Blue Crab
Blue Crab
5.1.2

3.3

Blue Crab free download for Mac

Blue Crab

5.1.2
30 November 2016

Browse complete websites offline.

Overview

Blue Crab is a versatile and thorough program that you use to copy the contents of a Web site to your computer, in whole or in part, and then search or browse it offline.

Features:
  • Conduct fast offline browsing and searching without an Internet connection.
  • Perform batch downloads of URL's
  • Create a snapshot of a website for historical archiving.
  • Batch download Web archives.
  • Collect specific types of resources such as images or email addresses.
  • Search current content more thoroughly than a search engine right on your own computer.
  • Check a site for broken links, or generate an HTML sitemap
  • Create full page images of URL's (JPEG, BMP, TIFF, PNG, PSD, etc.)
  • Perform "Google Image Search" batch downloads: download images found using an image query on Google.

With Blue Crab you can download all the content including HTML, PDF, graphics, video, file archives, etc., or use selective filtering to restrict downloads to specific kinds of files. For example, you can choose to save only the JPEG images Blue Crab finds, or just the PDF's.

Blue Crab has a special feature called the "Media Grabber" which you can use to easily download just the images (or movies) on a Web site Moreover, you can view a slide show of the images as they are downloaded. You also have the option of "flattening" the images, i.e., putting them all into one folder, or preserving the folder structure on the server (just as when downloading a complete Web site for offline viewing.)

Blue Crab is always gentle on the server, processing only one URL at a time. (You can even make it pause between successive downloads so as to not overwhelm the server.)

The demo version you download now is fully functionaly and runs for about ten days.

Major Features:
  • Unique URL extraction algorithms yield very complete downloads compared to other products of this type.
  • You can download Web sites either for offline browsing, via re-linking of URL's, or to create virtual copies of them on your hard drive, i.e., backup a Web site as-is.
  • Supports both HTTP, HTTPS protocols as well as server realms. Detailed Grabber window shows server HTTP header response fields.
  • Optionally display Web pages as they are crawled using either your own Web browser or Blue Crabs own Web window.
  • You can restrict a crawl to just the initial domain, or allow the program to "stray" into offsite URL's
  • Blue Crab can remap "dynamic" URL's which contain path and search arguments so that resulting disk files are navigable offline.
  • Image URL's into JPEG files (or any other graphic file type supported by Quicktime) to create complete pictures of Web pages not possible simply by taking a single screen shot yourself.
  • Blue Crab provides its URL imaging ability as a service menu item available from other applications.
  • URL's can be imaged into files, or onto the clipboard.
  • Built-in directory search displays found files as a hierarchical list, with double-clickable entries.
  • A "batch window" enables you to download your own list of files. Simply drag and drop URL's into the batch window, or import them from an HTML file , or text file.
  • Grabbing in "images-only" mode just downloads image files, optionally "flattening" the results (i.e. putting all images into one folder.)
  • Reusable configuration settings control what is grabbed, saved or crawled:
  • Filter by size, date, file type or even content
  • Filter by filename, extension or path
  • Bookmarks window for storing frequently crawled Web sites
  • Supports form submissions to enable you to begin a crawl from a login page.
  • Supports cookies for more accurate downloads.
  • Generate site maps that consist of a hierarchical display of URL's Such maps can be optionally filtered by extension.
  • Find email addresses.
  • Customizable user-agent (spoofing) enables you to download Web sites which are platform specific.
  • Optionally receive email notifications of Blue Crab's progress during a lengthy crawl.
  • Dock badging provides visual feedback or progress when the program is in the background.
  • Google image search and download in batch.

Check the website for bundles and promos.

What's new in Blue Crab

Version 5.1.2:
  • Update for Mac OS 10.11
  • Fixed a bug opening the download directory from the grabber window (the 'Reveal' button), and similar problems with other convenience functions that open folders or files.
  • Fixed a bug that prevented the opening of the log file from the File menu, and similar problems with other instances for opening certain files.

24 Blue Crab Reviews

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Rate this app:

Jppagliaro
29 May 2007

Most helpful

Well, I don't consider your review "real" for a few reasons, which boil down to a sense of unfairness I have about it. I'll point out some of them: First of all your star rating is highly suspcious. For example, you give stability a 1 star rating yet didn't provide any examples of how the program is unstable. The other ratings also seem a bit harsh. I think that people who give 1 star overall ratings are likely being unfair. Then you list your problems with the program, the first of which was the startup window. Restricting demo programs in such ways is common practice, and I don't think it warrants mention in a "review." When real reviewers want to use the program I usually provide a free password so that the window isn't a usiance and they can conduct their experiements without the window displaying. You also don't point out what specific sites you had trouble with, at least in a personal email to me. If you had then I could at least determine if there is indeed a problem that needs to be addressed or not. I'm just curious about why you won't send me the URL of the websites that are causing you problems. Perhaps I can offer a suggestion on how to get it to work better on those sites, or resolve a possible bug in the program, if one exists. The web is a big place, and I know there are sites that don't work as well as others. But I find it hard to believe that Blue Crab doesn't do as well as others on your sites. And until you can prove me wrong I can't change my opinion on that. But if you can then I will openly admit I was wrong ;-) As for the sluggish text field, I do know that there was once an issue of that nature, fixed a long time ago. I'd like to know what version of Blue Crab you are using to be sure you have that fix, because I am not receiving problem reports from others of that nature. Finally, and most importantly, most real reviews provide the pros and cons of each program, not just the one they are seemingly trying to knock. It seems to me that your "review" is more of a means to another end.
Like (3)
Version 4.8.9
gordon-6
18 October 2017
I was looking at buying this until I discovered how slooow it is, and then I discovered these reviews...... so I am not alone in being ignored by BC support, Goodbye BC,
Like
Version 5.1.2
RJC.NJNYC
06 November 2014
AVOID. This developer is useless, as well as their website. I have their "Limit Point Software Utilities Bundle" where you get all of their apps with updates forever. Yeah, good luck. Anyone else having problems? Leave a comment, and maybe I'll start legal action to get them to honor their comments.
Like (2)
Version 5.0.07
4 answer(s)
Big77
Big77
02 February 2015
I contacted the developer a few times over the years about their products -- mainly to report bugs but most recently to ask how to upgrade to Blue Crab 5.1. Each time I got absolutely no response. Personally, I won't spend any more money on them since their support and attitude are lacking. It's not like I'm not willing to part with a few more dollars if that's what it takes to stay current (even though they promised I wouldn't have to) but their attitude is inexcusable.
Like (2)
Big77
Big77
19 February 2015
Looks like Blue Crab is now available for download from the Limit Point website. BUT the registration doesn't carry over automatically. So if you don't have the registration password saved someplace, open up your old Blue Crab, copy the registration password, then download the new Blue Crab, start it up and paste the registration password from the old one into the new. It works.
Like (3)
Gregm
Gregm
19 February 2015
The "problem" is communication. You do have the forever updates. Download the current whatever from the website (not the App Store) -- and guess what -- your forever PASSWORD is there, fully functional.
Like (1)
RJC.NJNYC
RJC.NJNYC
20 February 2015
Good News. Limited Points Software has finally come around for their customers. Their MacUpdate software description pages Download buttons now give you the software version described, instead of an earlier version, and their website has been greatly expanded and now also includes the latest software Downloads option, instead of just the Mac App Store option.
Like (2)
Fishscale
16 January 2014
I noticed that one time limit point apps that were released eons before the mac app store have suddenly all disappeared and 404 is now the response. I might have missed the obvious but with the new site layout it is pretty bare so I am completely confused as to the state of limit point customers that purchased software now only available via MAS. We get coupons, etc.. or what? I prefer a DL from the developer but better MAS than nothing which is the drift I am getting but keeping fingers crossed is not the case. So all of us that paid for the "bundle" of every app in existence now and to be released in the future by limit-point for one flat price is now in what state dev? Just very surprised for a developer I have always praised for their dedication to customer needs over developing multiple apps that are overall useful (like many MAS devs) - Hell the limit point utilities bundle + the other bigger apps is by far the best deal I have encountered, especially when those one trick utilities were the only way to get the task done and accessed via context menu before services. I'm going to email developer directly, always good communication so if they don't post a response here first I will let others know what the deal is, if any (most likely me just being tired or dev not finished with a site upgrade etc... ) ...
Like (3)
Version 5.0.06
1 answer(s)
Craig Paterson
Craig Paterson
03 May 2014
Did you ever contact the dev? Would be interested to know the outcome.
Like
ylluminate
16 February 2013
I don't know. I was hopeful that this would be snappier than SiteSucker, but I'm seeing about a 4 times speed difference on the favor of SiteSucker really outperforming this app and being more "mac-like". Additionally, I have to say that I'm not real keen on the features and the terminology used. It's not horrible, particularly for someone who knows what they're doing, but I could see someone getting lost pretty quickly on a few of the points and the initial delay of the tooltips.
Like
Version 5.0.06
Simbasounds
20 December 2012
I agree with some of the comments that this is the best web extractor. I tried them all on several occasions, and always came back to Blue Crab.
Like
Version 5.0.06
Sleav
10 December 2012
Blue Crab has proven to be the #1 software for grabbing up URL contents. The interface takes a bit of looking around, it is amazingly packed with features - but it's reliable and does exactly what it says it does, very fast. Best of all, Limit Point Software has been VERY responsive to any and all questions. If you're serious about web work, this software is the only way to go in this category, in my Humble Opinion...
Like
Version 5.0.06
L008com
03 April 2011
This is a very poor quality app. It has a lame java interface. It's very unintuitive. The app itself is slow and buddy. It just got 180 404 errors trying to download totally random URLs from my site, url's that are not linked to anywhere on my site. Clearly there are some big bugs in this app's code. I'll give it two stars because after fighting with it, it did download all, or at least most of my website. But this app is about what you'd expect for a windows app. I would not recommend it, even if it was free. For $25, forget it!
Like (3)
Version 5.0.01
2 answer(s)
Jppagliaro
Jppagliaro
20 May 2011
Hello, It is not a Windows app, it is a Mac app only,. It is not a Java interface. It is not written in Java. It is written in using standard Mac OS technology. 404 errors mean that the URLs it was trying to grab were not found. This sounds more like an issue with your web site than with Blue Crab. if you could contact me by email, I would try to help you get better results. Ciao Joe
Like (3)
Jppagliaro
Jppagliaro
20 May 2011
Hello again, This is an addendum to my previous reply. I just want to point out that Blue Crab finds URLs in the pages it "crawls" using various methods. The objective of these methods is to produce the best reproduction of a website on your Mac so that you can view it offline. Some of these methods will produce "candidate" URLs which may not really be URLs on your website. The only way to verify if it is a valid URL is to try and get it. If it is not a valid URL the server will reply with a "404 Not Found" reply. What I could do is offer the option to not use this stronger technique of finding URLs, with the side effect that the download may not be as complete as it would be. This said, I would also like to say this is the first time a user has given Blue Crab a bad rating for trying to generate a very accurate download of the site, despite the side effect that it may construct URls that do not exist in the process. Ciao Joe
Like (1)
Caiyne
22 March 2011
Best app for this category in my opinion. Configurations are a bit unintuitive. I need to explore it more to really say that the ease of use, features, and stability are more bug related.
Like (2)
Version 5.0.01
Jan13
07 October 2010
This is THE BEST ! I am using this software for a long time and there is is nothing out there which can hold a candle next to this one ...
Like (1)
Version 4.9.47
Kobalt
05 October 2010
I have posted here a few time to say how much I appreciate this app, but never assigned any stars, yet. It's about time I do, so there. Five from me.
Like (1)
Version 4.9.47
$24.99

3.3

App requirements: 
  • Intel 32
  • Mac OS X 10.5.8 or later
Developer Website: 
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