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// a sandbox of 169 sharp tools

Every little generator
you keep googling for.

QR, barcodes, bcrypt hashes for PHP, UUIDs, JWT decoders, color palettes — fast, local, no signup. Search the sandbox and start.

Responsive Image srcset

Developer · tool

Responsive Image srcset

Responsive <img> srcset and sizes markup.

<picture>
  <source type="image/webp" sizes="(max-width: 768px) 100vw, 50vw"
          srcset="/images/hero-480.webp 480w,
              /images/hero-768.webp 768w,
              /images/hero-1024.webp 1024w,
              /images/hero-1440.webp 1440w,
              /images/hero-1920.webp 1920w">
  <img src="/images/hero-1920.jpg"
       srcset="/images/hero-480.jpg 480w,
              /images/hero-768.jpg 768w,
              /images/hero-1024.jpg 1024w,
              /images/hero-1440.jpg 1440w,
              /images/hero-1920.jpg 1920w"
       sizes="(max-width: 768px) 100vw, 50vw"
       alt="Mountain landscape at sunrise"
       width="1920" loading="lazy" decoding="async">
</picture>

// about the sandbox

The small utilities you need,
without the ad-walls.

Every generator runs entirely in your browser. Your inputs never leave the page — no servers, no logging, no tracking pixels. Open the tool, get the thing, close the tab.

  • 100%client-side
  • 0accounts
  • 169sharp tools
  • ∞free forever