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New✅ ValidationCosta Rica ID number validatorEnter 1-0234-0567 and you learn it is a valid personal cédula, stored as 102340567 and shown in its usual hyphenated…NNitroRuns in your browserFreeOpen →New💰 Finance & moneyCosta Rica severance calculatorThirty months on an average ₡600,000, then a dismissal without just cause: the settlement comes to ₡2,040,000 in notice…NNitroRuns in your browserFreeOpen →New💰 Finance & moneyCosta Rica employer payroll charges 2026A ₡1,000,000 monthly salary costs a Costa Rican employer ₡1,268,300 in 2026, because ₡268,300 in social charges, the…NNitroRuns in your browserFreeOpen →New💰 Finance & moneyCosta Rica net salary calculator 2026On ₡1,000,000 gross a month, an employee in Costa Rica takes home ₡883,500 in 2026: ₡108,300 goes to the CCSS and ₡8,200…NNitroRuns in your browserFreeOpen →New💰 Finance & moneyCosta Rica aguinaldo calculatorYour aguinaldo is one twelfth of everything earned from 1 December to 30 November: twelve months at ₡600,000 come to an…NNitroRuns in your browserFreeOpen →New➗ MathNull space calculatorThe rows (1, 2, 3) and (2, 4, 6) have rank 1, so their null space needs two basis vectors: (−2, 1, 0) and (−3, 0, 1).SsamuraiRuns in your browserFreeOpen →New➗ MathLogical NOR calculatorFalse NOR false is true, and every other pair gives false. Enter two true-or-false values and get the NOR result with…PPavilionRuns in your browserFreeOpen →New➗ MathMultiply complex numbersMultiply two complex numbers in rectangular form: (1 + 2i)(3 + 4i) gives −5 + 10i, using (ac − bd) + (ad + bc)i with i²…AabuelaRuns in your browserFreeOpen →New➗ MathMöbius strip calculatorGive the band width and the centreline radius and get the Möbius strip's area and its single edge: a band 1 wide on a…SsamuraiRuns in your browserFreeOpen →New➗ MathLong multiplication calculatorMultiply two whole numbers the schoolbook way and see every partial product: 123 times 45 gives the rows 615 and 4920…AabuelaRuns in your browserFreeOpen →New➗ MathMean calculatorAdd up a list and divide by how many numbers it holds: 2, 4, 6, 8 and 10 sum to 30, so the mean is 6.PPavilionRuns in your browserFreeOpen →New➗ MathLog2 calculatorEnter a positive number and get its base-2 logarithm, the power of two that produces it: log2 of 8 is 3, of one half is…SsamuraiRuns in your browserFreeOpen →

Popular capabilities

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#1📈 SEOValidate a redirect mapCatch redirect mistakes while the map is still a file: in /a → /b → /c → /d, the route from /a takes three hops and is…GGalaRuns in your browserFreeOpen →#2📄 Documents & PDFConvert HTML to PDFTurn an invoice template or a rendered report written in HTML into a PDF that looks exactly like the page a modern…NNitroAPI$0.040Open →#3📄 Documents & PDFJPG to PDFThree photos of a damaged part, or several receipts snapped on a phone, become one PDF with one page per image, in the…NNitroAPI$0.002Open →#4📄 Documents & PDFURL to PDFKeep a competitor's advertised claims, a government notice or a partner's terms exactly as they appeared on a given…NNitroAPI$0.040Open →#5🌐 TranslationSort a list alphabeticallyWith Spanish rules, “nandu” comes before “ñandú” and “Ñoño”, and “Ángel” sits right after “angel” instead of at the end…GGalaRuns in your browserFreeOpen →#6✅ ValidationValidate a phone numberType +34 600 11 12 22 and you get +34600111222, confirmed as a valid Spanish number of 11 digits, ready for your contact…NNitroRuns in your browserFreeOpen →#7✅ ValidationColor contrast checkerKnow whether text will stay readable for everyone, whatever your own screen shows: dark gray #111827 on white has a…GGalaRuns in your browserFreeOpen →#8🖼️ ImagesAdd a logo to a QR codeAdd your logo to the center of a QR code without breaking it: the error-correction level, the logo's size and the blank…NNitroRuns in your browserFreeOpen →#9🕸️ Web Scraping & MonitoringRemove tracking parameters from a URLTwo UTM tags gone, the id parameter kept and nothing else in the link touched: paste a link to strip known tracking…GGalaRuns in your browserFreeOpen →#10📄 Documents & PDFSplit a PDFCut a three-page PDF every two pages and you get two files: pages 1 and 2, then page 3.NNitroAPI$0.002Open →#11📄 Documents & PDFExtract text from a PDFGet the words a native PDF already contains as plain text in reading order, without fonts, columns or coordinates…NNitroAPI$0.002Open →#12✍️ Text & AISummarize a textNobody on your team has to skim a 4,000-word document again to find the three sentences that matter: paste it in and get…NNitroAPI$0.003Open →

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💰 Finance & moneyFree
Retention ratio calculator
Net income of 100,000 and dividends of 40,000 leave 60,000 retained, a retention ratio of 0.6, or 60%. See how much of the period's profit stays in the company.
PPavilion
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Revenue calculator
Selling 250 units at 19.99 each brings in total revenue of 4,997.5. Turn a unit count and a selling price into one top-line figure before you open a full income…
PPavilion
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💰 Finance & moneyFree
Revenue growth calculator
Revenue that rose from 100,000 to 120,000 grew by 20%, an increase of 20,000 over the previous period.
Aabuela
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💰 Finance & moneyFree
Revenue per employee calculator
A company with revenue of 5,000,000 and 25 employees generates 200,000 of revenue per employee. Set that productivity figure against peers, last year or pay per…
Ssamurai
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💰 Finance & moneyFree
ROA calculator
Net income of 80,000 on total assets of 1,000,000 gives a return on assets of 8%. Compare how efficiently companies of different sizes turn their assets into…
PPavilion
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💰 Finance & moneyFree
ROAS calculator
Ads that cost 1,000 and brought in 4,000 of attributed revenue have a ROAS of 4: four units of revenue for every unit spent.
Aabuela
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💰 Finance & moneyFree
ROIC calculator
NOPAT of 150,000 on invested capital of 1,000,000 gives a return on invested capital of 15%, or 0.15.
Ssamurai
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💰 Finance & moneyFree
Roth IRA calculator
Put 6,500 into a Roth IRA every year for 30 years at 7% and the balance reaches 613,995.11, of which 418,995.11 is tax-exempt growth.
PPavilion
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💰 Finance & moneyFree
RSI calculator
Fifteen daily closes with the standard 14-period lookback give an RSI just over 70, which lands in the overbought band.
Aabuela
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💰 Finance & moneyFree
RV loan calculator
Financing 85,000 on a motorhome at 6.99% over 180 months means 763.53 a month. Enter the amount after your down payment, the APR and the months on each dealer…
Ssamurai
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💰 Finance & moneyFree
SaaS metrics calculator
200 subscribers paying 49 a month with 10 cancellations give MRR of 9,800, a 5% churn rate and a customer lifetime value of 980.
PPavilion
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💰 Finance & moneyFree
Safety stock calculator
Peak usage of 50 units a day over a 14-day worst lead time, against 30 a day over 10 typical days, calls for 400 units of safety stock.
Ssamurai
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💰 Finance & moneyFree
Salary inflation calculator
At 3% inflation, a 50,000 salary has to grow to 57,963.70 in five years just to buy what it buys today, a gap of 7,963.70.
Aabuela
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💰 Finance & moneyFree
Sales calculator
A sale of 100 at 8.25% carries 8.25 in tax, so the customer pays 108.25. Enter the amount before tax and the rate you already know, and get both figures for a…
Ssamurai
Runs in your browser
💰 Finance & moneyFree
Sales commission calculator
Five percent of a 10,000 sale is 500, and a 250 contest bonus on top makes the commission 750. Enter the sale, the agreed rate and an optional flat bonus, and…
Aabuela
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💰 Finance & moneyFree
Savings calculator
Start with 1,000, add 100 a month at 5% for 10 years and the balance reaches 17,175.24: 13,000 of your own money and 4,175.24 of interest.
PPavilion
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💰 Finance & moneyFree
Savings plan calculator
A plan of 1,000 up front and 100 a month at 5% for 10 years ends at 17,175.24, of which 4,175.24 is interest on the 13,000 you deposit.
PPavilion
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💰 Finance & moneyFree
Savings withdrawal calculator
12,000 with 1,000 taken out each month at 0% lasts exactly 12 months. Add your balance, the monthly withdrawal and the interest rate, and see when the account…
Ssamurai
Runs in your browser
💰 Finance & moneyFree
Scrap gold calculator
Ten grams of 18-karat gold hold 7.5 grams of pure gold, worth 600 at a quote of 80 per gram. Enter the weight, the karat stamp and the price you were quoted to…
Aabuela
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💰 Finance & moneyFree
UK SDLT calculator
A 400,000 pound home bought as a standard purchase owes 10,000 pounds in stamp duty, an effective 2.5%.
PPavilion
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💰 Finance & moneyFree
Second stimulus check calculator
A single filer with 50,000 of adjusted gross income and one qualifying child was due the full 1,200 dollars from the second stimulus round.
Aabuela
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💰 Finance & moneyFree
Semi-monthly pay calculator
An annual salary of 72,000 paid twice a month gives 24 gross checks of 3,000 each, or 6,000 a month.
Ssamurai
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💰 Finance & moneyFree
Simple mortgage calculator
A 250,000 mortgage at 6.5% over 30 years costs 1,580.17 a month in principal and interest. Enter the amount, rate and term to compare quotes on the figure that…
Aabuela
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💰 Finance & moneyFree
Simple savings calculator
Open with 1,000, add 100 every month at 5% interest and after 10 years the account holds 17,175.24, including 4,175.24 of interest.
Ssamurai
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💰 Finance & moneyFree
SIP India calculator
A SIP of 5,000 a month at an expected 12% for 10 years grows to 1,161,695.38 on 600,000 invested. Each installment counts from the start of the month, the…
PPavilion
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💰 Finance & moneyFree
Software contract value calculator
A license at 499 a month for 12 months with a 1,500 setup has a total contract value of 7,488, of which 5,988 is subscription.
Aabuela
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💰 Finance & moneyFree
Spending multiplier calculator
With a marginal propensity to consume of 0.8 the multiplier is 5, so an injection of 100 lifts equilibrium output by 500.
Ssamurai
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💰 Finance & moneyFree
SSY calculator
Depositing 150,000 a year for 15 years at 8.2% builds an SSY account worth 7,182,119.17 when it matures at year 21, on 2,250,000 paid in.
PPavilion
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💰 Finance & moneyFree
State income tax calculator
With brackets of 2%, 4%, 6% and 8%, a taxable income of 80,000 owes 3,800 in state tax, an effective 4.75% even though the last dollar pays 6%.
Aabuela
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💰 Finance & moneyFree
HEALS Act stimulus check calculator
Under the HEALS Act proposal, a single filer with 40,000 of adjusted gross income and one dependent would have received the full 1,700: 1,200 for the adult plus…
Ssamurai
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💰 Finance & moneyFree
HEALS vs HEROES stimulus calculator
A single filer with 50,000 of income and two dependents would have received 2,200 under the Senate's HEALS Act and 3,600 under the House's HEROES Act, a gap of…
PPavilion
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💰 Finance & moneyFree
Stock profit calculator
Buying 100 shares at 50 and selling at 65 with 9.95 in fees leaves a net gain of 1,490.05, a return of 29.7418% on the cash you put in.
Aabuela
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💰 Finance & moneyFree
Stock average calculator
100 shares bought at 10 plus 50 shares at 16 cost 1,800 for 150 shares, an average of 12 per share, because the bigger lot pulls the average toward its own…
Ssamurai
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💰 Finance & moneyFree
Stock split calculator
After a 2-for-1 split, 100 shares at 50 become 200 shares at 25, and the position is still worth 5,000.
PPavilion
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💰 Finance & moneyFree
Student loan forgiveness calculator
On an 80,000 balance with 55,000 of income and a household of two, 20 years of payments at 193.96 a month total 46,550, leaving 33,450 to be forgiven.
Aabuela
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💰 Finance & moneyFree
Subscription waste calculator
A 15.99 monthly plan nobody used for 4 months wastes 63.96 a year, and this calculator does that sum for every subscription you list.
Ssamurai
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💰 Finance & moneyFree
Sustainable growth rate calculator
A 15% return on equity with 60% of earnings retained gives a sustainable growth rate of 9%, the pace a company can keep without issuing new shares.
PPavilion
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💰 Finance & moneyFree
Tax bracket calculator
With 50,000 of taxable income and a table that taxes 10%, 12% and then 22%, you are in the 22% bracket yet owe 6,800, an effective rate of 13.6%.
Aabuela
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💰 Finance & moneyFree
TDS on interest calculator
On 50,000 of interest with 10% TDS, 5,000 is withheld and 45,000 net reaches your account. Enter the gross interest and the rate from your bank advice to see…
Ssamurai
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💰 Finance & moneyFree
Tenure calculator
From 1 March 2018 to 20 August 2024 is 6 years, 5 months and 19 days, or 2,364 days in total. Enter a hire or start date and an as-of date to get length of…
PPavilion
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💰 Finance & moneyFree
Texas sales tax calculator
A purchase of 100 at the 8.25% combined rate common in Houston or Dallas carries 8.25 in tax, for a total of 108.25.
Aabuela
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💰 Finance & moneyFree
Time and a half calculator
At 20 an hour, 40 regular hours plus 5 overtime hours paid at time and a half come to 950 gross: 800 straight time and 150 overtime at 30 an hour.
Ssamurai
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💰 Finance & moneyFree
Time value of money calculator
1,000 invested at 5% a year, compounded monthly for 10 years, grows to 1,647.01 over 120 periods. Switch to present value to see what a future lump is worth…
PPavilion
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💰 Finance & moneyFree
Treynor ratio calculator
A portfolio that returned 12% when cash paid 4% earned 8 points of excess return; with a beta of 1.2, the Treynor ratio turns that into reward per unit of…
Aabuela
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💰 Finance & moneyFree
Triple discount calculator
Taking 20%, then 10%, then 5% off 100 leaves a final price of 68.40, a true discount of 31.6%, not 35%.
Ssamurai
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💰 Finance & moneyFree
TRIR calculator
Yearly returns of 8%, -2% and 5% link to a total of 11.132%, because each period compounds on the one before instead of being averaged.
PPavilion
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💰 Finance & moneyFree
Trump tariff calculator
Ten units with a customs value of 100 each, under a 25% tariff, carry 250 in duty and a landed cost of 1,250.
Ssamurai
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💰 Finance & moneyFree
Trump tax calculator
Under the 2017 TCJA tables, a single filer with 80,000 of taxable income is in the 22% bracket, yet only the top slice is taxed at that rate.
Aabuela
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💰 Finance & moneyFree
TTM calculator
Quarters of 1,200,000, 1,350,000, 1,425,000 and 1,500,000 add up to a trailing twelve months total of 5,475,000.
PPavilion
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💰 Finance & moneyFree
UK coin weight calculator
Sixteen coins from 1p to £2 weigh 98.73 grams together, using official Royal Mint masses from 3.56 g for a penny to 12.00 g for a £2 coin.
Aabuela
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💰 Finance & moneyFree
UK take-home pay calculator
On a 50,000 salary with tax code 1257L and a 5% pension, 2,500 goes to the pension, the personal allowance is 12,570 and income tax is 6,986 in 2025/26.
Ssamurai
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💰 Finance & moneyFree
Unemployment benefit HEALS calculator
With 1,000 of prior weekly wages, a 50% state rate and a 400 state maximum, HEALS would have paid 700 a week: 400 from the state plus a 300 federal top-up…
PPavilion
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💰 Finance & moneyFree
Unlevered free cash flow calculator
EBIT of 100,000 taxed at 25%, plus 20,000 of depreciation, minus 30,000 of capital spending and a 5,000 rise in working capital, leaves UFCF of 60,000 for all…
Aabuela
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💰 Finance & moneyFree
US income percentile calculator
A household income of 80,000 sits at the 50th percentile, right on the median: half of US households earn less.
Ssamurai
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💰 Finance & moneyFree
VA disability combined rating calculator
Ratings of 50%, 30% and 20% combine to 72 under the VA whole-person method, which becomes an official 70% rating, not 100%.
PPavilion
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💰 Finance & moneyFree
VaR calculator
A 1,000,000 portfolio with 20% annual volatility has a 10-day value at risk of 65,532.54 at 95% confidence: the loss to treat as the worst case over that…
Aabuela
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💰 Finance & moneyFree
WACC calculator
With 600,000 of equity costing 12% and 400,000 of debt at 6% before a 25% tax rate, WACC is 9%: the blended return the firm must earn on its capital.
Ssamurai
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💰 Finance & moneyFree
Wage calculator
At 25 an hour, 40 hours a week for 52 weeks comes to 1,000 a week and 52,000 a year in gross pay. Enter your hourly wage, weekly hours and working weeks to…
PPavilion
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💰 Finance & moneyFree
Website ad revenue calculator
100,000 monthly page views with a 2% click-through rate and 0.5 per click bring 2,000 clicks and an estimated 1,000 a month in ad revenue.
Aabuela
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💰 Finance & moneyFree
Wedding budget calculator
100 guests at 85 a head for catering, a 5,000 venue and 2,500 for decoration add up to a wedding budget of 16,000.
Ssamurai
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How it works

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Get your key

Create an account with your email and add balance when you need it. No subscription, no sales call.

2

Call the endpoint

One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.

3

Collect the result

Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.

Pay only for what you use

No subscription. Free tools run in your browser; paid tasks draw from your balance, which never expires.

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On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.

Balance
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Top up your balance and spend it across web, API and the app. It never expires.