The PDF reader made for scientific papers.

02  Peek

Peek at any link without losing your place.

A link to an equation, figure, section or citation opens in a panel below, its target marked. Your page stays where it is.

⌘/Ctrl + click a link to peek

03  Copy

Select by formula, copy as LaTeX.

The selection follows the formula's structure: drag into a fraction or a bracket and it is taken whole.

Copy, and you get LaTeX, ready for your notes or your next paper.

05  Any journal

Works with every journal.

Whoever the publisher, Epsilon understands the paper and works for you.

  • arXiv
  • Springer
  • Elsevier
  • Physical ReviewAPS
  • JHEP
  • Hindawi
  • Chinese Physics C
  • CambridgeUniversity Press
  • and more

And the rest

Everything you expect from a PDF reader.

  • Any PDF

    On the web or on your computer.

  • Highlight

    Mark the passages that matter.

  • Add text

    Type anywhere on the page.

  • Draw

    Freehand, on any page.

  • Sign

    Type, draw or upload your signature.

  • Fill in forms

    Right in the viewer.

  • Print and save

    Print it, or save a copy.

  • Presentation mode

    Full screen, page by page.

  • Your look

    Epsilon's or Chrome's, in light or dark.

Private by design

Your papers stay with you.

  • Formulas read locally
  • No account
  • No analytics in the extension
  • The extension sends nothing anywhere
Privacy policy

What's new

Every journal's math, read as it is set.

Version 1.4.5

All release notes
  • New in 1.4.5: fraction bars, roots and overlines read by the fonts' own layout rules, about 20% fewer equations missed. APS journals and matplotlib figure labels read as they are set, and equations with words in them read whole.
  • Accents and bars over letters read right in more fonts, and accented words copy as they read (Kähler). Books get their chapters in the outline, and a figure link opens with the whole figure in view.
  • In 1.4.4, text selects as in Chrome, and Epsilon steps in only at formulas. Displays with words read whole, and older plain TeX papers read better.
  • In 1.4.3, papers without links get them: sections, equations, figures, citations and the contents. Click to go there, Cmd or Ctrl+click to peek.
  • Papers without an outline get one from their numbered headings, and the tab shows the paper's title.
  • Cases, wide accents and integral limits read right, so almost every copy compiles. Earlier, in 1.4.2: copy part of a matrix, and every standard symbol read as its LaTeX command.
  • In 1.4 and 1.4.1: select by formula, what you see selected is what is copied; a triple click on a formula takes the whole formula.

Read your next paper in Epsilon.