What is Base64 encoding?

Base64 converts binary data into a text string using 64 printable ASCII characters. It is used to safely transmit data over text-based protocols like email, HTTP headers, and JSON payloads.

How do I encode text to Base64?

Paste your text into the input field and click Encode. The Base64-encoded output appears instantly.

How do I decode a Base64 string?

Switch to Decode mode, paste the Base64-encoded string into the input, and the original text is displayed immediately.

Is Base64 encoding the same as encryption?

No. Base64 is encoding, not encryption. Anyone can decode a Base64 string without any key. Never use Base64 alone to protect sensitive data.

What is Base64 used for in web development?

Base64 is used to embed images inline in HTML/CSS, encode email attachments, store files in JSON APIs, and transmit binary data in HTTP headers and JWT tokens.

Tools / Base64

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 strings back to plain text. Everything runs locally in your browser.

Plain Text

Base64 Encoded

Base64 Encoding for Developer Workflows

Encode Text

Convert plain text, JSON snippets, credentials, or configuration strings into Base64 for transport or storage.

Decode Safely

Paste Base64 input and decode it back into readable text with immediate validation for malformed strings.

Stay Local

The conversion runs in your browser using vanilla JavaScript, so your input does not need to leave the page.

What is Base64?

Base64 is a binary-to-text encoding scheme that represents data using a safe ASCII character set. It is common in API payloads, email attachments, data URLs, Basic Authentication headers, and JWT-related workflows.

Is Base64 Encryption?

No. Base64 is encoding, not encryption. Anyone can decode a Base64 string without a secret key, so it should not be used to protect passwords or sensitive data.

Frequently Asked Questions

What is Base64 encoding?: Base64 converts binary data into a text string using 64 printable ASCII characters. It is used to safely transmit data over text-based protocols like email, HTTP headers, and JSON payloads.
How do I encode text to Base64?: Paste your text into the input field and click Encode. The Base64-encoded output appears instantly. You can also type directly and the output updates in real time.
How do I decode a Base64 string?: Switch to Decode mode, paste the Base64-encoded string into the input, and the original text is displayed immediately. Padding characters (=) at the end are handled automatically.
Is Base64 encoding the same as encryption?: No. Base64 is encoding, not encryption. Anyone can decode a Base64 string without any key. Never use Base64 alone to protect sensitive data — it provides zero security.
What is Base64 used for in web development?: Base64 is used to embed images inline in HTML and CSS (data URIs), encode binary attachments in email (MIME), store small files in JSON APIs, and transmit binary data in HTTP headers and JWT tokens.

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