OneUtil

What it does

22 developer tools in one keyboard-first app — JSON editor, PDF toolkit, JWT decoder, regex tester, hash, QR, cron, color, diagrams, converters. Everything runs 100% in your browser: no backend, no accounts, no uploads. Your data never leaves the tab, and the whole suite keeps working offline (only live currency rates need a network, and it says so). Depth over count: JSON Schema validation, realdocx + text PDF export, ReDoS-safe regex, diagrams that sync text and canvas both ways. Free.

Fast, private, browser-only developer utilities under one roof: Markdown to PDF/Word, PDF toolkit, JSON editor, JWT, hashes, regex, diffs, converters and diagrams.

A developer's day-to-day toolbox — Markdown to PDF/Word, a PDF toolkit, JSON editing, JWT, hashes, regex, diffs, converters and a full diagram studio. Everything runs in your browser; nothing leaves your device. flowchart TD A([Start]) --> B{Valid?} json { "name" : "OneUtil" , "tools" : 28 , "local" : true } 28 tools, zero accounts Grouped by what you need. Open any of them instantly with ⌘K. No backend, no sign-in, no uploads. Whatever you paste in — PDFs, tokens, passwords — is processed on your device and never sent anywhere. A command palette puts every tool one ⌘K away. Built for people who live on the keyboard. Install it once and it keeps working with no connection. The first visit…from oneutil.dev

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