Welcome to UsefulToolkit
A collection of free, privacy-first browser-based tools. No uploads, no servers - everything runs in your browser.
File & Data
CSV, JSON, PDF, and file conversion tools
40 toolsImage Tools
Resize, convert, compress, and edit images
45 toolsUnit Converters
Convert between units, currencies, and measurements
50 toolsFinance & Business
Invoice, tax, payroll, and financial calculators
40 toolsWriting & Language
Grammar helpers, transliteration, and word games
35 toolsDeveloper Tools
JSON, regex, formatters, and code utilities
70 toolsSEO & Marketing
Meta tags, content analysis, and marketing helpers
35 toolsSocial Media
Bio generators, post formatters, and hashtag tools
30 toolsHealth & Fitness
BMI, calorie, heart rate, and wellness calculators
30 toolsProductivity
To-do, notes, kanban, and time tracking tools
30 toolsEducation & Learning
Flashcards, quiz makers, and study material
30 toolsUtility Tools
Timers, calculators, and everyday tools
35 toolsText Tools
Transform, analyze, and manipulate text
40 toolsVideo Tools
Trim, convert, GIF maker, and frame extractor
30 toolsGames & Fun
Puzzles, trivia, name generators, and mini games
40 toolsCSS & Design
CSS generators, visual builders, and design helpers
50 toolsEncoding & Decoding
Encode, decode, and convert between formats
30 toolsColor Tools
Pick, convert, and generate color palettes
23 toolsAudio Tools
Trim, convert, generate tones, and visualize audio
35 toolsNumber & Math
Calculators, converters, and math utilities
40 toolsAstrology & Esoteric
Explore zodiac signs, numerology, and mystical calculations
33 toolsEvent Planning
Plan events, calculate budgets, and manage guest lists
32 toolsShipping & Logistics
Calculate shipping costs, box sizes, and delivery estimates
31 toolsScience
Periodic table, physics, chemistry calculators
30 toolsSecurity & Privacy
Passwords, hashing, encryption, and security tools
35 toolsConstruction & Home
Paint, tile, concrete, and room calculators
30 toolsGeography & Maps
Distance, coordinates, timezone, and map tools
25 toolsTypography & Fonts
Font previewer, type scale, and pairing tools
20 toolsAutomotive & Vehicles
Calculate fuel, tires, engine specs, and vehicle costs
32 toolsElectrical & Electronics
Calculate, simulate, and design electronic circuits
33 toolsNetworking
Subnet, IP, DNS, and port reference tools
15 toolsPet & Animal
Calculate pet food, health, age, and care needs
33 toolsAgriculture & Gardening
Plan gardens, calculate yields, and manage crops
33 toolsStationery & Office
Calculate paper sizes, printing layouts, and office supplies
33 tools3D Printing & Maker
Calculate print settings, filament usage, and maker project specs
33 toolsTextile & Fashion
Convert sizes, calculate fabrics, and plan patterns
35 tools