What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters. It is commonly used to embed images in HTML/CSS, transmit data in URLs, and encode email attachments.

Does this tool support Unicode text?

Yes. The tool handles Unicode (UTF-8) text correctly, including special characters, emojis, and non-Latin scripts like Chinese, Arabic, and Cyrillic.

Is there a size limit for encoding?

There is no hard limit set by PDFFlare. However, since encoding happens in your browser, very large inputs may slow down depending on your device's memory and processing power.

Yes. All encoding and decoding happens in your browser. Your data is never sent to any server — it stays entirely on your device.

Can I decode Base64-encoded images?

This tool decodes Base64 strings to text. For Base64-encoded binary data like images, the decoded output may contain non-printable characters. Use a dedicated image decoder for those cases.

Base64 Encode & Decode Online — Free

Encode and decode Base64 strings online for free. Instant conversion with copy-to-clipboard support.

Input

Output

How to Base64 Encode & Decode

Enter your text or Base64 string
Type or paste the text you want to encode, or a Base64 string you want to decode, into the input area.
Click Encode or Decode
Click 'Encode' to convert plain text to Base64, or 'Decode' to convert a Base64 string back to readable text.
Copy the result
Click 'Copy Output' to copy the converted result to your clipboard for use in your code or project.

Why Use PDFFlare Base64 Encoder?

Instant Conversion

Encode or decode Base64 strings in milliseconds. No loading screens — results appear immediately.

Unicode Support

Full UTF-8 support means special characters, emojis, and non-Latin scripts encode and decode correctly.

One-Click Copy

Copy the encoded or decoded result to your clipboard with a single click. Ready to paste into your code.

100% Client-Side

All processing happens in your browser. Your data never leaves your device — safe for sensitive content.

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