Hex Shorthand Expander
Expand #abc into #aabbcc and validate quick CSS color snippets.
Expand shorthand hex colors
CSS allows three-digit hex colors like #abc as shorthand for #aabbcc, which is convenient to write but harder to work with when you need the full form for a tool or a calculation. This expander converts shorthand to full six-digit hex and validates the input along the way.
Getting the canonical form matters when comparing colors, feeding them to a converter, or storing them consistently. Paste a shorthand hex to expand it, and get a quick check that the value is actually valid CSS color syntax.
Accurate and private
Everything runs locally in your browser using standard web APIs — nothing is uploaded, logged, or stored on any server — so the tool works offline, responds instantly, and keeps whatever you paste in on your own device. That makes it safe to use even for confidential, client, or internal data you would never send to an unknown website.
Frequently Asked Questions
What does the hex shorthand expander do?
It expands valid three-digit hex colors into six-digit CSS hex colors and previews them.
Can I use the output in production?
Yes. Review the generated values, then copy the CSS, color list, or text output into your design system or project files.
Does this upload my colors or images?
No. The tool runs in your browser. Uploaded images are read locally and are not sent to a server.
Is this tool free?
Yes. It is free to use and does not require an account.
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