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More about Base64

Published

In this guide

This learning guide on Base64Encoding explains more in plain language for developers and everyday users.

Everything important stays private: try the matching converter or tool in your browser — files and tokens are not uploaded.

Read the full English article below for code samples and edge cases, or switch language anytime from the menu. We keep expanding translations from real user feedback.

Try these private tools next

Base64 compared with other binary-to-text encodings

Encoding Alphabet size Overhead Typical use
Hex (Base16) 16 +100% Hashes, debugging, colours
Base32 32 +60% TOTP secrets, case-insensitive IDs
Base58 58 +37% Bitcoin addresses (no 0/O/I/l confusion)
Base64 64 +33% E-mail, data URIs, JSON, JWT
Ascii85 / Base85 85 +25% PDF, PostScript, Git binary patches
Uuencode 64 +35% (+ line overhead) Legacy Usenet / e-mail

Base64 wins in practice because its alphabet survives almost every system, the 3-to-4 ratio is easy to implement, and every language ships it.

ASCII 對照表 Complete ASCII table from 0 to 127 with decimal, hexadecimal and binary codes, control character names and the Base64 encoding of each byte.

常見問題

Does this page upload my data?

No. Articles are static. Linked tools run locally in your browser unless a feature explicitly needs a network relay.

Can I request a translation or a new tool?

Yes — use the private feedback form. We prioritize what users ask for across languages.

What is the fastest way to try more?

Open the homepage Base64 converter or the related tools linked on this page and paste a sample.

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