KitJade
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Base64 Encoder

UTF-8-safe Base64 encoding, including URL-safe mode.

Use the Base64 Encoder tool

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What this base64 encoder does

Base64 represents binary data as printable ASCII so it can travel through systems that only accept text: email headers, data URLs, JSON fields and HTTP basic authentication. This encoder converts your text to UTF-8 bytes first, then encodes those bytes, which is why emoji and languages such as Hindi, Arabic or Chinese survive without corruption.

The URL-safe option replaces + and / with - and _, the variant required by JWTs and many RFC 7515 implementations. Everything is computed locally.

Why use it

  • Embed a small image or font directly in CSS as a data URI.
  • Build HTTP Basic Authorization headers during API testing.
  • Pass binary payloads through text-only systems safely.

How to use it

  1. 1Type or paste your text.
  2. 2Choose standard or URL-safe alphabet, and whether to keep padding.
  3. 3The encoded result updates as you type.
  4. 4Copy the output with one click.

Worked examples

ASCII text

Input

Hello, KitJade!

Output

SGVsbG8sIEhleGFLaXQh

Unicode text

Input

नमस्ते

Output

4KSo4KSu4KS44KWN4KSk4KWH

Encoding the UTF-8 bytes — not the raw code points — is what makes this round-trip correctly.

Common mistakes

  • Using Base64 as encryption. It is reversible encoding, not protection.
  • Encoding with Latin-1 semantics, which corrupts non-English text.
  • Forgetting that URL-safe Base64 drops padding, which some decoders require.

Frequently asked questions

Is Base64 a form of encryption?
No. Anyone can decode Base64 with no key. Use real encryption such as AES-GCM if confidentiality is required.
Why does Base64 make text bigger?
Every three bytes become four characters, so the encoded output is about 33% larger than the input.
When should I use the URL-safe variant?
Use it in URLs, filenames and JWT segments, where + and / have special meanings. Standard Base64 is fine in JSON and email.

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