Blue Crab
Blue Crab
5.1.2

3.3

Blue Crab free download for Mac

Blue Crab5.1.2

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.

Related articles

Join over 500,000 subscribers.

Subscribe for our newsletter with best Mac offers from MacUpdate.

How would you rate Blue Crab app?

24 Reviews of Blue Crab

Jppagliaro
29 May 2007
Version: 4.8.9

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.
(3)
2
gordon-6
18 October 2017
Version: 5.1.2
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,
(0)
RJC.NJNYC
06 November 2014
Version: 5.0.07
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.
(2)
Show comments (4)
Fishscale
16 January 2014
Version: 5.0.06
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... ) ...
(3)
Show comment (1)
3
ylluminate
16 February 2013
Version: 5.0.06
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.
(0)
5
Simbasounds
20 December 2012
Version: 5.0.06
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.
(0)
4.5
Sleav
10 December 2012
Version: 5.0.06
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...
(0)
2
L008com
03 April 2011
Version: 5.0.01
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!
(3)
Show comments (2)
4
Caiyne
22 March 2011
Version: 5.0.01
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.
(2)
5
Jan13
07 October 2010
Version: 4.9.47
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 ...
(1)
5
Kobalt
05 October 2010
Version: 4.9.47
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.
(1)
Shmk
24 October 2009
Version: 4.9.18
Doesn't seem to work on snow leopard. Spinning beach ball and crash when ever I tried to input a url
(1)
Show comments (3)
Rc
24 September 2008
Version: 4.9.12
I just downloaded a copy and using it to download a graphics heavy site. The application quits after 5 min or so. It says this is a "fully functional demo" but is this "auto-quit" part of the demo? If so, how can I fully evaluate the program? As I wrote this "review" I already had to restart the program 3 times so that "5 min" interval is getting shorter. I may start looking for an alternative. Too bad HTTrack is not available for the Mac..... OS 10.5.5 iMac G5, 2Ghz, 1GB RAM
(0)
5
Binarypackrat
01 September 2008
Version: 4.9.11
Yes, this app rocks! It does download images from PHP sites like Blogger. Seems to be very stable as well. The best one of all of the ones I have tried.
(2)
5
Itty
19 April 2008
Version: 4.9.6
The most important feature I've been wanting for years, from ANY downloader, is the ability to download images from PHP sites. (Coppermine gallery, Gallery II gallery, WordPress gallery, etc.) This is a big feature that should be proudly boasted. Now I can finally download full size images from my favorite artists galleries with lots of options. Tested on MacIntel Leopard 10.5.2
(1)
Same-Author-As-Hellopig,-Trial-Review
10 December 2007
Version: 4.9.3
IF you want to get a comprehensive download. Make sure you click grab and not grab quickly!
(1)
Same-Author-As-Hellopig,-Trial-Review
10 December 2007
Version: 4.9.3
i dont know why people say blue crab is slow when operating although downloading can be slower than others. make sure you download the latest version of blue crab. -check whether there is virus. -check whether you have enough memory space and hd space. All these may slow the program down.
(0)
Same-Author-As-Hellopig,-Trial-Review
10 December 2007
Version: 4.9.3
Site sucker is not really good. it have many limitations. -Shareware program -no javascript, nonlocalize (meaning that you cant download websites with animations...) -cannot download tools from website. Blue crab has many advantages: -able to download flash and 99.9% of all file types. -nice graphic of websites downloaded. -Provide many updates and help -I can guaranteed almost any website can be downloaded. (you have to be patience) Why buy any other software? this product have one of the most updates!
(1)
Jppagliaro
27 June 2007
Version: 4.9
Some users were complaining of sluggish text field's in the Configuration editor. The cause was: The current browser URL is displayed in certain menu items of the "Grab" menu. As it turns out keyboard processing is related to menu updating, unfortunately, and that caused an overhead when the program was checking for the current URL in the your browser as characters were being typed into certain text fields of the program. This has been fixed by adding an option in Preferences to display full menu items in the "Grab" menu. This option is off by default. To edit the option select "Preferences..." from the Blue Crab menu, and then select the "Behavior" pane. Turn the option on by selecting the "Show full titles in "Grab current web page" menu items.
(1)
Jppagliaro
29 May 2007
Version: 4.8.9
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.
(3)
1
Dinh
27 May 2007
Version: 4.8.9
I'm looking for an application that can download all the files relating to a website for archiving and evaluation. I'd like to relay my initial impressions on this application: * Nag screen very annoying and wastes my time when I'm evaluating which software I want to purchase... * I'm running a newer MBP and with 90% system idle and 1gb of free memory (2GB total)... Typing text into any of the text fields and moving between dialogs is painstakingly slow in Blue Crab. I type.. I wait.. text appears.. I'm not sure what Blue Crab is doing, I've closed and reopened, etc.. No avail.. No other application is behaving that way.. * In creating a new Grab.. I goto view the configuration.. I change some settings. I close the window, it says I can't save the default?! okay fine... Then I say okay.. It doesn't show me where or how to save the settings to another config.. And then it closes it self automatically and looses all the changes I made. Considering that it takes a significant amount of time to type anything into the text fields, and change tabs, this is incredibly annoying. I finally figured out how to goto the configurations section and create a new config. * After creating a grab, which apparently only grabbed 1 file even though I set it to recursively parse the site as would seem intuitive, it seemed like I only had the choice of "Done" and couldn't re-grab and change settings.. I hit done thinking it'd allow me to change settings, but nope, lost everything I typed in. After evaluating the following applications, here is my ranking for website archiving: SiteSucker - The only application to successfully download my test site in entirety. Also the cheapest coincidentally! DeepVacuum - Almost captured the whole site.. But of course missed the backgrounds and other things which I specifically wanted. Second cheapest ($12). Web Devil - Downloaded some of the site. The browsers seem half-baked for site archiving, its more for downloading galleries of images it seems. It is the most expensive application ($35). Blue Crab - Buggy, non-intuitive, and unusable per my previous description. Only file captured after trialing it was a cookies file. Second most expensive app ($25).
(1)
Show comments (11)
Drad
16 March 2007
Version: 4.8.3
You might want to also check out Deep Vacuum although it has confusing options when you get the right combination it works well. What has not worked well for me: Speed Download. SiteSucker used to be great but now not so much because hasn't stayed up with OS X upgrades.
(0)
4.75
Jfm
09 February 2006
Version: 4.3.8
When I switched to the Mac two years ago, I tried several tools for downloading websites, inclluding BlueCrab, which did not convince me at that time. I then chose to use primarily SiteSucker. However, recently, I have not been very pleased with performances of Site Sucker, so I decided to try all available tools on one and the same website, and to see what the result would be. Well, although I initiatlly wondered if I should try again Blue Crab, I am glad I did: it did the best job of all tools I tested (half a dozen of them), and by far. Using the same website as a test case, some tools donwloaded only the initial page, other ones downloaded 43 files, or 76 files - despite careful configurations according to instructions. But when it came to Blue Crab... well, with relatively little need for configuration, it donwloaded all files. i.e. more than 1,200! I was really impressed and immediately bought a license. (It is nice that one can use it with full functionality for ten days, so it offers real opportunity to check first if it works properly.) Moreover, since I experienced a problem with one file, I wrote to the developer: he was really responsive, and he wrote several messages to inquire about details, promising to investigate if it was a bug of Blue Crab, in which case he would correct it in the next release. So really an excellent customer service. It is very simple: after testing all available tools for downloading websites, there is no doubt in my mind that Blue Crab is currently the best in its category for Mac users. I advise even people who were not convinced in the past to try it again.
(1)
3.75
Anonymous
23 March 2005
Version: 4.1.6
This is the 2nd time I've tried this program and I must admit I'm pleasantly surprised. It grabbed over 95% of some sites I tested it on without being too slow, which even beats my beloved app of choice Site Sucker . Blue Crab's interface seems to have been improved also since my last review below. I'd like to see a choice in the preferences to enable it to download only the url in question, as it has the tendency to follow links to external directories and sites and download them also. Apart from that I find it a decent app and worth looking at.
(1)
Show comment (1)
2
Anonymous
13 August 2004
Version: 3.4.3
I've just tested this program. Despite the long feature list the main core activity of downloading websites is not so hot, and in fact is comparable in accuracy to other similar apps. I use SiteSucker and it does the same task as this application minus a few features, however SiteSucker is smaller, faster and above all FREE.
(0)
Show comment (1)