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Fast, privacy-friendly utilities for developers, students, and everyday tasks. Everything runs right in your browser — no signup, no upload, no tracking.
No signup, nothing to install — every tool runs in your browser.
Estimate token costs, repair JSON output, and build function calls.
Essential tools for modern devs & API tasks
Color, gradients & layout utilities for pixel-perfect UI
Write, count, convert & polish words at speed
Loans, mortgages, ROI & pricing math made simple
Units, time & number formats — instant conversions
Everyday math, health, time & education helpers
Most online tools ask you to sign up, accept cookies, or upload your files to a server you can't audit. We do things differently: every tool here runs entirely in your browser. That means three things for you:
We focus on utilities that solve a single problem well — from calculating loan payments and converting units, to formatting JSON and generating QR codes. With 230+ tools across finance, math, health, unit conversion, and developer utilities, there's a good chance we have what you need. New tools are added regularly, so bookmark this page.
Looking for something specific? Jump straight to a category, or open the full tools directory to search all 236 tools.
Some of our most-used utilities, good places to start: