Redline 1.8

Redline 1.8: open PDFs straight from Explorer and Finder.

Download

• Windows 10 and 11: Redline-Windows.exe. Open it; it installs in a few seconds, no administrator password needed. If Windows says "Windows protected your PC", click More info → Run anyway (the installer isn't code-signed yet).
• Mac (macOS 12 or newer): Redline-Mac.dmg for Apple-chip Macs, Redline-Mac-Intel.dmg for Intel Macs. Drag Redline to Applications. The first time, if your Mac says it "could not verify" Redline, open System Settings ▸ Privacy & Security ▸ Open Anyway (the app isn't notarized yet).

New

• Open with ▸ Redline and double-click: Redline is listed for PDFs in Explorer and Finder (to make it the default, pick it in Open with ▸ Choose another app and tick Always). Save writes straight back into the file you opened.
• One window: PDFs you open while Redline is running come up as tabs in the window you already have; opening a file that's already open shows its tab.
• Works with files on network drives and in deep project folders (paths longer than 260 characters).
• Read-only and locked files are never overwritten: Redline says so, and Save As saves a copy.
• On a Mac, Finder tags and file permissions stay as they were after saving, and shortcuts are shown the Mac way (⌘, ⇧, ⌥).

Fixed

• Go to Page (Ctrl+Alt+G, ⌥⌘G on a Mac) found the next search result instead.
• Zooming in and out on dense sets no longer stalls.

Redline is free, with no ads and no subscription. If it saves you time, donate.

Redline 1.7.1

Redline 1.7.1: smoother zooming.

• Zooming in and out on big, dense plan sets no longer stutters. Pauses of up to 0.8 s while zooming are gone (the worst left is under 0.2 s, once zooming stops).

Download

• Windows 10 and 11: Redline-Windows.exe. If Windows says "Windows protected your PC", click More info → Run anyway (the installer isn't code-signed yet).
• Mac (macOS 12 or newer): Redline-Mac.dmg for Apple-chip Macs, Redline-Mac-Intel.dmg for Intel Macs. Drag Redline to Applications. The first time, if your Mac says it "could not verify" Redline, open System Settings ▸ Privacy & Security ▸ Open Anyway.

Found a bug or want a feature? Click Donate / Improve in Redline, or email feedback@aicodeforge.dev. Redline is free; if it saves you time, donate.

Redline 1.7

Redline 1.7: the first public release.

Download

• Windows 10 and 11: Redline-Windows.exe. Open it; it installs in a few seconds, no administrator password needed. If Windows says "Windows protected your PC", click More info → Run anyway (the installer isn't code-signed yet).
• Mac (macOS 12 or newer): Redline-Mac.dmg for Apple-chip Macs, Redline-Mac-Intel.dmg for Intel Macs. Drag Redline to Applications. The first time, if your Mac says it "could not verify" Redline, open System Settings ▸ Privacy & Security ▸ Open Anyway (the app isn't notarized yet).

What's in it

• Clouds, arrows, callouts, stamps and highlights; measuring at the drawing's scale; counting symbols.
• Forms, merge, split, redact and sign; text recognition for scanned sheets.
• Fast scrolling, page flips and zoom on big plan sets (pages drawn with PDFium).
• Donate / Improve at the top right: Report a Bug, Request a Feature, or email feedback@aicodeforge.dev.

Redline is free, with no ads and no subscription. If it saves you time, donate.