Other free, browser-based tools from the team behind cidrcalculator.net. Calculators, encoders, developer references, time and text utilities — all ad-supported, no signup, no install.
Compute square footage for rooms, flooring, paint, and landscaping projects in any unit.
Percent of, percent change, discount, tip, and reverse-percentage calculations.
Exact age in years, months, weeks, days, hours, and minutes from any birthdate.
Time-card math: hours between two times, totals across a week, with optional break deductions.
Shipping dim weight for UPS, FedEx, USPS, and DHL. See which weight a carrier will actually bill.
Cubic feet, inches, meters, and centimeters. For shipping, storage, and packaging planning.
Length + girth for parcel sizing rules. Includes carrier limits and oversize thresholds.
Convert between margin and markup percentages with worked examples for retail and wholesale.
Free, unbiased solar and off-grid calculators — system sizing, savings and payback, and battery banks.
Encode or decode Base64 strings. Handles URL-safe variants and binary files.
Percent-encode and decode URL parameters and full URIs. Component-aware encoding.
MD5, SHA-1, SHA-256, SHA-512, and other hash algorithms for text and files.
Format, minify, validate, and diff JSON. Tree view with path copying and key search.
Generate UUIDs in versions 1, 4, and 7. Bulk generation and format options.
Word, character, sentence, and paragraph counts with reading time estimates.
Repeat a string N times with separators. Useful for generating test data and placeholders.
camelCase, snake_case, kebab-case, PascalCase, Title Case, and more. Side-by-side preview.
Browser-based image utilities: resize, compress, convert, and crop without uploading to a server.
Cron expression builder and reference with human-readable explanations and common recipes.
Regex syntax reference with worked examples, tester, and common pattern library.
Unit conversion reference across length, weight, volume, temperature, energy, and data.