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Limit Point Software
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.
Blue Crab lets you:
Blue Crab lets you:
- 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
What's New
Version 5.0.06
- Fixed a bug in Mac OS X 10.7 Lion where the mail server password in Server Settings was not always loaded due to a problem reading the Keychain Access record. This bug affected the mail notification and batch authentication features, which require keychain access.
- The "classic" grabber window sports a new progress indicator that mimics the app's dock tile progress indicator.
Requirements
PPC / Intel, Mac OS X 10.4.4 or later
PPC / Intel, Mac OS X 10.4.4 or later
Blue Crab User Discussion (Write a Review)
Overall:
(11)
(11)
| Downloads:57,123 |
| Version Downloads:534 |
| Type:Internet : Internet Utilities |
| License:Demo |
| Date:17 Apr 2012 |
| Platform:PPC / Intel |
| Price: $24.99 |
Overall (Version 5.x):   |
| Features: |
| Ease of Use: |
| Value: |
| Stability: |
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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.
Blue Crab lets you:
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:
Check the website for bundles and promos.
Blue Crab lets you:
- 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.
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.
Copyright © 2012 MacUpdate LLC
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-5
L008com reviewed on 03 Apr 2011
+3
+51
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
+1
+51
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
+2
+2
Caiyne reviewed on 21 Mar 2011
+1
+10
Jan13 reviewed on 07 Oct 2010
+1
+293
Kobalt reviewed on 05 Oct 2010
+180
+2
+293
+1
+1
+5
+293
Don't rely on your msg being read here (although it might be for all I know), but email to joe@limit-point.com.
+13
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
+2
+11
Binarypackrat reviewed on 01 Sep 2008
+1
+53
Itty reviewed on 19 Apr 2008
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
-9
-1
-9
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.
+93
Prypjat rated on 15 May 2011