Blurred Image Date Uri Generator
Fast, accurate and free online blurred image date uri generator tool running directly in your browser.
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1Enter data
Enter content, paste text or load a file from disk. -
2Click the button
The tool will immediately process your data in the browser. -
3Get the result
Copy the finished text or save the file to your device.
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Other tools you may find usefulData URI blur placeholder generator for
pages Blur placeholders improve UX by displaying a low-quality version when loading the actual image. LQIP (Low Quality Image Placeholder) and Data URI (base64 inline) techniques eliminate additional HTTP requests and accelerated perceived performance.
What is Data URI and LQIP
Data URI: encoded file directly in the URL. Format: data:[mediatype][;base64],. Example: data:image/png;base64,iVBORw0K... LQIP (Low Quality Image Placeholder): very small (10-30px) version of the image encoded as base64. Size: 300-800 bytes vs MB of the actual image. Advantage: immediate display, then animated blur while HD is loading.
Placeholder techniques for images
LQIP: small image base64 + CSS blur (filter: blur(20px)). BlurHash: Wolt algorithm (compact representation 20-30 characters, decodes to color blur). ThumbHash: newer, better colors. SVG placeholder: colorful shapes. Dominant color: one background color from the image. Progressive JPEG: Loads from blurry to sharp. Skeleton screens: gray rectangles.
Data URI in HTML and CSS
HTML:
. CSS: background-image: url("data:image/png;base64,..."). Disadvantages: not cached separately by the browser. Increases the size of HTML/CSS. Good for: small icons, placeholder. SVG Data URI: data:image/svg+xml,
Lazy loading implementation with blur
HTML:
. CSS: .blur-up { filter: blur(20px); transition: filter 0.4s; } .blur-up.loaded { filter: none; }. JavaScript (IntersectionObserver): when visible → load data-src → add loaded class. Libraries: lazysizes (automate), next/image (Next.js built-in blur placeholder).
FAQ
How to generate Data URI from image in JavaScript?
canvas.toDataURL("image/png") or canvas.toDataURL("image/jpeg", 0.8). FileReader: reader.readAsDataURL(file). Reduce image: canvas 10×10px with drawImage → toDataURL → base64 placeholder. Node.js: sharp(image).resize(10).blur(5).toBuffer().then(buf => "data:image/png;base64," + buf.toString("base64")).
What is BlurHash and how to use it?
BlurHash: Wolt/Dag Ågren algorithm. Compresses the image into a string, e.g. "LEHV6nWB2yk8pyo0adR*.7kCMdnj". Decodes to color blur in JavaScript. Size: 20-30 characters vs LQIP base64 (300-800 B). Libraries: blurhash (npm), blurhash-wasm. Next.js: blurDataURL + placeholder="blur". Disadvantages: Requires JS to decode, no native browser.
How to check the size of a Data URI?
Base64 encodes 3 bytes → 4 ASCII characters (+33% overhead). Image 600B PNG → base64 approx. 800 characters. Check: atob("base64string").length (JavaScript). Optimize: Reduce source image size before base64. PNG vs JPEG: JPEG smaller for photos. WebP: even smaller. SVG: for geometric shapes smallest.
How does lazy loading affect Core Web Vitals?
LCP (Largest Contentful Paint): lazy loading hero image = bad LCP. No lazy-load above-the-fold images! loading="lazy" only for below-the-fold. FCP: blur placeholder accelerates perceived FCP. CLS: always specify width and height in img so that the browser reserves space. TBT: IntersectionObserver is async, it does not block the main thread.