Understanding Encoding Formats
Base64 encoding represents binary data as printable ASCII text, making it useful for embedding images, encoding email attachments, and passing data through text-only channels. URL encoding (percent-encoding) escapes reserved characters so text can safely travel inside a URL. Hexadecimal encoding represents each byte as two hex digits, often used in debugging, cryptography, and low-level data inspection. Remember: encoding is not encryption - it provides no confidentiality, only format conversion.
Common Use Cases
Developers use this tool to debug API payloads, prepare data for embedding in HTML or JSON, and decode tokens for troubleshooting. Looking for real security instead of formatting? Try our hash generator for cryptographic fingerprints, or our password generator to create a strong credential.
How to use it
- Choose a format: Base64, URL encoding, or Hexadecimal.
- Switch between Encode and Decode with the toggle.
- Type your text in the Input box; the Output box updates automatically. Copy the result when ready.
Example
Encoding hello world as Base64 yields aGVsbG8gd29ybGQ=. URL-encoding the same string yields hello%20world, escaping the space so it can travel safely inside a query string. Switch to Decode and paste either output back to recover the original text.
Limitations
- Encoding is not encryption. Anyone can decode Base64, URL, or Hex instantly — never use these to protect secrets.
- Base64 decode of non-Base64 input will throw an error; the tool shows an error message rather than garbage.
- Hex encoding here works on the UTF-16 code units of the input, so multi-byte emoji may not round-trip as expected.