Encode text, decode Base64 strings, or turn files into data URLs — all in your browser. Nothing gets uploaded anywhere.

Input
Empty
Click to Upload Image

PNG, JPG, WebP, SVG supported.

Output

Paste Base64 or plain text on the left to see the result here.

Analysis
0 B
Input Size
0 B
Output Size
0
Characters
0
Lines
Mode Encode
Status Empty
Detected Type None

What you can do with this tool

No sign-up, no uploads, no nonsense. Just Base64 encoding and decoding that works.

Text to Base64

Paste any text and get the encoded output instantly.

File Upload

Drop a file to get its Base64 data URL with correct MIME type.

Image Preview

Decoding an image? You'll see a live preview right here.

Fully Offline

Everything happens in your browser. Zero server calls.

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Technical Use Cases

Encoding strings to Base64 is incredibly useful when dealing with data transmission across systems that strictly require text-based formats.

Common use cases include generating Basic Authentication headers (Authorization: Basic <base64>), safely storing complex strings in databases without escaping issues, or passing data through URL parameters safely.

By encoding your string to Base64, you guarantee that special characters won't break your JSON payloads, XML files, or API requests.

How to Use

  1. Type or paste the plain text string you want to encode into the left input area.

  2. The tool automatically detects the input and the "Encode" mode is pre-selected for you.

  3. Watch as the Base64 encoded result appears instantly in the right output area.

  4. Click the "Copy" button to copy the encoded string to your clipboard for immediate use.

About this tool

Everything runs securely in your browser. Your text, files, and encoded output never hit a server — there's no backend processing involved at all. This makes it safe to use with API keys, tokens, certificates, or any other sensitive data you'd rather not paste into a random website.

Frequently Asked Questions

What is string encoding in Base64?

String encoding converts standard text (like UTF-8 characters) into an ASCII string format using a specific 64-character alphabet. This ensures the data remains intact during transport across systems that might otherwise misinterpret special characters.

Can I encode a very long string?

Yes, our tool runs entirely in your browser, so you can encode very long strings without worrying about server timeouts or upload limits.

Does this tool support special characters?

Absolutely. The tool safely encodes emojis, symbols, and multi-byte UTF-8 characters into standard Base64 format.