Base64 Encoder Decoder Online

Instantly Encode Text to Base64 or Decode Base64 Online

URL-safe Base64 swaps + and / for - and _, and removes = padding—ensuring safe use in URLs, API keys, or JWT tokens by preventing URL-breaking characters.
Need to convert images or files? Try our Image to Base64, Base64 to Image, or File to Base64 utilities. For checking and validation, use our Base64 Validator or generate safe web strings with URL-Safe Base64.

Blazing-fast and privacy-focused Base64 conversion—your data never leaves your browser.

Use Base64 to quickly transmit images, files, and data as text through emails, APIs, or webpages. Our secure Base64 tool lets you encode or decode easily, including URL-safe encoding for JWTs, API keys, URLs, and more.

Understanding Base64 Encoding

Quickly encode or decode Base64 for free—instantly, securely, and without any server processing. Ideal for developers, students, and anyone who needs to convert between text and Base64. Embed or transfer files as text seamlessly—especially helpful in web development, file transfers, and secure communications. Your data remains 100% private with in-browser conversion for top speed and security.

How Base64 Encoding Works

Base64 encodes text or binary data into a sequence of 64 different ASCII characters, making it simple to transfer data through systems that handle text only, like email or web APIs. Decoding reverses the process to restore the original content. Our tool uses universally standard Base64 compatible with major programming platforms.

How to Use This Base64 Converter

  1. Enter or paste your plain text or Base64 data in the box above.
  2. Click 'Encode to Base64' to encode, or 'Decode from Base64' to decode—toggle URL-safe if required.
  3. Copy your result instantly from the output box for use in any project.
  4. If you enter invalid Base64, an error will help you fix your input.

Top Ways Base64 is Used Online

  • Embedding images or fonts in HTML, CSS, or SVG directly with Base64 data URIs.
  • Encoding and transmitting files or binary data in API requests or JSON/XML documents.
  • Decoding server replies or tokens in APIs and JWTs that use Base64 encoding.
  • Debugging or inspecting Base64 in cookies, JWTs, config files, or email content.
  • Fast, secure testing and verification of Base64 during development.
  • Teaching or learning about encoding/decoding for software and security education.

Why Use Our Online Base64 Converter?

  • Immediate results—no loading or latency.
  • No uploads or tracking—absolute privacy in your browser.
  • Always free, unlimited usage—no hidden costs.
  • Designed for developers, IT teams, and learners.
  • Fully responsive—works on any device, anywhere.
  • Works universally across all browsers and operating systems.

Base64 Standards, References & Learning Resources