Base64 Image Encoder — Convert Image to Base64 String
Convert images to Base64 strings online. Embed images directly in HTML/CSS. Supports JPG, PNG, GIF, SVG. Fast and secure.
Click or drag image here
Supports JPG, PNG, WebP up to 10MB
What is Base64 Image Encoder?
The Base64 Image Encoder is a developer tool that converts an image file into a Base64-encoded string. Base64 is a binary-to-text encoding scheme that represents binary data (like an image) in an ASCII string format. This string can be embedded directly into HTML (using the <img> tag) or CSS (background-image), eliminating the need for a separate HTTP request to fetch the image file. This is particularly useful for small icons, logos, or email signatures where you want to ensure the image loads instantly and doesn't break if the external file is missing.
Input Formats
Any image file
JPG, PNG, GIF, SVG
Output Results
Base64 string
HTML <img> tag
CSS background property
Key Features
Reduce HTTP Requests: Speed up page loads by inlining small images
Email Friendly: Embed logos directly in email signatures (no broken links)
Universal Support: Works in all modern browsers and email clients
Privacy: 100% Client-side processing
Code Ready: Generates ready-to-paste HTML <img> tags and CSS
Format Support: Handles JPG, PNG, GIF, SVG, and WebP
Preview: Instantly see the decoded image to verify correctness
Advanced & Free: The most advanced free Base64 image encoder
Shareable LinksShare the Base64 string. (Limit: 10KB)
Who is this for?
Web Performance
Inlining small icons to reduce the number of server requests.
Data URIInline imagePerformance optimization
Email Signatures
Embedding a logo directly in an email signature so it doesn't get blocked by email clients.
Email logoOutlook signatureEmbedded image
Single File Apps
Creating self-contained HTML files that don't depend on external assets.
Offline appSingle filePortable HTML
How to Use
1
Upload your image.
2
The tool generates the Base64 string instantly.
3
Copy the string, or the ready-made HTML/CSS code.
Frequently Asked Questions
Does Base64 increase file size?
Yes, it makes the file about 33% bigger. It's best for tiny icons, not big photos.
When should I use Base64?
Use it for small logos or icons so your website doesn't have to make a separate request to the server.
Is it secure?
Yes. I encode everything locally on your device.
What formats are supported?
I can handle anything! JPG, PNG, GIF, SVG, WebP... you name it.
Can I decode Base64 back to an image?
Yes! Just paste the string into your browser's address bar (with 'data:image...') and it will show up.
Does it work with SVG?
Yes! Converting SVG to Base64 is a pro move for using vector icons in CSS background images.
Is there a size limit?
No hard limit, but if you try to encode a 10MB photo, your browser might freeze for a second.
