About DevBench

    DevBench is a collection of 82 small utilities that developers, sysadmins and technical writers reach for several times a week: encode something, hash something, convert a config file, work out a subnet, generate a token.

    Everything runs in your browser

    Every tool here is client-side JavaScript. The site is a set of static files — there is no backend, no database and no API. When you paste a private key, a JWT or a customer record into one of these tools, that text stays in your tab's memory and is discarded when you close it.

    You can verify this yourself: open your browser's network panel and watch it while you use a tool. After the page and its script chunk load, there are no further requests.

    What's covered

    • Crypto — Hashes, tokens, keys, ciphers and password tooling.
    • Converters — Move data between formats, encodings and notations.
    • Web — Everyday utilities for building and debugging the web.
    • Images & QR — Generate QR codes and placeholder graphics.
    • Development — Formatters, calculators and references for daily dev work.
    • Network — Subnetting, address maths and MAC utilities.
    • Math — Expression evaluation and quick calculators.
    • Measurement — Time, temperature and benchmark helpers.
    • Text — Inspect, diff, obfuscate and generate text.
    • Data — Validate and parse real-world identifiers.

    Keyboard shortcuts

    • Ctrl / Cmd + K — jump to the search box
    • Up Down — move through search results, Enter to open
    • Esc — clear the search, or close the navigation drawer on mobile
    • Tab from the top of any page — reach the "skip to main content" link

    Favourites and recent tools

    Star a tool with the Save button next to its title and it pins to the top of the sidebar. The last six tools you opened appear there too. Both lists live in your browser only — see the privacy page for exactly what is stored.

    Accuracy

    These tools are useful for day-to-day work, but they are not a substitute for authoritative tooling in regulated or safety-critical contexts. Validate anything that matters — particularly cryptographic output, financial identifiers and network plans — against the canonical implementation for your stack.