Free browser-based tools for practical everyday workflows.
Open a collection, choose a tool, enter values, and copy the result. All projects are static GitHub Pages sites built for fast, no-sign-up use.
PDF Tools
Merge, split, compress, convert, rotate, watermark, number, and edit PDF files.
BusinessBusiness Tools
Pricing, margins, fees, freelance rates, invoices, cash flow, and startup calculators.
DeveloperDeveloper Tools
JSON, regex, timestamps, Base64, JWT, UUID, hashes, and API payload utilities.
ImagesImage Tools
Resize, compress, convert, inspect metadata, favicons, and social image helpers.
ContentContent Tools
Word count, slugs, case conversion, meta descriptions, subtitles, UTM links, and writing helpers.
FinanceFinance Calculators
Interest, loans, mortgage, savings, retirement, salary, debt, and personal finance calculators.
SEOSEO Tools
Title checks, meta descriptions, SERP previews, robots.txt, sitemaps, schema, and canonicals.
ConvertersUnit Converter Tools
Length, weight, temperature, area, volume, speed, pressure, data, cooking, fuel, angle, and energy converters.
TimeDate & Time Tools
Date duration, business days, age, countdown, ISO week, time zones, Unix time, and working hours.
DesignColor & Design Tools
Color conversion, contrast, palettes, gradients, shadows, border radius, opacity, clamp, and filters.
AccessibilityAccessibility Tools
Contrast, alt text, headings, links, labels, tap targets, readability, ARIA, focus, and keyboard checks.
QR CodesQR & Barcode Tools
QR payloads, Wi-Fi, vCards, mailto, SMS, phone, geo links, events, UPC, EAN, and ISBN helpers.
EmailEmail Tools
Subject, preheader, preview, mailto, plain text, HTML minify, unsubscribe, UTM, spam words, CTA, and size tools.
EcommerceEcommerce Seller Tools
SKUs, listings, dimensional weight, reorder points, stock cover, returns, discounts, ROAS, and tags.
MathStudent Math Tools
Percentages, fractions, ratios, averages, GPA, grades, geometry, scientific notation, quadratics, and primes.
WritingReadability Tools
Readability score, sentence length, passive voice, paragraphs, plain English, reading time, keywords, and transitions.
SecurityPrivacy & Security Tools
Passwords, passphrases, SHA-256, file hashes, random values, UUIDs, JWT decoding, redaction, entropy, URL checks, and Base64.
HealthHealth Calculator Tools
BMI, BMR, TDEE, calorie deficit, macros, hydration, heart rate zones, sleep, and body calculators.
KitchenRecipe & Kitchen Tools
Recipe scaling, cup-to-gram conversions, baking pan sizing, dough hydration, grocery cost, and meal prep tools.
HomeHome Improvement Tools
Paint, flooring, tile, wallpaper, concrete, mulch, gravel, fence, deck, drywall, AC, lighting, and moving estimators.
AutoAuto & Car Tools
Fuel cost, MPG, EV charging, tire size, depreciation, loan, commute, ownership, and road trip calculators.
TravelTravel Planner Tools
Travel budgets, trip splitting, hotel costs, time zones, packing, luggage, passport checks, and itinerary planning.
WorkplaceHR & Workplace Tools
Salary, hourly rate, overtime, PTO, meetings, interviews, offer comparison, turnover, recruiting, and capacity tools.
ProductivityProductivity Tools
Pomodoro sessions, focus time, task priority, Eisenhower matrix, time blocks, habits, OKRs, and weekly planning.
SocialSocial Media Tools
Caption length, hashtags, bios, hooks, engagement, retention, content calendar, CPM, CPC, and social ROI tools.
EventsEvent Planning Tools
Event budgets, cost per guest, RSVP, attendance, tables, catering, drinks, staffing, supplies, and ticket revenue.
NetworkNetwork Admin Tools
CIDR, subnet masks, VLSM, DNS TTL, bandwidth, latency, packet loss, uptime, DHCP, Wi-Fi, backups, and logs.