What is image to base64 conversion used for?

Embedding images directly in HTML/CSS (data URIs), inline images in JSON APIs, embedding in markdown documents, and reducing HTTP requests for small images.

Is base64 smaller than the original image?

No. Base64 encoding is ~33% larger than the binary image. Use it only for small images (logos, icons) where the HTTP request overhead matters more.

What output formats are supported?

Plain base64 string, data URI (data:image/png;base64,...), or HTML tag with embedded image. Choose in the output panel.

Can I batch convert images to base64?

Yes. Drop multiple images, get a list of base64 strings or data URIs. Useful for generating icon fonts or sprite replacements.

Does it work with HEIC iPhone photos?

Yes. HEIC is decoded to canvas, then converted to base64. For best browser compatibility, convert to JPEG or PNG first.

Are my images uploaded?

Never. Encoding happens in your browser. The images never leave your device — fully private conversion.

Can I copy the result to clipboard?

Yes. One-click copy for plain base64, data URI, or HTML tag. Useful for pasting into CSS or HTML files.

Image to Base64

Convert any image to a Base64 encoded string

Drop image here or click to browse

No data uploaded — all processing is done in your browser.

Image to Base64 Free — Encode JPG/PNG/WebP to Data URI Online (No Upload)

Convert any image to a Base64 data URI instantly in your browser. 100% free, batch support, no watermarks — your images never leave your device. No signup, no upload, perfect for developers.

100% FreeNo UploadNo Sign-upNo WatermarkRuns in Your Browser

How to Use

Upload: Drop your image or click to browse. Supports JPG, PNG, GIF, WebP, and SVG.
Encode: Your image is instantly converted to a Base64 string.
Copy: Copy the Base64 string to your clipboard with one click.

Why Choose This Tool

100% Free: 100% free with no hidden fees, no premium tier, no usage limits.
No Upload: Files are processed entirely in your browser using JavaScript — never uploaded to any server.
No Watermark: Output images are clean with no logo, no signature, and no watermark of any kind.
Private by Design: Nothing is sent to any server. Close the tab and your files are gone forever.

How We Stack Up

Feature	Ours	Base64.Guru	Base64Image.org
No watermark	Yes	Often adds	—
Free forever	Yes	Free	Free
No upload	Yes	Uploads to server	Uploads to server
Multiple formats	JPG, PNG, GIF, WebP, SVG	Any file	Images only

Common Questions

Is my image uploaded to a server?

No. All processing happens locally in your browser. Your image never leaves your device.

Will there be a watermark on the output image?

No. Our tool never adds any logo, signature, or watermark to your output. The downloaded image is exactly what you processed.

Is it really free?

Yes — 100% free forever. No hidden fees, no premium version, no sign-up required.

Are there any usage limits?

No file count, file size, or feature restrictions. Your browser and computer are the only constraints.

Will my images be saved or stored?

No. Images are processed in-memory and discarded when you close the tab.

Does it work on mobile?

Yes. Works on phones and tablets with any modern browser (Chrome, Safari, Firefox, Edge).