Image to Base64
Convert images to Base64 data URIs
Upload Image
Drop an image here or click to select
Batch upload supported
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Base64 Encoder / Decoder
Quickly encode text to Base64 or decode Base64 back to text.
How to Use
Upload Your File
Drag and drop your file or click to browse. Your file stays in your browser.
Adjust Settings
Configure options to get exactly the result you need.
Download Result
Process and download your file instantly — no waiting, no server upload.
Why Use This Tool
100% Free
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No Installation
Runs entirely in your browser. No software to download or install.
Private & Secure
Your data never leaves your device. Nothing is uploaded to any server.
Works on Mobile
Fully responsive — use on your phone, tablet, or desktop.
Your Files Stay Private
This tool processes your files entirely in your browser. Nothing is uploaded to any server — your data never leaves your device.
- No server upload — 100% client-side processing
- No data stored — files are discarded when you close the tab
- No account required — use instantly without signing up
Image to Base64: Encode Images as Text for Web Development
Key Points
- Base64 encodes binary image data as ASCII text, embeddable directly in HTML and CSS
- Eliminates extra HTTP requests—ideal for small icons, logos, and UI elements
- Base64 increases data size by approximately 33%, so it's best for images under 10 KB
Base64 encoding converts image files into text strings that can be embedded directly in HTML, CSS, or JavaScript. This technique eliminates separate HTTP requests for small images, reducing page load latency. It's a standard practice in web development for inline icons, email templates, and single-file applications.
33%
Size increase from Base64 encoding
Key Concepts
Data URIs
Base64 images use data URI format: data:image/png;base64,iVBOR... This self-contained string can replace any image URL in HTML src attributes or CSS background properties.
Inline vs External Images
Each external image requires a separate HTTP request. For small images (under 10 KB), the overhead of the request itself can exceed the image size. Inlining via Base64 eliminates this overhead.
Size Trade-off
Base64 encoding increases data size by approximately 33%. A 6 KB image becomes 8 KB as Base64. For small assets this is acceptable; for large images, external files are more efficient.
Email HTML Templates
Many email clients block external images by default. Base64-embedded images display immediately without requiring the recipient to 'load images,' making them reliable for email signatures and newsletters.
Best Practices
Only Base64-encode images under 10 KB—larger images are more efficient as separate files with browser caching.
Use Base64 for critical above-the-fold icons and logos that must appear instantly without extra network requests.
In CSS, embed Base64 images as background-image data URIs to reduce render-blocking requests.
For React/Next.js projects, import small images directly—the bundler automatically inlines them as Base64 when under the size threshold.
All encoding happens locally in your browser. No images are uploaded to any server. The generated Base64 string contains the complete image data.