// a sandbox of 376 sharp tools
QR, barcodes, bcrypt hashes for PHP, UUIDs, JWT decoders, color palettes — fast, local, no signup. Search the sandbox and start.
Design · tool
Pure-CSS hover tooltips in any position with live preview.
.tooltip { position: relative; display: inline-block; }
.tooltip::after {
content: attr(data-tip);
position: absolute;
bottom: 125%; left: 50%; transform: translateX(-50%);
padding: 6px 10px;
border-radius: 6px;
background: #1f2937;
color: #ffffff;
font-size: 12px;
white-space: nowrap;
opacity: 0;
pointer-events: none;
transition: opacity .18s ease;
}
.tooltip:hover::after { opacity: 1; }// about the sandbox
Most tools process their inputs in your browser. Tools that look up exchange rates, network details or word suggestions use external services; speech features can depend on your browser's services. Each tool's guide explains its purpose and practical limitations.