Free program called HTTrack can be used to browse a website offline on your own PC.
You can download the program from
http://www.httrack.com and it’s around 4 MB. The program is malware-free according to VirusTotal and Web of Trust. Once downloaded (I recommend the portable “without installer” version), unzip the file and double-click on WinHTTrack.exe to run it. You’ll be asked to pick a name and category for your project, and to specify the URL of the site. That’s really all there is to it. The program will then attempt to download all of the files that make up the site, so you can browse and search them on your own PC.