Calculate CSS selector specificity as (IDs, classes, tags) and total weight. Understand which selector wins in a specificity conflict. Everything runs locally in your browser — nothing is uploaded.
Configure and compare webhook retry strategies — Fixed, Linear, Exponential, and Exponential + Jitter. Calculate total delays and visualize retry patterns.
Calculate total work hours between start and end times with a configurable break. Essential for timesheets and payroll.
Add, subtract, and calculate duration between hours and minutes. Perfect for time tracking and scheduling.
Calculate monthly car loan payments, total interest, and total cost. Enter loan amount, rate, and term for a complete auto financing picture.
Calculate lean body mass from total weight and body fat percentage. Understand your muscle mass versus fat mass.
CSS Specificity Calculator lets you calculate CSS selector specificity as (IDs, classes, tags) and total weight. Understand which selector wins in a specificity conflict. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Calculate CSS selector specificity as (IDs, classes, tags) and total weight. Understand which selector wins in a specificity conflict. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Direct text entry, file upload, or URL-based input — depending on the tool. All numeric values are entered through input fields with real-time updates.
Yes. After the initial page load, CSS Specificity Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check individual tool descriptions for specifics.
No. All code processing — formatting, minification, conversion, hashing — runs locally in your browser.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. SQL uses sql-formatter, JSON uses native JSON.parse, and other formatters follow widely adopted formatting rules.
Yes. All developer tools work fully offline after the initial page load.
Time Converter
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results.
Random Port Generator
Generate random TCP/UDP port numbers from well-known, registered, or dynamic ranges. Useful for network testing, Docker port mapping, and firewall configuration.
Chmod Calculator
Convert between numeric (755) and symbolic (u=rwx,g=rx,o=rx) chmod permission formats. See detailed breakdown for owner, group, and others.
Docker Run to Compose Converter
Convert docker run commands to docker-compose.yml format. Supports ports, volumes, environment variables, networks, restart policies, and container names.
Email Normalizer
Normalize email addresses by removing dots (Gmail), stripping +tags, and lowercasing. Process multiple emails at once for deduplication and cleaning.
Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors.