Base64 Encoder Decoder

📝 Enter Text to Encode

Characters: 0

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Click or drag file here

Support for all file types (images, documents, PDFs, etc.)

Output Format: Single Line Formatted (76 chars per line)

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✅ Base64 Result

Characters: 0

Decoded Image Preview:

💡 Quick Examples - Click to Try

Simple Text

Hello, World!

JSON Data

{"name":"John","age":30}

URL with Parameters

https://example.com?user=test&token=abc123

Unicode Characters

Hello 世界 🌍

ℹ️ What is Base64 Encoding?

Base64 operates as a text encoding system which transforms binary information into ASCII string format through 64 printable characters (A-Z, a-z, 0-9, +, /). The encoding system enables data storage and transfer through text-based media platforms.

Common use cases:

The HTML/CSS system uses Base64 to embed images through data URIs.
The MIME standard requires Base64 encoding for email attachment transmission.
JSON and XML documents use Base64 to store their binary data content.
API authentication systems use Base64 for token encryption.
The system uses Base64 to protect sensitive information during data transfer.

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Text & Files

The system enables users to convert text content and process all file types including images and PDFs and documents and additional formats.

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Image Preview

The system shows decoded images through automatic format identification after processing.

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100% Secure

Your browser performs all processing tasks without sending files outside your device.

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Instant Results

The system provides immediate output through its real-time encoding and decoding process

About Our Base64 Encoder Decoder Tool

Convert text and files to Base64 encoding or decode Base64 strings back to their original format with our free online Base64 encoder decoder tool. Base64 encoding is an essential technique in web development, data transmission, and API integration that converts binary data into ASCII text format using 64 printable characters. This encoding scheme allows binary data like images, documents, and files to be safely transmitted over text-based protocols, embedded directly in HTML/CSS as data URIs, stored in JSON/XML documents, or included in email attachments via MIME encoding. Simply enter your text, upload a file, or paste a Base64 string to get instant results with support for all file types.

Frequently Asked Questions

What is Base64 encoding and when should I use it?

Base64 is a binary-to-text encoding method that converts binary data into ASCII text using 64 printable characters. Use Base64 when you need to transmit binary data over text-based protocols like HTTP, SMTP, or JSON APIs.

Can I encode and decode files like images and PDFs?

Yes! Our tool supports encoding and decoding all file types including images (PNG, JPEG, GIF, SVG), documents (PDF, DOC, TXT), archives (ZIP, RAR), and any other binary file format. When encoding a file, simply switch to the "File" tab and upload your file - it will be converted to a Base64 string that you can use in APIs, embed in HTML, or store in databases.

Why does my image preview not appear when decoding?

Image preview only appears when decoding valid Base64 data that represents an image file (PNG, JPEG, GIF, WebP, SVG). The Base64 string must be properly formatted and complete. If you're decoding a data URI, make sure it includes the proper format (data:image/png;base64,...)

Does Base64 encoding make my data secure or encrypted?

No, Base64 is NOT encryption and does NOT provide security. Base64 encoding is simply a way to represent binary data as text - it's completely reversible and anyone can decode it instantly.

Why is my Base64 output larger than the original data?

Base64 encoding always increases data size by approximately 33% (4/3 ratio). This happens because Base64 converts every 3 bytes of binary data into 4 ASCII characters. For example, 3 bytes (24 bits) becomes 4 Base64 characters using only 6 bits each (4 × 6 = 24 bits).