Free Website Widgets by A2Z Tools

Monthly instalment, total interest and total repayment for any loan.

Payment, total interest and payoff date for any loan, with monthly, biweekly or weekly payments.

Monthly mortgage payment with property tax, insurance, HOA dues and PMI broken out.

Estimated value of a monthly SIP, with an optional yearly step-up.

Convert between 54 currencies with live reference rates and the rate shown both ways.

Add or remove Indian GST at the rate you choose, split into CGST + SGST or IGST.

Pretty-print, minify or validate JSON, with the line and column of the first syntax error.

A live badge showing that your SSL certificate is valid, trusted and how many days it has left.

Let visitors check any domain's SSL certificate: validity, expiry, issuer and trust.

Enter any two of voltage, current, resistance and power to get the other two.

Volts and percent lost along a copper or aluminium cable, for DC, single-phase and three-phase runs.

How long a battery runs a load, from Ah, voltage, depth of discharge and efficiency.

Panels and system kW needed to cover your energy use, from your own peak sun hours.

X% of Y, X as a percent of Y, and the percentage change between two values.

Length, mass, volume, area, temperature, speed, time, data, pressure, energy and power - exact factors.

Live days, hours, minutes and seconds to a date you set, with an "event has started" message.

Exact age in years, months and days, totals in months, weeks and days, and the next birthday.

Convert a date and time between any two time zones, with daylight-saving gaps and overlaps explained.

Live local time, date and UTC offset for up to 12 cities you choose.

Body mass index with the WHO adult category and the healthy weight range for a height.

Turn any link or text into a QR code, pick colours and error correction, download PNG or SVG.

Monthly instalment, total interest and total repayment for any loan.

Monthly mortgage payment with property tax, insurance, HOA dues and PMI broken out.

Estimated value of a monthly SIP, with an optional yearly step-up.

Convert between 54 currencies with live reference rates and the rate shown both ways.

Profit, gross margin and markup from cost and price - or the price for a target margin.

Sale price and savings, including stacked discounts and sales tax on the reduced price.

Add or remove Indian GST at the rate you choose, split into CGST + SGST or IGST.

Tip, total and each person's share of a bill, with an option to round shares up.

Return on ad spend as a multiple and a percentage, with break-even ROAS from your margin.

Cost per click plus CTR, CPM, conversion rate and CPA from one campaign's totals.

Tag a URL with UTM campaign parameters, keeping its query and #fragment, then copy it.

Pretty-print, minify or validate JSON, with the line and column of the first syntax error.

Build a quick price quote from up to 8 line items with discount and tax, then copy it as text.

What you receive after a percentage-plus-fixed processing fee, or what to charge to receive a set amount.

Monthly instalment, total interest and total repayment for any loan.

Payment, total interest and payoff date for any loan, with monthly, biweekly or weekly payments.

Monthly mortgage payment with property tax, insurance, HOA dues and PMI broken out.

Future value of a lump sum and monthly contributions at any compounding frequency.

Estimated value of a monthly SIP, with an optional yearly step-up.

Convert between 54 currencies with live reference rates and the rate shown both ways.

Simple interest and total amount for a period in years, months or days.

Fixed deposit maturity value, or the monthly or quarterly interest payout.

Projected retirement savings against what an inflation-linked income needs.

How much to save each month to reach a goal by a date, counting interest.

What something will cost in future, and what today's cash will be worth, at a rate you choose.

Compound annual growth rate between a starting and an ending value.

Return on investment as a percentage, plus the annualised figure when you add the period.

How long a card balance takes to clear and what it costs, or the payment to clear it by a date.

Avalanche versus snowball for up to five debts: months to debt-free and total interest.

The home price an income supports under the 28/36 debt-to-income rule.

Compare net worth after renting or buying over the years you plan to stay.

Gross and net rental yield after vacancy and running costs.

Capitalization rate from income and price, or the value at a target cap rate.

Down payment, loan amount, LTV and total cash needed to buy a home.

Maximum home-loan EMI and loan amount from net income using the FOIR method.

Total floor area of up to six rectangles, circles and triangles in sq ft and square metres.

Convert land and floor area between sq ft, sq m, gaj, acres, hectares, cents, guntha and more.

Paint needed for a room after doors and windows, rounded up to real can sizes.

Profit, gross margin and markup from cost and price - or the price for a target margin.

Selling price from cost plus markup, or work back to the cost or the markup you applied.

Sale price and savings, including stacked discounts and sales tax on the reduced price.

Units and revenue needed to cover fixed costs, plus the sales needed for a profit target.

Add or remove Indian GST at the rate you choose, split into CGST + SGST or IGST.

Add VAT to a net price or extract it from a gross price, at a UK rate or any rate you type.

US-style sales tax from the state and local rates you enter, or the tax hidden in a tax-inclusive total.

Tip, total and each person's share of a bill, with an option to round shares up.

Build a quick price quote from up to 8 line items with discount and tax, then copy it as text.

What you receive after a percentage-plus-fixed processing fee, or what to charge to receive a set amount.

Minimum hourly and day rate from the income you want, your costs, tax and billable hours.

Return on ad spend as a multiple and a percentage, with break-even ROAS from your margin.

Solve CPM, campaign cost or impressions from the other two.

Cost per click plus CTR, CPM, conversion rate and CPA from one campaign's totals.

Conversion rate from visitors and conversions, with an optional A/B comparison and z-test.

Social media engagement rate by followers and by reach, for one post or several.

Tag a URL with UTM campaign parameters, keeping its query and #fragment, then copy it.

Pretty-print, minify or validate JSON, with the line and column of the first syntax error.

Convert a JSON array of objects to CSV and CSV back to JSON, with RFC 4180 quoting.

Encode text to Base64 or decode it, with proper UTF-8 and an optional URL-safe alphabet.

Percent-encode or decode text and URLs, and find the exact position of a malformed escape.

Read a JSON Web Token's header and claims, with exp, nbf and iat shown as dates.

Generate 1 to 100 random v4 or time-ordered v7 UUIDs in several formats.

Live epoch time, timestamp to date (seconds to nanoseconds detected) and date to timestamp.

Test a JavaScript regular expression: highlighted matches, capture groups and a replace preview.

Turn a cron schedule into plain English and list its next five run times.

MD5, SHA-1, SHA-256, SHA-384 and SHA-512 of any text, in hex or Base64.

Live Markdown preview with tables and task lists, plus safe HTML to copy.

Network, broadcast, host range, masks and host count for any IPv4 CIDR, with subnet splitting.

Words, characters, sentences, paragraphs, reading time and social-media character limits.

Preview a title, URL and meta description as a Google-style result, with pixel-width estimates.

Preview Facebook, LinkedIn and X link cards and generate the Open Graph meta tags.

Turn a title into a clean URL slug: accents transliterated, optional stop-word removal and length cap.

Top one-, two- and three-word phrases in a text with counts and density, plus a focus keyword.

Check whether a robots.txt allows a crawler to fetch a URL, and which rule decides it (RFC 9309).

Reading and speaking time for a word count or pasted text, at research-based reading speeds.

Flesch, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau and ARI scores for English text.

Title Case, Sentence case, UPPER, lower, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE.

Placeholder text by paragraphs, sentences or words, as plain text or HTML paragraphs.

Compare two versions of a text line by line or word by word, with additions and removals marked.

Enter a URL to see its HTTP status code and every redirect hop.

A live badge showing that your SSL certificate is valid, trusted and how many days it has left.

A badge counting down the days until your SSL certificate expires.

Shows whether your site serves HTTPS and redirects plain-HTTP visitors to it.

Shows whether your site sends HTTP Strict Transport Security, with max-age and preload.

Counts how many of six key HTTP security headers your site sends - e.g. "5 / 6".

Shows whether your domain publishes an SPF record and how it ends (-all, ~all).

Shows your domain's DMARC policy - p=reject, p=quarantine or p=none.

Shows whether your domain is DNSSEC-signed and validates.

A live online/offline badge for any website, re-checked every five minutes.

Estimates password strength from length and common patterns - checked entirely in the browser.

Let visitors check any domain's SSL certificate: validity, expiry, issuer and trust.

Shows the visitor's browser, OS, screen, language, time zone and other settings - read locally.

Visitors enter a domain and see which of six key security headers it sends.

Checks a domain's SPF and DMARC records and DNSSEC status in one go.

Shows the visitor's public IPv4 or IPv6 address as A2Z sees it, with a copy button.

Enter any two of voltage, current, resistance and power to get the other two.

Watts, volt-amps and amps for DC and single-phase AC circuits, with power factor.

kW, kVA and kVAR from line voltage, current and power factor - or the current from kW or kVA.

Volts and percent lost along a copper or aluminium cable, for DC, single-phase and three-phase runs.

Convert AWG to mm2, diameter in mm and inches, circular mils and copper resistance.

Output voltage of a two-resistor divider, or the R2 needed for a target voltage, with an optional load.

Series resistor for one LED or a string: standard E12/E24 value, real current and power rating.

Read 4, 5 and 6-band resistor colour codes, or find the bands for a value.

Equivalent of up to 8 resistors or capacitors in series or in parallel.

kVA, kVAR and phase angle from kW and power factor, plus the capacitor kVAR to reach a target.

How long a battery runs a load, from Ah, voltage, depth of discharge and efficiency.

Backup time of a home inverter or UPS battery bank, or the battery Ah needed for the hours you want.

Panels and system kW needed to cover your energy use, from your own peak sun hours.

Daily, monthly and yearly running cost of up to 8 appliances at your tariff.

X% of Y, X as a percent of Y, and the percentage change between two values.

A clean on-screen calculator with keyboard support, correct operator precedence and percent.

Trig in degrees or radians, logs, roots, powers, factorials, pi, e and Ans - typed or tapped.

Add, subtract, multiply and divide fractions and mixed numbers, with the simplified answer.

Mean, median, mode, range, variance, standard deviation and quartiles of any list of numbers.

Credit-weighted GPA for a term, plus the new cumulative GPA when you add prior results.

The score you need on the final exam to reach a target grade, plus best and worst cases.

Real or complex roots of ax^2 + bx + c = 0, with the discriminant, vertex and axis of symmetry.

Numbers 1-3999 to Roman numerals and back, with strict checking and a symbol-by-symbol breakdown.

Binary, octal, decimal, hex and any base from 2 to 36 - exact for very large integers.

Length, mass, volume, area, temperature, speed, time, data, pressure, energy and power - exact factors.

Celsius, Fahrenheit, Kelvin and Rankine in one step, with the formulas shown.

Live days, hours, minutes and seconds to a date you set, with an "event has started" message.

Exact age in years, months and days, totals in months, weeks and days, and the next birthday.

Convert a date and time between any two time zones, with daylight-saving gaps and overlaps explained.

A large live digital clock for any time zone, with seconds, date and a 12/24-hour switch.

Live local time, date and UTC offset for up to 12 cities you choose.

Years, months and days between two dates or date-times, plus totals in days, weeks and hours.

Count working days between dates or add N business days, with your weekend and holidays.

A classic clock face with hour, minute and second hands for your zone or any city.

A keyboard-friendly month calendar with today highlighted and your own marked dates.

Shows Open now or Closed and when you open next, in your business's own time zone.

A slim banner with your offer headline, a live countdown and an optional Shop now button.

Sunrise, sunset, solar noon, day length and twilight for any place and date.

Today's Moon phase drawn to scale, with illumination, age and the next full and new moon.

Fajr, Sunrise, Dhuhr, Asr, Maghrib and Isha for any place, with the major calculation methods.

Fuel needed and trip cost from distance, economy and fuel price, split between passengers.

Convert between MPG (US), MPG (UK), L/100 km and km per litre with exact factors.

Monthly car payment with down payment, trade-in, sales tax and fees, plus the total cost.

Cost and energy to charge an electric car between two battery levels, with charging losses.

Diameter, sidewall and revolutions of a tyre size, and the speedometer error of a new size.

Solve speed, distance or time from the other two, in km, miles, metres or nautical miles.

Trip total, per person and per day from stay, food, transport, activities, flights and a buffer.

A car's estimated value year by year, by declining balance or straight line.

Body mass index with the WHO adult category and the healthy weight range for a height.

Basal metabolic rate from Mifflin-St Jeor or the revised Harris-Benedict equation.

Maintenance calories (TDEE) and daily targets for gradual weight loss or gain.

Body fat percentage from tape measurements with the US Navy method, plus ACE category.

Devine, Robinson, Miller and Hamwi ideal weights side by side, with the healthy BMI range.

An estimated daily fluid range from body weight and exercise time, from published guidance.

Daily grams of protein, carbohydrate and fat from calories and a macro split.

Estimated due date, weeks pregnant, trimester and key dates from LMP, conception or IVF.

Estimated ovulation day and fertile window for the next three cycles.

Estimated max heart rate and five training zones, with optional Karvonen zones.

Pace per km and per mile from distance and time, or finish time from a target pace.

Estimated 1RM from a set of 1-12 reps by Epley and Brzycki, with a training-load table.

WCAG 2.x contrast ratio of two colours, AA/AAA results and the nearest passing shade.

Convert any colour between HEX, RGB, HSL, HSV and CMYK, with a swatch and copy buttons.

Build a linear or radial CSS gradient with 2-5 colour stops and copy the code.

Complementary, analogous, triadic, split, tetradic and monochrome palettes from one colour.

Simplify width x height to a ratio and resize to a new width or height without distortion.

Convert pixels to rem (and back) for any root font size, with a table of common sizes.

Turn any link or text into a QR code, pick colours and error correction, download PNG or SVG.

Strong random passwords from 8 to 128 characters, with the entropy of each shown in bits.

A QR code guests scan to join your Wi-Fi without typing the password.

A UPI payment QR code for any UPI ID, with an optional fixed amount and note.

Put name, phone, email, website and address in a QR code that saves as a phone contact.

Fair random numbers in any range - whole or decimal, with or without repeats, sorted if you like.