Wayback Machine
web.archive.org
Shows you what a web page looked like on a date in the past
archive.ph
Freezes one page on demand into a snapshot that keeps working when it moves.
You paste a URL, it renders the page and stores a flat copy of the text and images plus a screenshot, at a permanent short link. Because it captures on request and renders JavaScript first, it catches pages the Wayback crawler misses, including a lot of single-page apps. It is a different tool from a crawl-based archive: one page at a time, no history, no site-wide walk.
Questions
Works the moment the page loads. No account, no email, no trial. It archives one page at a time with no crawl, the operator is anonymous, and some DNS resolvers have historically had trouble reaching its domains.
Yes. archive.today sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
It archives one page at a time with no crawl, the operator is anonymous, and some DNS resolvers have historically had trouble reaching its domains.
Alternatives
Same category or same task, ordered by how closely they overlap.
web.archive.org
Shows you what a web page looked like on a date in the past
printfriendly.com
Strips ads and navigation off a page so you can print or save it as a PDF
gutenberg.org
Seventy thousand out-of-copyright books as clean EPUB, Kindle and plain text
feedly.com
Collects the sites you follow into one reverse-chronological list you control
instapaper.com
Saves an article for later and strips it down to just the text
zbib.org
Turns a URL, DOI or ISBN into a formatted citation in any of 10,000 styles