Free browser-based utilities and calculators — private by default.
No accounts, no uploads, no backend. Use search in the header or jump into a category below.
Browse by category
22 categories · 164 tools
Every tool runs client-side. Pick a category to explore.
- AutomotiveFuel economy, tire size, and other car calculators.
- ConversionsUnit, format, and data converters for quick one-off transforms.
- Cooking & RecipesScale recipes, convert measurements, and plan cook times.
- DesignColor, CSS, and visual utilities for designers and front-end work.
- Dev UtilitiesEveryday helpers for developers — IDs, JSON, encoding, and more.
- Electronics & RoboticsCalculators for circuits, motors, and robot builds.
- Energy & UtilitiesEstimate electricity, water, and generator costs for your home.
- FinanceMortgage, tax, salary, paycheck, currency, interest, tip, ROI, and retirement estimators.
- FitnessBMI, calories, macros, and other health estimators.
- GamingMath and probability calculators for games — damage, drop rates, and dice.
- Home & DIYEstimate materials for paint, flooring, concrete, and other home projects.
- MathCalculators and number tools for everyday math problems.
- Music & AudioTempo, tuning, and music theory calculators.
- PetFun estimators for pet owners.
- PhotographyDepth of field, exposure, and print calculators for photographers.
- Real Estate & MovingEstimate housing costs, moving needs, and commutes.
- SEO & MarketingCheck, preview, and optimize content for search and social.
- Student & EducationGPA, grade, and study calculators for school.
- Text ToolsFormat, count, transform, and generate text in the browser.
- Time & DateTimestamps, timezone helpers, and date calculators.
- Travel & PackingPlan trips, pack smarter, and estimate travel costs.
- Wedding & EventsPlan seating, budgets, and countdowns for weddings and events.
Most popular tools
Fast starters from the current catalog.
- GUID / UUID GeneratorGenerate UUID v4, v7, or v1 identifiers in your browser.
- JSON Formatter & ValidatorPretty-print, minify, and validate JSON with clear error messages.
- JWT DecoderDecode JWT header and payload without verifying signatures.
- Password GeneratorGenerate strong random passwords with customizable character sets.
- Lorem Ipsum GeneratorGenerate placeholder paragraphs, sentences, or words for mockups.
- Word & Character CounterCount characters, words, sentences, paragraphs, and reading time.