Skip to content
TechnologyTools

Free · Browser-based · No sign-up

The right tool, two clicks away.

134 precise calculators, converters and generators for hardware, networking, security, files and development — everything runs locally in your browser.

Popular:

134 tools · 16 categories · zero telemetry

All tools →
PSU CalculatorpopularEstimate total system wattage and find the optimal Power Supply Unit (PSU) rating for stability.hardwareIPv4 Subnet CalculatorpopularBitwise IPv4 subnetting calculations with full network, broadcast, wildcard, and binary breakdowns.networkingStorage Capacity CalculatorpopularComprehensive multi-unit data storage converter covering 12 standard SI decimal and IEC binary units with simultaneous real-time conversion.convertersMbps to MB/s ConverterpopularConvert network bandwidth (Mbps) to operating system file download rates (MB/s).convertersSecure Password GeneratorpopularGenerate cryptographically secure passwords locally via crypto.getRandomValues() with accurate real-time entropy scoring and zero server transmissions.securityUUID Generator (v4 & v7)popularGenerate random UUID v4 and time-ordered UUID v7 identifiers locally using native browser crypto primitives with bulk and case options.securityeDPI CalculatorpopularCalculate your effective sensitivity (eDPI) by combining mouse DPI with in-game sensitivity.gamingVideo File Size & Bitrate CalculatorpopularComprehensive video calculator: estimate file sizes from bitrates, compute bitrates for upload file size targets, and calculate transfer times.video

Browse by category

Recently added

Text Toolspopular

Font Tester

Professional online typography tool with 120+ fonts across 8 categories to test, preview, compare side-by-side, and customize typography in real-time with responsive controls, color palettes, and CSS or image export.

Image Toolspopular

Image Compressor

Reduce image file size in your browser with adjustable quality, format, and a download-ready preview.

Image Toolspopular

Image Resizer

Set exact image dimensions with a ratio lock and export a resized copy without uploading your image.

Image Tools

Image Cropper

Select a crop area with pointer or touch input, choose a ratio, and download the cropped image.

Image Tools

Image Pixelator

Paint over sensitive regions with adjustable pixelation. Pointer and touch input are supported and the source stays local.

Image Tools

Image Blur Tool

Apply a reversible blur brush to selected regions of a photo using mouse, touch, or stylus input.

Built like an engineering tool

Every tool on this site runs entirely in your browser: there is no account, no upload, and no telemetry — your inputs are processed on your device and nothing is sent to a server. Results follow documented standards (IEC unit prefixes, RFC networking rules, WCAG formulas), and each tool page explains its formula, shows a worked example, and states its limitations. The site is built and maintained by one developer; you can read more on the about page and the guides.

01 · Documented formulas

Every calculation shows the standard or formula behind it, so results are verifiable.

02 · Local execution

Passwords, hashes, files, and network inputs never leave your computer.

03 · No signup, no tracking

Open a page, use the tool, leave. Nothing to install and nothing to register.