data URLs.
Is Base64 encryption?
No. Base64 is not encryption and provides no security. It only changes the data format.
When should I use Base64?
Use Base64 when sending binary data through text-based systems like JSON or HTTP headers.
Does this tool upload my data?
No. All encoding and decoding happens locally in your browser.
Can I upload files?
Yes. You can upload .txt files and convert their contents.
Why does decoding fail sometimes?
Decoding fails if the input is not valid Base64 or contains invalid characters.
Can I decode JWT Base64 segments?
Yes. Paste individual JWT header or payload segments to decode them.
Is this tool free?
Yes. It is completely free with no usage limits.