Conversion
Image to Base64
Encode images to Base64 / Data URI and decode Base64 back to images - instantly, in your browser.
Your files stay on your device - processed locally via WebAssembly, never uploaded
Drop images to encode
JPEG, PNG, WebP, GIF, BMP, SVG - single or batch
Embed this tool on your website
Copy this code to add the Image to Base64 to your site for free. It runs entirely in your visitors' browsers - no API key, no usage limits.
<iframe src="https://optipix.art/embed/image-to-base64" width="100%" height="600" style="border:1px solid #e4e4e7;border-radius:8px;" title="Image to Base64 by OptiPix" loading="lazy"></iframe> <p style="font-size:12px">Free tool by <a href="https://optipix.art/image-to-base64">OptiPix Image to Base64</a></p>
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About Image to Base64
Last updated: June 2026
OptiPix Image to Base64 converts any image into a Base64 data URI you can embed directly in HTML, CSS, JSON, or APIs - and decodes Base64 strings back into downloadable images. Drop a JPEG, PNG, WebP, GIF, BMP, or SVG and instantly see the full data URI, the raw Base64 string, character count, original size vs encoded size, and ready-to-paste HTML / CSS snippets. Re-encode as PNG, JPEG (with quality control), or WebP to find the smallest possible Base64 representation. Paste any Base64 string back into the decoder to preview and download the original image. Batch mode lets you encode many images at once and copy them all as a JSON array. Everything runs locally - files are read with FileReader and never uploaded.
How It Works
Encoding uses FileReader.readAsDataURL for instant Base64, with optional canvas re-encoding to switch format. Decoding loads the data URI into an Image, draws it onto a canvas, and exports as a downloadable Blob.
Use Cases
- •Inline a small icon in CSS to save an HTTP request
- •Embed images in an HTML email that needs to render offline
- •Send an image to an API expecting Base64 in JSON
- •Decode a Base64 blob you received in a webhook
- •Reduce a Base64 string by re-encoding the image as WebP
You Might Also Like
If you find Image to Base64 useful, check out these related tools: Format Converter, Image Compressor, and Image to SVG. All tools run entirely in your browser with no uploads or signups required.
Explore more: Browse all tools · Step-by-step guides · Tips & tutorials · Compare tools
Frequently Asked Questions
Why is the Base64 string bigger than the original file?
Where can I use a Base64 image?
Is decoding safe?
Can I batch encode multiple images?
What's the difference between data URI and raw Base64?
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