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Hex to Base64

Convert hexadecimal data to Base64 encoding.

hexbase64convert

What is Hex to Base64?

The Hex to Base64 tool converts hexadecimal-encoded data into its Base64 representation, bridging two of the most commonly used encoding formats in software development. Hexadecimal is widely used to represent binary data in a human-readable form — think cryptographic hashes, byte sequences, or raw binary buffers — while Base64 is the standard for encoding binary data in text-based contexts like JSON payloads, HTTP headers, and data URIs.

This tool is invaluable for developers who work across different encoding layers in their stack. Whether you're inspecting the output of a hash function, transforming data for an API that expects Base64 input, or debugging encoding pipelines, converting from hex to Base64 quickly and accurately saves significant time and eliminates manual conversion errors.

How to Use

Using this tool is straightforward: paste your hexadecimal string into the input field and the Base64-encoded result is generated instantly. The input should be a valid hex string composed of characters 0–9 and a–f (case-insensitive), typically representing bytes as pairs of hex digits — for example, 48656c6c6f converts to SGVsbG8=. Spaces and common separators between byte pairs are handled gracefully in most cases.

The output is standard Base64 encoding as defined by RFC 4648, including = padding characters where necessary to align the output to a multiple of 4 characters. If you need URL-safe Base64 (replacing + with - and / with _), note that this tool produces the standard alphabet — keep that distinction in mind when working with JWT tokens or URL-embedded data.

A key edge case to watch for is odd-length hex strings. A valid hex string must have an even number of characters, since each byte is represented by exactly two hex digits. Submitting an odd-length string will result in an error or unexpected output. Also ensure your hex input does not contain 0x prefixes or non-hex characters, as these will need to be stripped before conversion.

Use Cases

Cryptographic hash encoding: Hash functions like MD5, SHA-1, and SHA-256 typically output raw bytes represented as hex strings. Use this tool to convert those hex digests into Base64 for embedding in HTTP headers such as `Content-MD5` or for use in authentication schemes that require Base64-encoded hashes.
API payload transformation: Some APIs return binary data as hex-encoded strings but require Base64 when that data is embedded inside JSON or XML. Converting on the fly lets you reformat data without writing throwaway scripts just to bridge the encoding gap.
Debugging cryptography and TLS: When inspecting certificate fingerprints, session keys, or encrypted payloads captured in hex (e.g., from Wireshark or OpenSSL output), converting to Base64 makes it easier to compare against values expected by libraries and services that use Base64 natively.
Data URI construction: If you have a resource's binary content expressed as a hex dump — such as a small image or font file — converting it to Base64 is the required step before embedding it as a `data:` URI in HTML or CSS.

Related Tools

Base64 Encoder
Encode text or data to Base64 format.
Hex Encoder
Encode text to hexadecimal representation.
Base64 to Hex
Convert Base64 encoded data to hexadecimal.