Base64 Encoder/Decoder
Professional Base64 encoding and decoding tool. Supports UTF-8, URL-safe variant, and file processing. All operations happen locally in your browser.
Output will appear here...About Base64 Encoding
What is Base64?
Base64 is a binary-to-text encoding scheme that converts binary data into a string of ASCII characters, making it safe for text-based protocols.
Standard vs URL-Safe
Standard Base64 uses +, /, and = characters. URL-safe variant uses -, _ instead and removes padding for use in URLs.
Common Uses
- • Data URLs for images
- • API authentication (JWT)
- • Email attachments
- • Embedding binary in JSON
How to use the Base64 Encoder/Decoder?
- 1Select the **Encode** or **Decode** mode from the toggle.
- 2Type or paste your data into the input box, or upload a file.
- 3Click the **Encode/Decode** button to process your request.
- 4Copy the output or download it as a text file.
Tool FAQ
What is URL-Safe Base64?
It's a variant that replaces characters like `+` and `/` with `-` and `_` to make the string safe for use in URLs and filenames.
Is there a limit on input size?
You can process text of any length. For file uploads, we support files up to 5MB for optimal performance.
Features
UTF-8 Support
Full Unicode & emoji support
URL-Safe Mode
RFC 4648 compliant
File Upload
Process files up to 5MB
Download
Save output as file
Swap
Quick encode/decode switch
Copy
One-click clipboard copy
No Limits
Process any text length
100% Private
Client-side processing
100% Private & Secure
All encoding and decoding happens in your browser. Your data is never sent to any server.