The full toolbox

Every free Gizmoop tool, in one place

Browse all 130+ free online tools, organised by category. No signup, no upload, and no usage limits, ever.

Gizmoop is a single home for the kind of small, useful tools the internet used to be full of. Every tool here runs entirely in your browser, your text, images, and files never leave your device. We ship at least one new tool every week, and we never charge or ask you to sign up.

Use the search bar to find a tool by name, or click a category pill to filter the directory. The categories below have short introductions explaining what each group covers and the most popular tools inside.

📝 Text & Writing 25 tools

Free online text and writing tools for writers, students, marketers, and developers. Count words and characters, change letter case, generate placeholder text, calculate reading time, and clean up messy formatting, all in your browser with no upload required.

Word Counter
Live word, character, sentence, paragraph counts.
Popular
Character Counter
Live character count with platform limits.
Case Converter
UPPERCASE, lowercase, Title Case, sentence, plus camelCase, snake_case.
Lorem Ipsum
Generate paragraphs of placeholder text in 5 variants, 4 formats.
Reading Time
Estimate reading and speaking time. Reverse mode for talks.
Twitter / X Counter
Stay within the 280-character limit.
Whitespace Remover
Trim extra spaces, tabs, line breaks, and blank lines with granular toggles.
Text Reverser
Flip characters, words, sentences, lines, or paragraphs.
Remove Duplicate Lines
Clean repeated lines while preserving order.
Alphabetize List
Sort A-Z, Z-A, numeric, length, or randomise.
Find & Replace
Bulk replace with regex support and live preview.
Sentence Counter
Per-sentence length analysis, Hemingway-style flagging.
Paragraph Counter
Per-paragraph word and sentence counts with length flags.
Diff Checker
Compare two texts side by side with LCS-based diff.
Keyword Density
1, 2, or 3-word n-gram density with stop word filter.
Meta Description Checker
Check meta description and SEO title tag length against Google limits.
Title Tag Length Checker
Check SEO title tag against 60-char Google limit. Live counter.
New
Text to Slug
URL slug generator plus camelCase, snake_case.
HTML Encoder
Encode/decode HTML entities. Named, decimal, hex.
Base64 Encoder
Encode/decode Base64 with UTF-8 and URL-safe options.
URL Encoder
Encode/decode URLs with encodeURI and encodeURIComponent.
Random Word Generator
Generate words with part-of-speech and length filters.
Readability Checker
6 readability scores including Flesch-Kincaid.
Word Cloud Generator
Visualise word frequency as a downloadable PNG cloud.
New
Citation Generator
APA, MLA, Chicago, and Harvard citations from one form.
New
Random Sentence Generator
Random sentences for writing prompts and test data.
New

📄 PDF Tools 18 tools

Browser-based PDF tools that never upload your file to a server. Merge, split, compress, protect, unlock, watermark, number pages, rotate, reorder, extract, delete pages, plus PDF↔Word/JPG/PNG/text conversion. Everything runs locally. No signup, no daily limits, no page caps, no watermark.

🧮 Calculators 30 tools

Everyday calculators for math you do not want to set up a spreadsheet for. Find your exact age, work out percentages and BMI, plan loan, EMI and mortgage repayments, project compound interest and SIP growth, estimate Pakistan salary tax, calculate Zakat, value gold by karat, plus 18 new health, education, and general calculators.

Age Calculator
Exact age in years, months, days, weeks, and hours. Next birthday countdown.
Percentage Calculator
Tip, discount, percent change. Four modes in one tool.
BMI Calculator
Body mass index with metric and imperial units. WHO categories.
Loan Calculator
Monthly payment, total interest, and full amortization schedule.
EMI Calculator
Equated monthly installment with full amortization schedule.
Mortgage Calculator
Monthly payment with property tax, insurance, and PMI breakdown.
Compound Interest Calculator
Final balance, total interest, and a year-by-year growth table.
SIP Calculator
Project monthly investment growth with a year-by-year table.
Salary Calculator
Convert pay between hourly, daily, weekly, monthly, and annual.
Pakistan Salary Calculator
FBR income tax and take-home pay for the 2025-26 tax year.
Zakat Calculator
Annual Zakat at 2.5 percent with a Nisab threshold check.
Gold Price Calculator
Value of gold by karat and weight, with a weight converter.
Calorie Calculator
BMR, TDEE, and calorie targets with a balanced macro split.
New
Body Fat Calculator
US Navy body fat percentage with fat mass, lean mass, and ACE category.
New
Ideal Weight Calculator
Hamwi, Devine, Robinson, Miller, and WHO BMI healthy weight range.
New
Due Date Calculator
Pregnancy due date by LMP or conception, with gestational age.
New
Ovulation Calculator
Ovulation day, fertile window, and most-fertile two days.
New
Sleep Calculator
Bedtime or wake time using 90-minute sleep cycles.
New
GPA Calculator
GPA on the 4.0 scale with unlimited courses.
New
CGPA Calculator
Cumulative GPA across semesters on the HEC 4.0 scale.
New
Matric Marks Calculator
Overall percentage and grade for Pakistani board exams.
New
Grade Calculator
Weighted grade and what you need on the final exam.
New
Words to Pages
Word count to page count and back, with font and spacing options.
New
Date Calculator
Days between two dates, business days, add or subtract from a date.
New
Time Calculator
Add and subtract durations or convert to decimal hours.
New
Hours Calculator
Work hours and pay for a single shift or a full week.
New
Scientific Calculator
Sin, cos, tan, log, ln, exponents, factorial, pi, e.
New
Tip Calculator
Restaurant tip with bill split and round-up option.
New
Discount Calculator
Sale price, percent off, and stacked discount support.
New
Electricity Bill Calculator
Pakistan residential bill from units with editable slab rates.
New

🔄 Converters 40 tools

Free online unit and currency converters for what you need every day. Convert weights, lengths, areas, volumes, speeds, data, pressures, energy, cooking, fuel economy, temperatures, currencies, and timezones. Hub pages cover all units in one place, dedicated pages handle the most-searched specific pairs like kg to lbs, USD to PKR, Marla to square feet, feet to meters, and Celsius to Kelvin.

Currency Converter
38+ currencies with live exchange rates updated hourly. USD, PKR, EUR, INR.
Weight Converter
All weight units in one tool. Kg, lbs, grams, ounces, stone, tola.
Hub
Length Converter
All length and distance units. Meters, feet, inches, km, miles, yards.
Hub
Area Converter
Square feet, Marla, Kanal, acres, hectares, square meters.
New
Volume Converter
Liters, gallons (US and UK), cups, tablespoons, fluid ounces.
New
Speed Converter
km/h, mph, m/s, knots, Mach, and ft/s.
New
Data Storage Converter
Bytes, KB, MB, GB, TB, PB, and bits. Binary 1024-based.
New
Pressure Converter
PSI, bar, Pa, atm, Torr (mmHg), inHg, mbar.
New
Energy Converter
cal, kcal, J, kJ, Wh, kWh, BTU, eV.
New
Cooking Converter
Cups, tablespoons, teaspoons, mL. US and metric.
New
Fuel Economy Converter
MPG (US/UK), L/100km, km/L. Non-linear math handled.
New
Marla to Square Feet
Pakistani Marla, Kanal, acre, sq ft. 1 Marla = 272.25 sq ft.
New
Tola to Grams
Gold weight. 1 Tola = 11.6638 grams. Pakistan, India.
New
USD to PKR
US Dollar to Pakistani Rupee, live rate.
New
SAR to PKR
Saudi Riyal to Pakistani Rupee, live rate.
New
AED to PKR
UAE Dirham to Pakistani Rupee, live rate.
New
GBP to PKR
British Pound to Pakistani Rupee, live rate.
New
EUR to PKR
Euro to Pakistani Rupee, live rate.
New
USD to INR
US Dollar to Indian Rupee, live rate.
New
USD to BDT
US Dollar to Bangladeshi Taka, live rate.
New
Temperature Converter
Celsius, Fahrenheit, and Kelvin. All three scales at once.
Hub
Kg to Lbs
Kilograms to pounds with body weight table and airline luggage limits.
Lbs to Kg
Pounds to kilograms with US weight reference and baby weight chart.
Kg to Pounds
Kg to pounds for grocery, cooking, and food labels.
New
Pounds to Kg
Formal pounds to kg with postal, customs, and medical context.
New
Celsius to Fahrenheit
Celsius, Fahrenheit, Kelvin with cooking temps and body temperature reference.
Fahrenheit to Celsius
F to C with US oven temperatures, weather, and fever reference.
Cm to Inches
Centimeters to inches with height chart and clothing sizes.
Inches to Cm
Inches to cm with US height chart, jeans waist sizes, and TV screens.
Cm to Feet
Height conversion: centimeters to feet and inches. 150 to 200 cm.
New
Feet to Cm
US height to metric. 5 feet to 6 feet 6 inches with cm values.
New
Km to Miles
Kilometers to miles with running race distances (5K, 10K, marathon).
Miles to Km
Miles to km with US road trips, speed limits, and race distances.
Feet to Meters
1 foot = 0.3048 m exactly. Quick reference table.
New
Meters to Feet
1 m = 3.281 ft. Heights and engineering specs.
New
Grams to Ounces
1 oz = 28.35 g. Cooking and nutrition labels.
New
Ounces to Grams
1 oz = 28.35 g. Recipe conversions.
New
Celsius to Kelvin
Add 273.15. Science and photography color temperature.
New
Kelvin to Celsius
Subtract 273.15. Reverse direction.
New
Timezone Converter
Meeting planner. Compare cities with DST handled automatically.

👨‍💻 Developer 6 tools

Developer utilities that save you from opening Stack Overflow for the fifth time today. Format, validate and minify JSON, encode and decode Base64, URL, and HTML entities, test regular expressions with live match preview and a cheat sheet, and pick colors across HEX, RGB, HSL, and OKLCH formats with Tailwind export and WCAG contrast checks.

⏱️ Time & Date 3 tools

Time and date tools for planning, counting down, and figuring out exactly how old something is. Calculate age in days, hours and minutes, run a Pomodoro focus timer, and create shareable countdown timers for launches, birthdays, or any event with a fixed deadline.

Frequently asked questions about Gizmoop tools

Common questions before you pick a tool.

Yes, every tool listed here is completely free with no usage limits, no signup required, and no paywall. You can use them as much as you want without creating an account or providing payment details. We support the site with a small number of unobtrusive ads displayed around the content, never inside the tools.

No, every tool works the moment you open it. There is no signup wall, no email verification, no captcha, and no "log in with Google" prompt. Your work auto-saves locally in your browser, so you can pick up where you left off without ever creating a profile.

No, every tool on Gizmoop runs entirely in your browser using JavaScript. Your text, images, and files never travel over the network to our servers, nothing is uploaded, logged, or stored on our infrastructure. If you close the tab, your work is gone, that is by design for privacy.

We currently offer 130+ free online tools across six categories: text and writing, image and photo, calculators, converters, developer utilities, and time and date tools. We ship at least one new tool every week based on community requests, so the count grows steadily.

Yes, every tool is responsive and touch-friendly with tap targets sized for thumbs. The layout reflows for small screens, and the most important controls stay visible without scrolling. Many tools work offline once the page is loaded, which is useful on flights or with spotty connections.

Absolutely, send your idea to gizmoopofficial@gmail.com or use our contact form. We read every message personally and most weeks we ship at least one community-suggested tool. Bug reports also get priority over feature requests, so please flag anything broken with a screenshot if you can.