Norkta

Invert.
Merge.
Extract.

PDF tools for
Mac and iPhone.

Invert colors, merge files, compress documents, and extract text.

Get Norkta

Device

01 / Invert

Read PDFs in darker colors.

Norkta on Mac: the original Brownian Motion PDF beside its dark version, with blue formulas and colored graphs preserved. — View full size View full size

Norkta on iPhone showing the inverted Brownian Motion PDF in B&W mode. — View full size View full size

02 / Merge

Bring your PDFs together.

Norkta on Mac: Brownian Motion and Markov Chains in the input list, with their merged PDF on the right. — View full size View full size

Norkta on iPhone previewing the combined PDF with the result 2 PDFs merged. — View full size View full size

03 / Compress

Make large PDFs smaller.

Norkta on Mac comparing the original and compressed PDF. This sample goes from 314 KB to 244 KB, a 22 percent reduction. — View full size View full size

Norkta on iPhone with Balanced compression selected. This sample goes from 314 KB to 241 KB, a 23 percent reduction. — View full size View full size

04 / Extract

Copy text from the page.

Norkta on Mac showing the Markov Chains PDF beside its extracted text and Copy button. — View full size View full size

Norkta on iPhone showing 976 characters extracted from Markov Chains, ready to copy. — View full size View full size

Your documents stay on your device.

How Norkta handles your files