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

Converting an image to Base64 allows you to embed the image directly into your HTML (<img> tags) or CSS files (background-image).

This technique reduces the number of HTTP requests a browser makes, speeding up initial page load times for small assets like icons, logos, or placeholders.

It's also highly useful when generating self-contained HTML documents (like email templates) where external image hosting might be blocked by email clients.

How to Use

  1. Click the "Upload" button or simply drag and drop your image file into the tool.

  2. The tool automatically processes the image locally and detects its MIME type (e.g., image/png).

  3. The Base64 string is generated instantly, complete with the correct Data URI prefix.

  4. Copy the output and paste it directly into your src attribute or CSS file.

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

Should I convert large images to Base64?

No, it is not recommended for large images. Base64 encoding increases the file size by about 33%. It is best suited for small assets under 10-20KB.

Which image formats are supported?

Our tool supports all standard web formats including PNG, JPEG, WEBP, GIF, and SVG. The correct MIME type prefix is added automatically.

Does converting an image affect its quality?

Not at all. Base64 encoding is a lossless process. The visual quality of the decoded image will be exactly identical to the original file.