I save screenshots so I will remember things. Boarding passes, door codes, a receipt, a setting I changed once. Then I need one of them and I scroll through a hundred thumbnails.

Snootling is a single HTML page that fixes that without an account or an upload. You drop screenshots on it, it reads the words in each one, and you search. The matched words light up inside the picture. Then it saves everything as one HTML file you keep.

A wall of 100 screenshots, a search for gate e29, and the saved file reopened offline

How it reads

The page carries tesseract.js 7, its WebAssembly core and the English model, so it downloads nothing. Four workers read pictures in parallel, and each word box is scaled back to the original size so the highlight lands on the right pixels at any zoom. The page's content security policy sets default-src 'none', so its own code cannot fetch or post anything. A policy does not cover navigation, so I call it a guard, not a proof. The tests record every request and require them all to be local.

The part that was not obvious

OCR drops words. In my first run, a small "Gate" label next to a huge gate code was read as noise, and the search gate e29 found nothing because every word had to match. Three changes fixed it:

  • If no picture has every word, show the closest ones, and weight rare words (e29) above common ones (gate).
  • Forgive one misread character in longer words.
  • For codes, forgive look-alikes such as 0 and O, or 1 and l.

The numbers

I drew 100 made up phone screenshots, 31 in dark mode and 20 in small type, each with one made up code. Then I read them in the page, searched for each code and checked that the lit words sit on it. Chromium 153 found 100 of 100 and Firefox 155 found 99. The saved file is 14 to 18 MB. I reopened it with the network off and repeated 20 searches: 20 of 20 in both. The method and the raw results are in the repo.

Synthetic screenshots are clean. Real ones will do worse.

What is rough

English only. No Safari testing. The saved file holds your full screenshots, so anyone with it can read what is in them, passwords included.

Try it 

curl -LO https://raw.githubusercontent.com/Arthur031221/snootling/main/dist/snootling.html && open snootling.html

Source and tests: https://github.com/Arthur031221/snootling. MIT licensed. I would like to hear how it does on your screenshots.