Calculators
Aspect Ratio Calculator
Calculate aspect ratios from dimensions or find dimensions from ratios. Common presets and CSS aspect-ratio output.
Free Web Developer Tools
Online utilities for developers — formatters, generators, converters, and more. All tools run in your browser, no data is sent to any server.
Calculators
Bitwise Calculator
Perform bitwise operations (AND, OR, XOR, NOT, shifts) on numbers. View results in decimal, hex, binary, and octal.
Calculators
Byte Unit Converter
Convert between byte units — bits, bytes, KB, MB, GB, TB, PB. Toggle between SI (1000) and IEC (1024) standards.
Calculators
Chmod Calculator
Visual chmod permission calculator. Toggle read, write, execute per user/group/other. Shows numeric and symbolic notation.
Calculators
Development Timeline Estimator
Estimate project timelines using PERT methodology. Optimistic, likely, and pessimistic estimates with Gantt visualization.
Calculators
IPv4 Subnet Calculator
Calculate IPv4 subnet details. Get network address, broadcast, host range, wildcard mask, and binary representation.
Calculators
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and custom bases (2-36). Live conversion as you type.
Calculators
Project Cost Calculator
Calculate project costs with team roles, hourly rates, overhead, and profit margin. Breakdown by role with burn rate analysis.
Calculators
Reading Time Calculator
Calculate reading and speaking time for any text. Get word count, sentence count, paragraph count, and detailed statistics.
Calculators
Sprint Velocity Calculator
Track sprint velocity with average, standard deviation, and backlog forecasting. Visual trend chart for agile teams.
Calculators
Story Points Estimator
Fibonacci-based story point estimation tool. Select point cards, track tasks, and export estimates as CSV.
Calculators
Typography Scale Calculator
Calculate a modular type scale with customizable base size and ratio. Generate CSS custom properties for your typography system.
Calculators
Unix Permissions Visualizer
Visualize and calculate Unix file permissions. Convert between octal, symbolic notation, and interactive checkboxes.
Calculators
Viewport Units Calculator
Convert between px and viewport units (vw, vh, vmin, vmax). Auto-detect viewport size with formula reference.
