What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used to embed images in HTML/CSS, encode email attachments, and transmit data via APIs.

How does the Base64 Encoder/Decoder work?

Simply enter text in the input field and click 'Encode' to convert it to Base64, or enter Base64 and click 'Decode' to convert it back to readable text. The tool updates in real-time and supports file uploads.

Is my data secure when using this tool?

Yes, all encoding and decoding operations are performed locally in your browser. No data is sent to any server, and all information is cleared when you close or refresh the page.

Does the tool support UTF-8 characters and emojis?

Yes, the tool fully supports UTF-8 characters including emojis, special symbols, and non-Latin scripts. The encoder properly handles multi-byte characters.

Can I encode files to Base64?

Yes, you can upload text-based files like .txt, .json, .html, .css, .js, .xml, and .csv. The file content is read locally and encoded to Base64 in your browser.

What's the difference between btoa() and atob()?

btoa() (binary to ASCII) encodes a string to Base64, while atob() (ASCII to binary) decodes Base64 back to a string. This tool uses these JavaScript functions with UTF-8 support.

Is the Base64 Encoder/Decoder free to use?

Yes, the Base64 Encoder/Decoder on Easy Tools HQ is completely free and works directly in your browser with no registration required.

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text instantly

Base64 encoding is a fundamental tool for developers. It converts binary data to ASCII text, making it safe for transmission in URLs, JSON, HTML, and email. Our Base64 Encoder/Decoder handles UTF-8 characters, supports file uploads, and gives you real-time results — all in your browser.

How to Use the Base64 Encoder / Decoder

Our Base64 Encoder/Decoder makes it easy to convert between text and Base64 format. Here's how to use it:

Enter your text – Type or paste your text into the input field on the left.
Encode – Click the "Encode" button to convert your text to Base64 format. The result appears on the right.
Decode – Enter Base64 text and click "Decode" to convert it back to readable text.
Swap – Click "Swap" to exchange the input and output fields, making it easy to convert in the opposite direction.
Upload files – Click the upload area or drag and drop a file (.txt, .json, .html, .css, .js) to encode its contents.
Copy results – Click "Copy" to copy the encoded or decoded output to your clipboard.

Encode & Decode

Both directions supported

UTF-8 Support

Emojis and special chars

File Upload

Drag and drop files

One-Click Copy

Copy results instantly

Text to Encode

52 chars

Click to upload or drag and drop

Supports .txt, .json, .html, .css, .js files

Base64 Result

SGVsbG8sIFdvcmxkISBXZWxjb21lIHRvIEVhc3kgVG9vbHMgSFEu

52 chars

Valid Base64

52 52 B +33%

Base64 encoding converts binary data to ASCII text format. It's commonly used for embedding images in HTML/CSS, encoding attachments in emails, and transmitting data via APIs.

Data Processing & Security Disclaimer

The Base64 Encoder/Decoder provided by Easy Tools HQ is for general informational and development purposes only. All encoding and decoding operations are performed locally in your browser — no data is sent to our servers.

Important security notice: While this tool processes data entirely in your browser, please exercise caution when handling:

Sensitive information – passwords, API keys, tokens, or personal data
Proprietary code or intellectual property
Binary files containing confidential information
Large files – processing may impact browser performance

Client-side processing: All encoding/decoding happens locally using JavaScript's built-in `btoa()` and `atob()` functions. File uploads are read directly in your browser and are never transmitted to any server. Once you close or refresh the page, all data is permanently cleared.

Easy Tools HQ is not responsible for any data loss, security breaches, or unintended disclosure of information resulting from the use of this tool. Always verify encoded/decoded output before using in production environments.

Last Updated: March 2026

Client-side • No server storage • Local processing