Base64 Encoder

Convert any plain text to Base64 instantly. This Base64 Encoder Tool turns UTF-8 text into a safe, ASCII-only string that can be transported through JSON, HTML, query strings, environment variables, and other text-based systems. It runs directly in the browser, requires no account, and is designed for developers, QA, security analysts, technical writers, students, and automation engineers who need a reliable encoder—fast.

Have encoded text? Decode with Base64 Decoder tool here!

What Is Base64 Encoding?

Base64 is a binary-to-text encoding that represents arbitrary bytes with 64 characters (A–Z, a–z, 0–9, +, /) and optional padding (=). It’s not encryption; it’s a reversible formatting method that makes data safe to pass through systems built for text. Because non-printable bytes and high-Unicode symbols can break parsing, Base64 helps normalize payloads into a compact, portable form.

• Why it’s useful: preserves data integrity across email (MIME), JSON APIs, HTML attributes, YAML, logs, and CLI tools.
• Trade-off: payload size grows by ~33% compared to the original bytes—acceptable for many integration tasks.

Why Use This Encoder

How to Encode Text (Step-by-Step)

1. Type or paste your plain text into the Input (Plain Text) box at the top of the page.
2. Click Encode.
3. Copy your Base64 from the Output (Base64 Text) area.

Tip: If you’re preparing data for a URL, you may also URL-encode the result (%2B for +, %2F for /, etc.) when required by your destination system.

Quick Examples (Copy & Encode)

Example 1 – Simple Text

Input: Hello World
Base64: SGVsbG8gV29ybGQ=

Example 2 – JSON Payload

Input: {"ok":true,"user":"alice"}
Base64: eyJvayI6dHJ1ZSwidXNlciI6ImFsaWNlIn0=

Example 3 – Emoji & Unicode

Input: 🔥 Data ready – café ☕
Base64: 8J+UpiBEYXRhIHJlYWR5IOKAkyBjYWZlIPCfmYw=

Popular Use Cases

• APIs & Webhooks: Encode binary fragments or signatures into JSON bodies.
• Front-end: Create data URIs (e.g., data:image/png;base64, ...) for small assets.
• Back-end & DevOps: Store tokens/secrets in env files where only text is allowed (note: Base64 ≠ security).
• Documentation: Provide copy-paste-able samples that won’t corrupt in Markdown/HTML.
• Security R&D: Safely wrap bytes for transport during analysis and testing.

Best Practices & Tips

• Not encryption: Anyone can decode Base64. Don’t treat it as a security layer.
• Line breaks: Some systems wrap output—remove CR/LF if your target expects a single line.
• URL contexts: Use URL-safe Base64 when needed (- instead of +, _ instead of /), then trim padding if the spec requires.
• Binary sources: To Base64-encode a file, use a language/toolchain method (see developer snippets below).

Who Benefits from a Base64 Encoder?

Developers, QA, SRE/DevOps, cybersecurity teams, data engineers, educators, and technical writers who frequently move data across systems that only accept text. It’s ideal for quick conversions during debugging, demos, and integration work.

FAQ

Is Base64 secure?

No. It’s a reversible encoding, not encryption. Use cryptography for confidentiality.

Does this encoder support Unicode and emojis?

Yes. The encoder is UTF-8 aware, so non-ASCII characters are handled correctly.

Can I encode very long text?

Yes. Processing runs locally in your browser and is optimized for long inputs.

What’s the difference between Base64 and Base64-URL?

Base64-URL replaces + with - and / with _, and often removes padding, making it safer for URLs and filenames.

Developer Snippets

Encode in JavaScript

// Text (UTF-8) → Base64
function textToB64(text) {
  const bytes = new TextEncoder().encode(text);
  let binary = "";
  bytes.forEach(b => binary += String.fromCharCode(b));
  return btoa(binary);
}
console.log(textToB64("Hello World")); // SGVsbG8gV29ybGQ=

Encode in PHP

<?php
echo base64_encode("Hello World"); // SGVsbG8gV29ybGQ=
?>

Encode in Python

import base64
print(base64.b64encode("Hello World".encode("utf-8")).decode("ascii"))
# SGVsbG8gV29ybGQ=