Free Base64 Encoder & Decoder OnlineEncode or decode Base64 instantly with fast, private in-browser processing.

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About Base64 Encoding

What is Base64?

Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format. It's commonly used to encode data that needs to be stored and transferred over media designed to deal with text.

Common Uses

✅ Embedding images in HTML/CSS
✅ Sending binary data over email
✅ Storing complex data in databases
✅ Data URLs in web applications

Features

✅ Encode text to Base64
✅ Decode Base64 to text
✅ Support for UTF-8 characters
✅ Image file encoding
✅ Image preview for decoded data
✅ Copy to clipboard
✅ Download results

Overview

Encode and decode Base64 instantly with a free, online tool that runs entirely in your browser. Convert text, JSON, or small files into Base64 for safe transport, or decode Base64 back to readable content in a single click.

Developers use Base64 when embedding images, sending binary data through APIs, or troubleshooting encoded payloads. This tool keeps everything client-side, so your data stays private and you get immediate results without registration. Whether you are preparing a data URI, validating an auth header, or decoding a webhook payload, you can work quickly and securely.

Base64 is a practical way to move bytes through text-only systems, but it can be tedious to encode and decode by hand. Use this page to sanity-check output, confirm round trips, and share clean results with teammates without relying on external services.

Encode or decode text with one-click copy and download.
Toggle between modes without losing your input.
Upload small files to generate Base64 strings.
Runs fully in-browser for fast, private processing.

How to Use

Use the encode and decode modes to move data between readable text and Base64 safely.

Select Encode or Decode based on your task.
Paste text/Base64 or upload a file for encoding.
Click Convert to generate the result instantly.
Copy or download the output for your workflow.

Common Use Cases

Base64 helps move binary data through systems that only accept text, especially in APIs and configs.

Embedding images as data URIs in HTML or CSS.
Encoding binary blobs for API requests.
Decoding Base64 from JWTs or webhook payloads.
Testing email attachments or file uploads.

FAQ

Is Base64 encryption?

No. Base64 is an encoding format, not a security or encryption method. Use HTTPS or encryption when privacy is required.

Are my files uploaded?

No. Encoding and decoding happen locally in your browser. Nothing is sent to a server.

Why does Base64 look longer?

Base64 expands data size by about 33%, which is normal for the format. The overhead is the tradeoff for safe text transport.