Base64 Encoding vs URL Encoding
Base64 converts binary-like data into text-safe characters, while URL encoding escapes characters that have special meaning inside URLs (like ?, &, =, or spaces).
When to Use Base64
- Embed small assets like images in CSS or HTML
- Decode API token fragments or payload fragments
- Convert binary-like text to a transport-safe format
When to Use URL Encoding
- Encode query string values safely
- Prepare redirect URLs
- Escape spaces and special characters
- Debug broken API request URLs
Common Encoding Mistakes
- Base64 is not encryption and provides no security.
- Missing Base64 padding (= or ==) can cause decoding errors.
- Encoding the whole URL when only query values should be encoded breaks the URL structure.
- Incorrect handling of spaces as `%20` vs `+` depending on the system.
- Unicode and emoji issues when not using proper UTF-8 encoding.
How to use
Choose Mode
Select between Base64 or URL encoding/decoding using the tabs at the top.
Enter Text
Paste or type the text you want to process in the input area.
Process
Click the Encode or Decode button to transform your text instantly.
Copy Result
Use the copy button to save the output to your clipboard.
Capabilities
Base64 Encoding
Convert binary-like data to text-safe format and back with full UTF-8 support.
URL Encoding
Safely encode special characters for use in URLs and query parameters.
Image Encoding
Convert images to Base64 Data URLs and preview them instantly in your browser.
100% Private
All processing happens locally in your browser. Your data never touches any server.
Works Offline
No internet connection required. The tool works entirely on your device.
Universal Support
Handles special characters, emojis, and various text formats seamlessly.
Developer Tools
Designed for developers with quick actions, shortcuts, and clear output.
About Encoding & Decoding
Base64 is a binary-to-text encoding scheme used to represent binary data in an ASCII string format. URL encoding, also known as percent-encoding, is a mechanism for encoding information in a Uniform Resource Identifier (URI). Both are essential for web development and data transmission.
Pro Tips
- Use URL encoding for any data you pass in a query string.
- Base64 is great for embedding small images or data in CSS/HTML.
- Remember that Base64 increases the size of the data by about 33%.
- Always verify that your decoded output matches the original input.
Keyboard Shortcuts
- Process input⌘Enter
- Clear all text⌘K
- Copy output⌘C
Frequently Asked Questions
1. What is Base64 encoding?
Base64 is an encoding scheme that represents binary data in an ASCII string format. It is commonly used to encode data that needs to be stored and transferred over media that are designed to deal with text.
2. Does Base64 encrypt data?
No. Base64 is merely an encoding format. Anyone can decode it. Never use Base64 to secure sensitive data.
3. Why does Base64 output end with `=`?
The `=` characters are padding. They are used to ensure that the encoded data is a multiple of 4 bytes in length.
4. What is URL encoding?
URL encoding (or percent-encoding) is a mechanism for safely escaping characters in a Uniform Resource Identifier (URI) so it is transmitted correctly over the internet.
5. Should I encode the full URL or only query values?
Usually, you should only encode the query string values or specific path segments. Encoding the entire URL will break the protocol (http://) and slashes.
6. Is my text uploaded?
No, all encoding and decoding operations happen locally in your web browser.
7. Can I convert an image to Base64?
Yes, you can use the Image tab to drop an image and convert it directly into a Base64 data URL.