Base64 vs Hex
Base64 or Hex encoding? Size overhead, readability and where each is conventional.
Reviewed by The Markvibe Team · Last updated 2026-06-28
Base64 and hex (Base16) both encode arbitrary binary as printable ASCII. Base64 is denser — 4 chars per 3 bytes vs hex's 2 chars per 1 byte — so it dominates payload-sensitive contexts like JWTs and data URIs. Hex remains the convention for displaying cryptographic hashes and binary debugging.
Side-by-side comparison
| Feature | Base64 | Hex |
|---|---|---|
| Size overhead | +33% | +100% |
| Alphabet | 64 chars (A-Z a-z 0-9 + /) | 16 chars (0-9 a-f) |
| Conventional for | JWT, data URI, MIME | Hashes, MAC addresses, debugging |
| Case sensitivity | Yes | No |
Our recommendation
Use Base64 when payload size matters. Use hex when humans need to read or compare the value at a glance.
Try
Base64 tool →
More comparisons
- MD5 vs SHA-256 — Which hash function should you use in 2026? Speed, collision resistance and modern recommendations compared.
- UUID v4 vs Nano ID — UUID v4 or Nano ID for identifiers? Length, collision risk and URL-friendliness compared.
- JSON vs YAML — JSON or YAML for configuration? Readability, parsing, and gotchas compared.
- WebP vs AVIF — WebP or AVIF for web images in 2026? Compression, browser support and encoding speed compared.
- CSV vs JSON — CSV or JSON for data export? Size, schema and tooling compared.