Pure utilities.
No clutter.
Tools that just work.
The Archeio is a collection of fast, free tools built for everyday use. No accounts required. All calculation logic runs 100% locally in your browser. Open a tool, get your answer, close the tab.
No accounts
No sign-ups
Nothing uploaded
Logic runs in your browser
Free forever
Tool Directory — Vol. I
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01 Sleep Cycle Calculator — Find your ideal bedtime based on 90-min sleep cyclesLive
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02 Word Counter — Count words, characters, and reading time instantlyLive
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03 Percentage Calculator — Percentages, increases, decreases, and differencesLive
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04 Case Converter — UPPERCASE, lowercase, Title Case, camelCase and moreLive
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05 JSON Formatter — Format, validate, fix and convert JSON to CSV. Nothing leaves your browser.Live
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06 QR Code Generator — Static QR codes for links, Wi-Fi, email and more. PNG or SVG.Live
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07 Citation Generator — APA, MLA, Harvard and Chicago references with in-text citationsNew
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08 Readability Checker — Flesch, Flesch–Kincaid, Fog, SMOG and Coleman–Liau scoresNew
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09 Essay Planner — Words per paragraph, a copyable outline and a writing scheduleNew
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10 Page Count Calculator — How many pages is your essay? By font, size and spacingNew
Student writing tools
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Why This Exists
The web has drifted. Tools that should take two seconds now require an account, three modals, and a newsletter subscription. The Archeio is a correction. Every tool here loads fast, runs locally, and asks nothing of you.
We call it an Archeio — from the Greek for archive or record office — because that is what this is: a permanent, public-service collection of useful things. No venture capital. No growth metrics. Just tools.