Base64 Encode & Decode

Base64 Tool

EncodeDecode

Response

Valid

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Upload a file or type text to generate Base64.

What Is Base64 Encode & Decode?

The encoding scheme of base64 is a binary-to-text encoding scheme that is designed specifically to encode binary data in a way that is safe and compatible with text data. It's done using a 64-character alphabet that includes uppercase and lowercase letters, numbers, and the two symbols "+"/"/". This encoding scheme is safe and reliable on any platform, with the "=" character sometimes used as a base64 encoding pad character to ensure that the string is the correct length.

The reason that base64-encoded strings are safe and reliable is that every byte of binary data is represented using only "safe" text characters. This allows base64-encoded strings to be transmitted over any communication protocol that may attempt to corrupt binary data, such as in an email, JSON, XML, and even in URL strings.

The base64 image online tool is tool that can be used by anyone who needs to encode or decode images to and from Base64 strings. It is important to note that Base64 is an encoding format and not an encryption algorithm. Anyone who receives a Base64 string can decode it instantly without a key or password. If you need to protect sensitive data, always combine Base64 with a proper encryption mechanism such as AES or TLS. Our tool processes everything locally in your browser so your data never leaves your device.

How to Use the Base64 Tool?

Follow these steps to encode text or files to Base64, or decode a Base64 string back to its original form.

1

Select Encode or Decode mode using the toggle switch at the top of the input card.

2

Choose Text or File input. For text, type or paste your content directly. For files, drag and drop or click to upload (max 10 MB).

3

The output appears instantly in the Response panel on the right. For text input, conversion happens as you type.

4

Use the Copy button to copy the result to your clipboard, or click the Download button to save it as a text file.

5

In Decode mode, an additional Download as File button lets you reconstruct and save the original binary file from the Base64 string.

"All of the processing happens entirely in your browser. No data is ever sent to a server, making this tool safe for encoding API keys, tokens, and other values."

Why Use Our Base64 Encoder & Decoder?

A fast, private, and feature-rich tool built for developers and everyday users who need reliable Base64 conversion without privacy trade-offs.

100% Client-Side Privacy

All Base64 encoding and decoding is done client-side in your browser, without sending any data to a server, ensuring your data privacy is completely protected.

Instant Real-Time Conversion

Our results for base64 encoder decoder are shown as you type, with absolutely no delay. The real-time processing engine is designed to handle text input with a debounce effect.

File Encode & Decode Support

You can upload files of various types and convert them to Base64 strings, base64 to image, base64 to pdf, CSVs, etc., or upload a Base64 encoded text file to decode it back into the original binary form.

Download Output Instantly

Save your base64 encoded or decoded result as a text file with one click. Binary decode results can also be downloaded as the original reconstructed file.

Supports Multiple Data Types

Works seamlessly with plain text, JSON payloads, HTML content, API tokens, image data URIs, and binary files - covering the most common use cases.

Built for Developers

Developers were at the forefront of our minds when we built this tool. With it, you can quickly encode API keys to base64, encode JWT tokens to base64, or config values, as well as decode Base64 data from REST API calls, in your browser.

Copy Output with One Click

The built-in Copy to Clipboard feature makes it quick and simple to copy the encoded or decoded base64 output, allowing you to paste it straight into your code, terminal, or documentation.

No Registration Required

You don't need an account, subscription, or plugin installation to get started with the tool. Just open the webpage and start converting data immediately.

Common questions about Base64 encoding and decoding.

Base64 Encode & Decode FAQ

Base64 encoding is a binary encoding scheme that represents binary data using a 64-character subset of ASCII. The base64 encode subset consists of all alphanumeric characters and some special characters. Base64 encoding is typically used for representing binary data in text formats such as JSON, XML, HTML, and email message bodies.
No. Although base64 encoding is often used for encoding binary data before sending it over an unsecured channel, it is not encryption. The reason for Base64 encoding does not protect or hide the information. Anyone with access to the Base64 string will be able to decode it with our base64 decode online tool.
Base64 encoding represents each 3-byte binary string using 4 ASCII characters. It means that Base64 encoding increases the size of the string by 33%. The base64 encode online increase in size is an unavoidable cost for text-safe representation of binary strings.
You can use Base64 when you need to embed binary data inside a text-based protocol or format. Common scenarios include embedding images in CSS data URIs, passing binary data in JSON API requests, encoding email attachments in MIME.
Standard Base64 uses the characters + and / which have special meaning in URLs. URL-safe Base64 or base64 url encode replaces + with - and / with _, making encoded strings safe to include directly in URLs and query strings without percent-encoding.
Yes, you can decode any valid Base64 string, including data URIs, encoded API tokens, or plain encoded text with our base64 decode online. If the string is malformed or contains characters outside the Base64 alphabet, the tool will show an error message.
No.The base 64 converter online tool processes all data locally in your browser using JavaScript. None of the input or uploaded data is sent to a server or stored/logged locally. It is safe to use with sensitive strings.
The tools support verious types of file like base 64 to pdf, base 64 to text, base64 to image, CSV, JSON, PNG files with sizes up to 10 MB. The file you input using the file dialog will be read as binary in the browser and encoded as a data string.
You can input the Base64 encoded image data in the input area and switch the mode to Decode. The tool will output the binary data as text.
When you type or paste text, the tool encodes the raw UTF-8 characters to Base64. When you upload a file, the browser reads the binary content and converts the full file to a Base64 string, which can later be decoded back to the original binary file.

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Disclaimer

The Base64 Encode & Decode tool is provided for educational and developmental purposes. While we ensure privacy by processing data locally, we recommend avoiding the conversion of sensitive or confidential credentials on public platforms.