Can I encode images to Base64?

Yes. Upload any image file and get its Base64 representation. You can use this to embed images directly in HTML or CSS without separate file requests.

Is Base64 encryption?

No. Base64 is an encoding scheme, not encryption. It transforms data into a different representation but does not provide any security. Anyone can decode Base64 strings.

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Encode and decode Base64 strings

Free Base64 Encoder/Decoder - Convert Base64 Online

Encode and decode Base64 strings instantly with our free Base64 converter. Support for text, images, and files.

Base64 Encoder/Decoder

Encode and decode text or files to Base64

Input

Output

0 chars → 0 chars

What Is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that converts binary data into a string of ASCII characters. It is commonly used to embed images in HTML or CSS, encode email attachments (MIME), transmit binary data through text-only channels like JSON APIs, and store small files as strings in databases. Base64-encoded data is approximately 33% larger than the original, but the trade-off is universal compatibility with text-based protocols and systems.

How to Use This Free Base64 Encoder/Decoder

1
Paste text or upload a file you want to encode.
2
Click "Encode" to convert to Base64, or "Decode" to convert back.
3
View the result instantly in the output area.
4
Copy the Base64 string to your clipboard.
5
Use the decoded output directly or download it as a file.

Key Features

Encode text and files to Base64 instantly
Decode Base64 strings back to original content
Support for text, images, PDFs, and binary files
Generate data URIs for embedding in HTML/CSS
File upload for encoding binary files
All processing happens locally in your browser

Why Use FreeDevKit?

Essential developer tool for data encoding tasks
Perfect for embedding images in HTML emails and CSS
Free, instant, and handles both encoding and decoding
No data leaves your device — safe for sensitive content

Frequently Asked Questions

Base64 represents 3 bytes of binary data as 4 ASCII characters, resulting in approximately 33% size increase. This trade-off enables binary data to be safely transmitted through text-based protocols.