Help Center

Need a hand? Start with the common questions below, or jump straight to a tool's own guide.

Accounts & limits

You can use any tool free once per day. Create a free account to unlock higher daily limits, save your history, and sync across devices. It's free forever and takes a few seconds.

Is my data private?

Most tools run entirely in your browser, so your files never leave your device. See our Privacy Policy for full details on what we collect and why.

Tool guides

• Word Counter — Live word, character & reading-time counts with writing analytics.
• Age Calculator — Your exact age in years, months, days — plus a birthday countdown.
• BMI Calculator — Body Mass Index with a healthy-range chart and clear guidance.
• Password Generator — Strong, random passwords with a crack-time estimate — generated locally.
• QR Code Generator — Custom QR codes with colors — download PNG or SVG, no expiry.
• Background Remover — Remove image backgrounds in one click — free, HD, on your device.
• Case Converter — Convert text to 13 cases at once — Title, camelCase, snake_case & more.
• JSON Formatter — Beautify, minify & validate JSON — with one-click auto-repair.
• Base64 Encode / Decode — Encode & decode Base64 — text or files, URL-safe, with image preview.
• Hash Generator — SHA-1/256/384/512 for text or files — plus one-click hash verify.
• URL Encoder / Decoder — Encode & decode URLs — plus a live query-parameter breakdown.
• Color Converter — HEX ↔ RGB ↔ HSL with WCAG contrast checker + shades & tints.
• Unit Converter — Convert length, weight, temperature & more — every unit at once.
• Lorem Ipsum Generator — Placeholder text in 4 flavors — classic, hipster, tech & corporate.
• Percentage Calculator — Every percentage question — of, is-what-%, change, add/subtract.
• Loan & EMI Calculator — Monthly payment, total interest & full amortization schedule.
• Tip Calculator — Tip, total & split-the-bill per person — with round-up.
• Timestamp Converter — Unix ↔ human date, both ways, with a live clock & relative time.
• Markdown to HTML — Live Markdown preview + clean, copy-ready HTML side by side.
• Text Diff Checker — Compare two texts, highlight changes & get a similarity score.
• BMR Calculator — Your resting metabolism (Mifflin-St Jeor) + maintenance calories.
• Calorie Calculator — Daily calories to maintain, lose or gain weight — with goal targets.
• Water Intake Calculator — How much water to drink daily — from weight, activity & climate.
• Body Fat Calculator — Estimate body-fat % with the US Navy tape method — no scale needed.
• Ovulation Calculator — Ovulation day, fertile window & your next periods.
• Sleep Cycle Calculator — The best time to sleep or wake — timed to 90-min cycles.
• One-Rep Max Calculator — Estimate your 1RM + a full %-of-max training chart.
• Macro Calculator — Turn a calorie target into protein, carb & fat grams.
• Running Pace Calculator — Pace per km/mile + projected 5K, 10K, half & marathon times.
• TDEE Calculator — Total daily energy expenditure — the calories you actually burn.
• Calorie Deficit Calculator — Daily calories & timeline to reach your goal weight safely.
• Heart Rate Zone Calculator — Your 5 training zones from age (+ resting HR for accuracy).
• Profit Margin Calculator — Gross profit, margin % and markup % from price and cost.
• Break-even Calculator — How many units to sell to cover your costs.
• ROI Calculator — Return on investment %, net profit & annualized return.
• Markup & Pricing Calculator — Set the right selling price from cost + target margin.
• Sales Tax & VAT Calculator — Add or remove sales tax / VAT from any amount.
• Cash Runway Calculator — How many months of cash you have left — and when it runs out.
• Freelance Rate Calculator — The hourly rate you must charge to hit your income goal.
• Invoice Generator — Make a clean invoice and download it as a PDF — no signup.
• Project Quote Estimator — Price a project from tasks + rate, with a safety buffer & PDF.
• Freelance Time Tracker — One-tap start/stop timers that turn hours into billable dollars.
• Self-Employment Tax Calculator — See what to set aside each quarter so tax season never stings.
• Freelance Contract Generator — A fair, plain-English client contract you can send in minutes.
• Readability Checker — Flesch score, grade level and instant tips to write clearer.
• Headline Analyzer — Score your headline and get instant tips to earn more clicks.
• Pomodoro Timer — Focus in 25-minute sprints with automatic breaks and a chime.
• Countdown Timer — Count down to any date — launches, birthdays, deadlines.
• To-Do List — A fast, private checklist with drag-to-reorder and progress.
• Habit Tracker — Tick off daily habits and watch your streaks catch fire.
• Decision Wheel — Can't decide? Add your options and let the wheel pick.
• Meeting Cost Calculator — See what a meeting really costs — with a live money meter.
• Color Contrast Checker — Check WCAG contrast so your text is readable by everyone.
• CSS Gradient Generator — Design a gradient visually and copy the CSS in one click.
• Color Palette Generator — Turn one colour into a harmonious 5-colour palette.
• Body Shape Calculator — Find your body shape and get styling tips that flatter it.
• Clothing Size Converter — Convert US, UK, EU and IT/AU clothing sizes instantly.
• Bra Size Calculator — Two measurements, your US/UK/EU size and a fit tip.
• Shoe Size Converter — US, UK, EU and CM shoe sizes for women and men.
• Capsule Wardrobe Planner — See how many outfits a few mix-and-match pieces create.
• Outfit Generator — Beat 'nothing to wear' — instant outfit ideas by occasion.
• Skin Undertone Finder — Warm, cool or neutral? A quick quiz settles it.
• Skin Type Quiz — Oily, dry, combo, normal or sensitive — plus a routine.
• Color Season Analysis — Spring, Summer, Autumn or Winter — find your best colours.
• Skincare Routine Order — Tick your products, get the right order for AM and PM.
• Skincare Ingredient Checker — Which actives clash? Check before you layer them.
• Foundation Shade Finder — Undertone + depth = your foundation shade family.
• PDF Reader — Open and read any PDF in your browser — private, no upload.
• Merge PDF — Combine PDFs into one — reorder pages, download instantly.
• Split PDF — Pull out the pages you need into a fresh PDF.
• Images to PDF — Turn JPGs and PNGs into a single PDF — reorder as you like.
• PDF to Images — Render each PDF page to a crisp PNG you can download.
• Rotate PDF — Fix sideways or upside-down PDF pages and download.
• Image Resizer — Resize photos by pixels or percentage, aspect-locked.
• Image Compressor — Shrink image file size with a live quality preview.
• Image Cropper — Crop photos with drag handles and aspect-ratio presets.
• Image Format Converter — Convert between PNG, JPG and WebP in a click.
• Rotate & Flip Image — Straighten, rotate or mirror an image and download.
• Image Color Picker — Grab exact hex colors from any photo or screenshot.
• Discount Calculator — Sale price, savings and tax — worked out instantly.
• Email Signature Generator — A clean, professional email signature you can paste anywhere.
• UTM Link Builder — Build trackable campaign URLs for Google Analytics.
• ROAS Calculator — Return on ad spend, ACoS and break-even in one view.
• CAC & LTV Calculator — Customer acquisition cost vs lifetime value — is it healthy?
• Conversion Rate Calculator — Conversion %, revenue per visitor and what-if targets.
• Bill Splitter — Split the bill with tip — fairly, in seconds.
• GPA Calculator — Add your courses and grades — get your GPA instantly.
• Final Grade Calculator — What score do you need on the final to hit your goal?
• Date Difference Calculator — Days, weeks, months and years between two dates.
• Time Zone Meeting Planner — Find a meeting time that works across time zones.
• Fuel Cost Calculator — What a trip costs in fuel — split it with passengers.
• Online Notepad — A distraction-free notepad that autosaves in your browser.
• Find & Replace Text — Bulk find and replace — with regex and live match count.
• Remove Line Breaks — Clean up messy line breaks and spacing in one click.
• Remove Duplicate Lines — Dedupe any list — case options, trim and sort included.
• Sort & Alphabetize Lines — Alphabetize, sort numerically, reverse or shuffle any list.
• Social Character Counter — Live character limits for every platform at once.

Still stuck?

Email us at support@toolplaza.cloud and we'll help.