Hex ↔ Base64 Converter
Convert between hexadecimal and Base64 encoding formats. Useful for working with cryptographic hashes, binary data, and encoding transformations — all processed in your browser.
Hex → Base64
Base64 → Hex
Hex vs Base64: When to use each
Hexadecimal (base-16) and Base64 (base-64) are both ways to represent binary data as text. Hex uses digits 0-9 and letters A-F, producing two characters per byte. Base64 uses a 64-character alphabet, producing roughly 4 characters per 3 bytes — making it more compact.
Developers frequently need to convert between these formats when working with cryptographic hashes (often displayed as hex) and APIs or protocols that expect Base64-encoded data.
When hex is preferred
- Displaying cryptographic hashes (SHA-256, MD5, etc.)
- Debugging binary protocols and network packets
- Color codes in CSS and design tools
When Base64 is preferred
- Embedding data in JSON, XML, or HTML
- Email attachments (MIME encoding)
- Data URIs for inline images and fonts
FAQs
Which format is more compact?
Base64 is more compact. Hex produces 2 characters per byte while Base64 produces approximately 1.33 characters per byte. For large data, Base64 saves about 33% space compared to hex.
Can I convert hex with spaces or colons?
Yes. The tool automatically strips spaces, colons, dots, dashes, and the 0x prefix before converting. Paste hex in any common format.
Is this conversion lossless?
Yes. Both hex and Base64 are exact representations of binary data. Converting in either direction produces the same underlying bytes with zero data loss.
Is this tool safe for sensitive data?
Yes. All conversions happen locally in your browser. No data is transmitted to any server.
Related Tools
Base64decode Online Encoder & Decoder
Encode or decode Base64 strings directly in your browser
Text Encoder & Decoder
Convert text to Base64 or decode Base64 to plain text
Image to Base64
Convert images to Base64 encoded strings
Base64 to Image
Decode Base64 strings back to viewable images
File to Base64
Encode any file to a Base64 string
Base64 to File
Decode any Base64 string back to its original file
Base64 to PDF
Decode Base64 strings to PDF documents
JWT Decoder
Decode and inspect JWT tokens
URL Encode/Decode
Encode or decode URLs with percent-encoding
HTML Entity Encode/Decode
Convert special characters to HTML entities and back