500+ free tools across 21 categories: finance, health, math, stats, puzzle generators, image tools and more. Everything computes in your browser — no signup, no uploads, no tracking. Generate crosswords and sudoku you can print or embed on your own site.
Hi Product Hunt,
I built ABC Tools because most free calculator sites are covered in ads, hide basic features behind signups, and upload your data to a server.
Everything here runs in your browser. Your numbers, photos and word lists never leave your device. No account, no ads.
There are now 500+ tools across 21 categories. A few I like:
Puzzle makers: crosswords, sudoku, word searches, logic grids. Solve on the page, print, or embed on your own site.
Image tools: convert, resize, compress, crop and analyze photos without uploading them anywhere.
Poker calculators for 6 variants, with exact odds instead of simulations.
A cross-stitch pattern maker that turns photos into charts with real DMC floss colors.
The usual stuff done properly: loans, statistics, unit conversion, date math, regex, JSON.
Each tool has a short guide explaining the math behind it.
If something you need is missing, tell me and I'll probably build it.
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The embed feature for puzzles is genuinely useful, but it would be great if there were an option to customize the styling of embedded crosswords and sudoku to match the host site's color scheme and font, right now they probably look pretty out of place on most blogs.
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Made a sudoku and embedded it on my blog in under two minutes, which was way easier than I expected. Love that nothing leaves the browser.
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Love how instantly usable these are, no friction at all. One thing I'd kill for though is a way to save my favorite tools to a small personal sidebar or get a permalink for the inputs I used, so when I'm tweaking a mortgage calc or word puzzle I don't have to re-enter everything each time. That would make it feel more like a real workspace.
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honestly this looks super handy and i love that nothing leaves the browser. one thing though, can you add a way to save or bookmark favorite tools, like a little sidebar or local storage thing. otherwise digging through 500 tools to find the one i used last week is kind of a pain.
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honestly the fact that everything runs in the browser with no signup feels kind of rare these days. love that i can just open a calc and use it immediately, no nonsense.
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The embed feature for puzzles is genuinely useful, but it would be great if there were an option to customize the styling of embedded crosswords and sudoku to match the host site's color scheme and font, right now they probably look pretty out of place on most blogs.
Made a sudoku and embedded it on my blog in under two minutes, which was way easier than I expected. Love that nothing leaves the browser.
Love how instantly usable these are, no friction at all. One thing I'd kill for though is a way to save my favorite tools to a small personal sidebar or get a permalink for the inputs I used, so when I'm tweaking a mortgage calc or word puzzle I don't have to re-enter everything each time. That would make it feel more like a real workspace.
honestly this looks super handy and i love that nothing leaves the browser. one thing though, can you add a way to save or bookmark favorite tools, like a little sidebar or local storage thing. otherwise digging through 500 tools to find the one i used last week is kind of a pain.
honestly the fact that everything runs in the browser with no signup feels kind of rare these days. love that i can just open a calc and use it immediately, no nonsense.