A History of the Pixel

Thirty-five years of the web's smallest meaningful unit — and the domain it's named after.

  1. 1989

    The Memo

    At CERN, Tim Berners-Lee submits a proposal titled Information Management: A Proposal. It describes a system of linked documents — a "web" of information. His boss pencils three words on the first page.

    "Vague but exciting..."
    — Mike Sendall's margin note on the proposal
  2. 1993

    Images Arrive

    Marc Andreessen ships Mosaic 1.0. He and Eric Bina propose the <img> tag on www-talk. For the first time, the pixel becomes part of the web — and designers start asking for layout control HTML doesn't offer.

    <img src="ncsa.gif" width="88" height="31">
  3. 1995

    The Spacer Arrives

    David Siegel's book Creating Killer Web Sites popularizes the 1×1 transparent GIF as a layout tool. For the next decade, spacer.gif is the most-requested image on the web — referenced hundreds of times per page.

  4. 1996

    CSS Is Born

    Håkon Wium Lie and Bert Bos publish CSS Level 1 as a W3C recommendation. The px unit is formally defined as an angular measurement — not a hardware pixel. Browser support will take years.

    body { font-family: sans-serif; }
  5. 2000

    Peak Spacer

    At the dot-com peak, the largest websites on Earth — Yahoo, MSN, AOL — render their layouts with nested tables and 1×1 transparent GIFs. The same 43-byte file is cached in every browser under many names.

    • spacer.gif
    • pixel.gif
    • clear.gif
    • shim.gif
    • blank.gif
  6. 2002

    A Domain Is Born

    On May 4, 1px.com is registered. At this moment, the top 1,000 websites on Earth still render their layouts with tables and transparent pixels. The era the domain lives in is written into its name.

    Domain:1px.com
    Created:2002-05-04
    Status:available
  7. 2003

    Standards Strike Back

    Jeffrey Zeldman publishes Designing with Web Standards. It argues that the layout hacks of the table era were a historical necessity — and that the time has come to leave them behind. CSS-based layout goes mainstream.

    <!DOCTYPE html PUBLIC
      "-//W3C//DTD XHTML 1.0 Strict"...>
  8. 2005

    Floats Take Over

    Browser support for CSS is finally mature enough. Tables give way to floats. The spacer GIF — after ten years of service — quietly disappears from new sites. Most designers never notice its absence.

    .sidebar { float: left; width: 240px; }
  9. 2010

    1 ≠ 1

    Steve Jobs unveils the iPhone 4 Retina display on June 7. On a mainstream device for the first time, 1 CSS pixel no longer equals 1 hardware pixel. The same month, Ethan Marcotte coins Responsive Web Design.

    1×
    2×
    3×
    Same 1px border at three pixel ratios.
  10. 2012

    Retina Reaches Desktop

    The Retina MacBook Pro ships with a 2880×1800 display. The hairline border problem — previously confined to mobile — arrives on every designer's desk. CSS 0.5px enters the vocabulary.

    2880 × 1800
    pixels in a 15.4-inch panel
  11. 2014

    Three Times Density

    The iPhone 6 Plus introduces 3× displays. Borders must now survive not just 1× and 2×, but 3× and the fractional scaling between them. The word hairline becomes design-system vocabulary.

    @1x @2x @3x
  12. 2017

    Grid Ships

    CSS Grid lands in every major browser within weeks of each other. For the first time in web history, the platform's layout primitives are sufficient. Tables, floats, and flex hacks recede into legend.

    display: grid;
    grid-template-columns: 1fr 2fr;
  13. 2020

    The Viewport Gets Honest

    The CSS working group introduces dvh, svh, and lvh — viewport units that account for mobile browser chrome. The fundamental unit is still the pixel, but it now understands dynamic contexts.

    dvh svh lvh
  14. 2024

    Still 1px

    Large language models generate UI from text. Design tools export production code. And yet, thirty-five years in, the smallest meaningful unit of a web layout is still the pixel. The era that 1px.com was registered in never ended.

    1px.com
    22 years old. Still defining the unit.

A piece of web archaeology

1px.com was registered in the middle of the spacer.gif era. It has been continuously owned for more than two decades, through every shift on this timeline. That history is part of what makes it a premium domain.