Work · alternatives · 2026

24 alternatives to duo·reader— split view for long docs

Two independent views of the same PDF. Nothing to install.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
ReadHere▲146
Lightweight PDF & EPUB reader in your browser
Jun 2026 · readhere.app · its alternatives →
2
Readwise Reader, an all-in-one reading app▲326
Hey HN, cofounder of Readwise here. We've been working on this cross-platform reader app for about 2 years, excited to finally share it in public beta. Probably the most notable thing that makes Reader unique is that it supports almost any content type you could want to save/read/highlight: * web pages * emails/newsletters * PDFs * ePubs * twitter threads * youtube videos (with transcripts) * RSS feeds With all of your knowledge content in one place, we built powerful reading and highlighting, as well as a bunch of novel triage/organization features, so you can actually…
2022 · readwise.io · its alternatives →
3
Readwise Reader▲380
The all-in-one reading app for power readers
2022 · readwise.io · its alternatives →
4
2Read ▲267
AI Kindle Reading Buddy
2025 · 2read.app · its alternatives →
5
Reader Mode 2.0▲332
Read, highlight and annotate the web without distractions
2025 · readermode.io · its alternatives →
6
Google Docs SplitView▲110
Open Docs, Sheets & Slides side-by-side in a single tab
2024 · chromewebstore.google.com · its alternatives →
7
Splitto▲105
Split any PDF into Color & Grayscale
2024 · splitto.app · its alternatives →
8
Book2SocialFeed▲130
Turn pdfs into social media-like posts
2024 · github.com · its alternatives →
9
Split PDF▲74
Split PDFs & save separate PDF files online for free
2023 · onepdf.online · its alternatives →
10
Kdan Mobile PDF Reader▲97
PDF editor designed for all the ways you work
2020 · pdf-reader.kdandoc.com · its alternatives →
11
Duo▲72
Dual-paned web browser for responsive web design.
2013 · apps.apple.com · its alternatives →
12
Pdf.js-based real-time collaborative viewer for Chrome▲61
2014 · chrome.google.com · its alternatives →
13
SimplePDFReader▲36
Conveniently find, navigate and read PDFs on your phone
2024 · play.google.com · its alternatives →
14
PDF Stitch▲9
Merge, rearrange, and organize documents, completely offline
Nov 2025 · pdf-stitch.ogwenya.dev · its alternatives →
15
Side Reader▲8
Side Reader is a Chrome extension that lets you read and interact with PDFs directly on ChatGPT, Claude, and DeepSeek websites. I built Side Reader because I got tired of the constant tab-switching between PDF readers and AI chat - copying text, switching tabs, pasting, repeat. It was driving me crazy. Over time, I added more features like custom highlight buttons, screenshot functionality, and local storage.
2025 · side-reader.com · its alternatives →
16
PDF Reader Pro▲10
View, edit, convert , merge, split, extract, compress PDF
2022 · pdfreaderpro.com · its alternatives →
17
PDF Merge Buddy▲5
Finally, PDF merges done right!
Nov 2025 · pdfmergebuddy.com · its alternatives →
18
WekApps PDF Merge & Split Pro▲5
Free merge and/or split your PDF documents without limits.
2021 · wekapps.com · its alternatives →
19
COMBINE PDF▲12
Merge pdf files instantly — private & offline
2025 · ilovepdf.sbs · its alternatives →
20
FRACTO▲3
Read Faster.
Jan 2026 · fracto.dev · its alternatives →
21
PDF Wall▲7
Pdf tool
Oct 2025 · pdf.wall-spot.com · its alternatives →
22
Merge PDF Securely▲10
Merge PDFs in your browser — fast, private, and secure
2025 · mergepdfsecurely.com · its alternatives →
23
PDF Mate▲2
Free PDF toolkit that works entirely offline.
Apr 2026 · m9ai.work · its alternatives →
24
Parallèle Reader▲5
Read books in two languages, side by side, fully offline
Jul 2026 · apps.apple.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →