Which style should I use?
Scramble when the page should still look like your product, for a demo or a recording: every word turns into look-alike gibberish of about the same width. Blur when you want it obvious that something is hidden. Redact when you want black bars, or a picture that must not be recognizable at all. The text is scrambled under all three, so none of them leaves real text underneath. You can mix them on one page with the picker.
Are images hidden too?
Yes, in every style: photos, videos, canvas drawings, charts and background images are blurred, or blacked out in Redact. Icons under 24 px stay sharp, so buttons and menus still make sense. A blurred picture is the real picture blurred, so use Redact for one that must not be recognizable at all.
Can I show just one part of a hidden page?
Yes. With the whole page hidden, choose Pick elements and click a part with the tool of the page’s style: only that part shows. Click it again to hide it again. A part you hide or show follows its element: in a long list that reuses its rows as you scroll, a row you picked hides or shows whatever record moves into it, and the record you picked can appear in another row as it is. If the page replaces the element itself, the pick ends there: a part you hid on a readable page shows, and a part you showed is hidden again, so check before sharing.
What does it store?
One setting, the hiding style you chose, on your device in the extension’s own storage, so the popup, the picker and the shortcuts use it. No page content, no browsing history and nothing about the sites you visit, and nothing is ever sent anywhere.
Does it change the website or my data?
No. It only changes what your browser shows you. Nothing is sent to the site, form fields and editors are never written to, and Restore page (or the shortcut) brings back the original text. One caveat: some apps turn text into a field when you click it. Restore before editing there, or the app could save the scrambled text.
Does it stay on when I click a link?
Yes. Hiding the whole page stays on while this tab stays on the same site, through links, reloads and back and forward, until you click Restore page or go to another site. The same site means the exact address: a subdomain, such as app.example.com after example.com, counts as another site, and its pages show their real content. Pages you open by typing in the address bar may open unhidden; check before sharing. Links you open in a new tab aren’t hidden. Picks stay on the page you made them on.
What does it not hide?
Anything outside the page itself: the address bar, other tabs and browser notifications. On the page, icons under 24 px stay sharp, and so can a few pictures a site’s stylesheet draws as decoration (bullets, borders, backgrounds that appear only on hover). Frames embedded from other sites, such as chat widgets, videos or ads, stay as they are: Chrome only lets the extension into the site you clicked it on. The popup tells you how many of those frames are visible, so take a look before you share. The tab title, tooltips and placeholders are scrambled in every style, never blurred or covered. Letters in a few scripts it does not cover yet, such as Armenian, Georgian or Tamil, also stay readable.
Does it work on every page?
On almost every website. Local files work only if you turn on “Allow access to file URLs” for ShareProof in Chrome’s extension settings. Chrome does not let any extension run on its own pages (like settings or new tab), its error pages, other extensions’ pages, the Chrome Web Store or the built-in PDF viewer; there, the popup explains why the buttons are off. Text a site’s stylesheet adds to the page (CSS content) stays readable.
Are there keyboard shortcuts?
Yes. Alt+Shift+S hides or restores the whole page in the style you chose and Alt+Shift+E starts picking elements (Option+Shift+S and Option+Shift+E on a Mac; Alt+Shift+H and Alt+Shift+E on a Chromebook), without opening the popup. You can change the keys at chrome://extensions/shortcuts.
Is its blur safer than a plain blur?
Yes. A plain blur leaves the real text under it, and in some cases it can be partly read back. ShareProof scrambles the text first and blurs the gibberish, so there is no real text to recover. Redact works the same way: its black bars cover scrambled text. Pictures are blurred as they are, so use Redact for a picture that must not be recognized.
Can someone unscramble a screenshot?
Not by undoing it: letters are replaced using a secret key that exists only in that page’s memory, and digits are simply shown as X. But a screenshot still shows the length and shape of each line, and scrambled text also shows capitals, punctuation and symbols, and how wide each word is in the page’s font. With a list of likely names and that font, someone could often tell which name a short scrambled one is. Identical text in the same font scrambles identically on the same page.