Hypothesis - Web & PDF Annotation

CRX ID
bjfhmglciegochdpefhhlphglcehbmek
Status
Live on Store
Description from extension meta

Collaboratively annotate, highlight, and tag web pages and PDF documents.

Image from store
Hypothesis - Web & PDF Annotation
Description from store

Use Hypothesis to hold discussions, read socially, organize your research, and take personal notes on webpages, PDFs and EPUBs.

Latest reviews

Anirudra Gc 2025-08-16

Have not tried it on PDFs, but works great on Websites. No complaints here. Amazing extension, does what it claims to do.

Ahmed Taboubi 2025-08-08

very bad

Abby Graham 2024-05-23

I really enjoy the this extension, it's very useful and easy to use. My only issue is it's a little buggy. Whenever I click into a different tab and return to the pdf, the pdf doesn't load but only on pages I've highlighted. Occasionally, the highlight/annotate buttons will stop appearing when I select a sentence. The only way to fix this, that I've found, is to fully close the pdf tab, and return to the original website that I accessed the pdf on, and load it up again. Ultimately, I really like the extension but it needs to some kinks worked out!

Jonathan - I AM 2024-05-11

Hypothesis is a very useful system/service for highlighting and annotating webpages and PDFs. The extension itself could do with some refinements. It would be great to have a way to activate it for all webpages (a mode in which it's just ON during entire browsing session, or until manually turned OFF again). Currently I have to turn it on for every page, which is a bit tedious when doing a lot of research with potentially tens or hundreds of tabs.

Dan Nichols 2024-05-11

Fantastic but wished it stayed active or automatically activated on every page. Rather inconvenient to activate on every single instance desired.

Bond Sun 2024-02-28

This is very usefull extension, thanks a lot! By the way, why it logs me out after some time? Any way to keep signed in?

Lakshya Dugar 2024-02-01

very useful extension

Jen Hardesty 2023-12-27

Chrome extension never completes log in. Can't use it.

Gabrielle 2023-12-15

wow that's perfect

Adriana Talhero 2023-11-15

"hypothes.is precisa revisar a segurança da sua conexão antes de prosseguir"... e já faz 5 horas

Emma O 2023-11-04

Useless social media-ized antonation tool. You literally cannot even antonate or highligth local files without creating an account. Dev needs to clearly state their niche on app page, because this was a waste of 20 mins of my life

Emma O 2023-11-04

Useless social media-ized antonation tool. You literally cannot even antonate or highligth local files without creating an account. Dev needs to clearly state their niche on app page, because this was a waste of 20 mins of my life

Yusuf Umac 2023-09-10

Great app but my chrome extension keeps logging out way too frequently somehow. Every time I want to add a bookmark, I've to go through the singin flow again which is really frustrating. I've added the exception to allow cookies from the extension as well but using an add blocker, maybe that's why.

Yusuf Umac 2023-09-10

Great app but my chrome extension keeps logging out way too frequently somehow. Every time I want to add a bookmark, I've to go through the singin flow again which is really frustrating. I've added the exception to allow cookies from the extension as well but using an add blocker, maybe that's why.

eric ingerson 2023-09-04

This is a "social" annotation tool. Which is a weird thing. It makes your annotations public (for some reason) by default and accidental clicks show you every other user's annotations (for some reason). Collaboration makes sense, but this vast social media approach is bizarre and distracting, and it seems this is mostly a social media ap for discussing articles with every other user. The steps to make things private are unintuitive and awkward, and the labels in this regard are contradictory (eg your annotation will say "public" but with a lock icon, which means it's in a public sphere, but locked from view. Disconcerting.) There are other similar aps without the social media aspect whose features are similar.

eric ingerson 2023-09-04

This is a "social" annotation tool. Which is a weird thing. It makes your annotations public (for some reason) by default and accidental clicks show you every other user's annotations (for some reason). Collaboration makes sense, but this vast social media approach is bizarre and distracting, and it seems this is mostly a social media ap for discussing articles with every other user. The steps to make things private are unintuitive and awkward, and the labels in this regard are contradictory (eg your annotation will say "public" but with a lock icon, which means it's in a public sphere, but locked from view. Disconcerting.) There are other similar aps without the social media aspect whose features are similar.

melissa flores 2023-05-02

I wish it had a underlining feature, because personally for me underlining and highlighting are two different methods of annotating for me so i think it'll be a perfect addition to the extension

melissa flores 2023-05-02

I wish it had a underlining feature, because personally for me underlining and highlighting are two different methods of annotating for me so i think it'll be a perfect addition to the extension

S J 2023-04-07

Updated review: From 3 stars to 1. DO NOT USE. I spent HOURS going through and making notes on dozens of pages (an annoying, inefficient process as detailed below) yesterday, only to go back to it today, without even having closed the browser or the tabs in the meantime, and ALL but ONE page has lost the annotations. If I search for them, or for any done by me, it's the only one that comes up. So HOURS of work gone. This "service" is garbage and should NOT be used. Consider yourself warned. It's nice being able to annotate, but has issues. Can't set to always show notes (have to either leave the sidebar open or manually open it each time, instead of being able to keep note visible in corner), constantly having to log back in, which is both annoying and can cause issues, have to manually enable it on each and every page, even within the same site, and after having to log back in this last time every time I tried creating an annotation it would increment the counter number but not let me type anything, until I refreshed the page. Also, it reverts back to public instead of staying on private as set (or allowing a default to be set). Much potential brought down by poor design and possible bugs.

S J 2023-04-07

Updated review: From 3 stars to 1. DO NOT USE. I spent HOURS going through and making notes on dozens of pages (an annoying, inefficient process as detailed below) yesterday, only to go back to it today, without even having closed the browser or the tabs in the meantime, and ALL but ONE page has lost the annotations. If I search for them, or for any done by me, it's the only one that comes up. So HOURS of work gone. This "service" is garbage and should NOT be used. Consider yourself warned. It's nice being able to annotate, but has issues. Can't set to always show notes (have to either leave the sidebar open or manually open it each time, instead of being able to keep note visible in corner), constantly having to log back in, which is both annoying and can cause issues, have to manually enable it on each and every page, even within the same site, and after having to log back in this last time every time I tried creating an annotation it would increment the counter number but not let me type anything, until I refreshed the page. Also, it reverts back to public instead of staying on private as set (or allowing a default to be set). Much potential brought down by poor design and possible bugs.

Knee Kab 2023-03-18

I tried and used hypothes.is a year or two ago (along with every other note taking \ pkm \ bookmark tool \ extension in the world ... i finally gave up and went to (try to) use worldbrain Memex and then Obsidian, and then, frankly gave up, and just used OneTab. Lately i started trying to come up with "a plan" again. Memex with Logseq, sorted and organized tab groups to Tab++ and whole sessions saves to OneTab ... the bulk of it happens between Memex and Logseq. Memex recently went paid (for more than 50 uses per month) so i went back to searching. Tried this again. Its MUCH better now. Feels smoother, tighter, more in the right place stuff, less in the wrong place. Great features. Private notes (finally?) ... integrates with Logseq. Will be using this and Logseq now, with tabmanager back ups just to be safe. But a FULL TEXT SEARCHABLE annotation (and defacto bookmark) service with a graph capable PKM (logseq) is THE TICKET. If Hypothes.is ever beefs up their note taking capabilities, it will be untouchable. HELL YEAH!

Knee Kab 2023-03-18

I tried and used hypothes.is a year or two ago (along with every other note taking \ pkm \ bookmark tool \ extension in the world ... i finally gave up and went to (try to) use worldbrain Memex and then Obsidian, and then, frankly gave up, and just used OneTab. Lately i started trying to come up with "a plan" again. Memex with Logseq, sorted and organized tab groups to Tab++ and whole sessions saves to OneTab ... the bulk of it happens between Memex and Logseq. Memex recently went paid (for more than 50 uses per month) so i went back to searching. Tried this again. Its MUCH better now. Feels smoother, tighter, more in the right place stuff, less in the wrong place. Great features. Private notes (finally?) ... integrates with Logseq. Will be using this and Logseq now, with tabmanager back ups just to be safe. But a FULL TEXT SEARCHABLE annotation (and defacto bookmark) service with a graph capable PKM (logseq) is THE TICKET. If Hypothes.is ever beefs up their note taking capabilities, it will be untouchable. HELL YEAH!

Adam Tompline 2023-03-17

This extension does one extra thing that other extensions doesn't. The option to temporarily hide all the annotations/highlights on the page. I don't know why other extensions overlooked this simple to implement feature. Thanks for this feature. Improvements: More variations of color. Its a bit bland right now.

Adam Tompline 2023-03-17

This extension does one extra thing that other extensions doesn't. The option to temporarily hide all the annotations/highlights on the page. I don't know why other extensions overlooked this simple to implement feature. Thanks for this feature. Improvements: More variations of color. Its a bit bland right now.

Krzysztof Płocharz 2023-01-28

Keeps logging out. After each refresh of page I have to login again. After logging in I have to change "group".

Krzysztof Płocharz 2023-01-28

Keeps logging out. After each refresh of page I have to login again. After logging in I have to change "group".

Laurent 2022-12-06

Cannot use it without signing up

Laurent 2022-12-06

Cannot use it without signing up

Tobi 2022-11-14

Conusing, not intuitive, awkward.

Tobi 2022-11-14

Conusing, not intuitive, awkward.

Mikel Butterfield 2022-11-14

Cannot comment without sign up... 1 star.

Mikel Butterfield 2022-11-14

Cannot comment without sign up... 1 star.

Angel Heart 2022-08-30

If I say it's a good extension, it would not be a appropriate review. It's a legendary extension with amazing features! <3

Angel Heart 2022-08-30

If I say it's a good extension, it would not be a appropriate review. It's a legendary extension with amazing features! <3

Daniel R 2022-07-11

I love it, but it's really really really annoying how every time I try to use it, I need to log in again.

Daniel R 2022-07-11

I love it, but it's really really really annoying how every time I try to use it, I need to log in again.

Bram Dg 2022-06-15

Want to love it, but really need ~4 colors. Core functionality for me.

Bram Dg 2022-06-15

Want to love it, but really need ~4 colors. Core functionality for me.

Kelechi Mba 2022-06-12

I was going to use this extension for one purpose which was to annotate PDFs, but my browser (Vivaldi) wouldn't allow it, which is a shame. It would have been perfect for me if a lot of browsers could have access to this extension.

Kelechi Mba 2022-06-12

I was going to use this extension for one purpose which was to annotate PDFs, but my browser (Vivaldi) wouldn't allow it, which is a shame. It would have been perfect for me if a lot of browsers could have access to this extension.

eatcosmos 2022-05-21

非常伟大的理想实践者

Bevis Zhao 2022-05-06

It's a good tool, obviously, especially it's free. Thank you! But I still need two more features, please consider: 1. Support the original format, e.g. bold, newline, list, etc. 2. Automatically highlight the lines after openning a page, and without showing the drawer.

Bevis Zhao 2022-05-06

It's a good tool, obviously, especially it's free. Thank you! But I still need two more features, please consider: 1. Support the original format, e.g. bold, newline, list, etc. 2. Automatically highlight the lines after openning a page, and without showing the drawer.

Madame Minty 2022-04-10

Might be best there is for collaboration. Wish it had more colors and more visible annotations (text on hover? anything, really). It would be nice if it had some sort of local storage cache, so it doesn't take 5 seconds to load what I just annotated.

Madame Minty 2022-04-10

Might be best there is for collaboration. Wish it had more colors and more visible annotations (text on hover? anything, really). It would be nice if it had some sort of local storage cache, so it doesn't take 5 seconds to load what I just annotated.

Sanjida Shaheed 2022-04-06

Love it! Works like a dream, ma shaa Allah. Is there a way to change the highlight colour? Also, I would like to be able to move an annotation from one group tp another when needed for better organization. Please let me know how to achieve this.

Sanjida Shaheed 2022-04-06

Love it! Works like a dream, ma shaa Allah. Is there a way to change the highlight colour? Also, I would like to be able to move an annotation from one group tp another when needed for better organization. Please let me know how to achieve this.

ri sheng 2022-03-17

非常有用,只是在批量处理上面差了一点...

ling song 2022-03-09

nice

ling song 2022-03-09

nice

Statistics

Installs
300,000
Market
Chrome Web Store
Rating
4.1 (222 votes)
Last update
2025-09-17
Version 1.1696.0.0 (Official Build)
Languages