Free tools, no signup

Calculate square footage of rooms, floors, walls, and irregular spaces. Useful for flooring, paint, and renovation estimates.

Every percentage calculation in one place — percent of, percent change, increase/decrease, tip, discount, and more.

Exact age in years, months, days, hours, and minutes from any birthdate. Plus age difference between two dates.

Calculate hours between two times. Useful for timesheets, billing, and project tracking.

Compute volume of any box from length, width, and height. Supports multiple unit systems and conversions.

Calculate dim weight for shipping by FedEx, UPS, and USPS. Compare against actual weight to find billable weight.

Calculate package girth for shipping — needed for oversize fee thresholds on most carriers.

Quick-reference conversion sheets for length, weight, temperature, area, volume, and more.

Encode or decode Base64 strings instantly. Handles UTF-8, supports file upload, and runs entirely in the browser.

URL-encode or URL-decode any string. Useful for query parameters, escape characters, and debugging APIs.

Format, validate, minify, and compare JSON. Tree view, error highlighting, and copy-to-clipboard.

Generate UUIDs (v1, v4, v5) in bulk. Validate UUID strings and inspect their version and variant.

Compute MD5, SHA-1, SHA-256, SHA-512, and other hashes for any string or file.

Convert between Unix epoch timestamps and human-readable dates. Supports milliseconds and multiple timezones.

Regular expression reference and tester. Cheat sheet, common patterns, and live regex playground.

Build and decode cron expressions. Shows the next 10 run times for any schedule.

Test password strength against common attacks. Estimates time-to-crack and suggests improvements.

Count words, characters, sentences, and paragraphs. Reading time estimate and keyword density.

Repeat any text N times with optional separators. Useful for testing, mockups, and bulk content generation.

Convert text between camelCase, snake_case, kebab-case, PascalCase, UPPER, lower, Title Case, and more.

Resize, crop, compress, and convert images in the browser. No upload — runs entirely on your device.

Synchronized world clock and meeting time finder for distributed teams.