What this tool does
BlurHash Generator creates compact placeholder strings from images for progressive image loading.
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🖼️ BlurHash Generator
Generate real BlurHash placeholders from images locally in your browser. Preview, tune components, and copy CSS snippets.
Original preview
Decoded placeholder
How to use this BlurHash
Use BlurHash when you want a tiny text placeholder that can render before the full image loads. More components preserve more detail but create longer hashes. Most thumbnails work well with 4 × 3 or 4 × 4.
This browser version downsamples the image before encoding for speed and privacy. Very large images may be slower depending on device memory.
Why it is useful
It helps developers show lightweight blurred previews while real images load in apps, galleries, and content feeds.
How it works
The browser samples the selected image and encodes a small visual approximation into a BlurHash string.
Best input
Use the same image or crop that will be displayed in production.
Performance tip
BlurHash placeholders are useful for perceived speed, but still optimize the final image size and format.
Privacy note
Image processing is designed to happen locally in your browser.
Important limitation
BlurHash is an approximation and may not preserve important detail, text, faces, or brand-sensitive colors exactly.
Quick answers
Is BlurHash the image?
No. It is a tiny encoded placeholder preview.
Can it replace thumbnails?
Usually no. It complements real thumbnails or optimized images.
Common Use Cases
Create tiny image placeholders
Generate compact placeholder strings for image-heavy pages, galleries, cards, and feeds.
Preview loading states before implementation
Tune component counts and compare the original image against the decoded placeholder.
Keep image processing local
Encode uploaded images in the browser without sending private assets to a server.