Instant Base64 to Text Conversion

Our Base64 Decode tool provides a straightforward way to reverse Base64 encoding. Base64 is a method for converting binary data (like images or executables) into a sequence of printable ASCII characters. This is essential for transmitting data over channels that only reliably support text. This tool takes that text string and converts it back into its original form, which for many U.S. developers and IT professionals, is often human-readable text.

Whether you're working with API responses, parsing JWT tokens, or examining data URIs, our decoder makes the process simple and secure. All decoding is performed locally in your browser, meaning your sensitive data is never transmitted over the internet.

How to Use the Base64 Decoder

1. Paste Your String: Copy your Base64 encoded string and paste it into the "Base64 Encoded String" input field above.
2. Click Decode: Press the "Decode" button. The tool will immediately process the string.
3. Get the Result: The original, decoded text will appear in the "Decoded Output" box, ready for you to copy or analyze.

Frequently Asked Questions About Base64 Decode

What is Base64 decoding used for?

Base64 decoding reverses the Base64 encoding process, converting a text string back into its original binary data. It's commonly used in web development to read data from APIs, interpret data URIs (e.g., inline images in HTML/CSS), and extract file content from email attachments or JSON payloads.

How do I decode a Base64 string to text?

Using our tool is the simplest way. Just paste your Base64 encoded string into the input field and click the 'Decode' button. The tool will instantly convert the string into its original, human-readable text format in the output box below.

Can you decode a file from a Base64 string?

While this tool is optimized for decoding Base64 to plain text, the underlying data of a Base64 string can represent a file (like an image or PDF). Developers can use the decoded output programmatically to reconstruct the original file. However, this online tool displays the result as text, which would appear as garbled characters for a non-text file.

Is it safe to use an online Base64 decoder?

Our Base64 Decode tool is completely safe because all decoding happens directly in your browser (client-side). Your data is never sent to our servers, ensuring your information remains private and secure. You can even disconnect from the internet after loading the page, and the tool will still work.

Why am I getting an "invalid Base64 string" error?

This error occurs if the input string is not a valid Base64 sequence. Common causes include: characters that are not part of the Base64 alphabet (A-Z, a-z, 0-9, +, /), incorrect padding with = characters at the end, or if the string length isn't a multiple of 4. Double-check your string for any corruption or missing characters.