Free calculators and utilities that run in your browser, no signup and nothing you type is sent anywhere. Use them as often as you like; if you want your business to run this way every day, check out Renaska.
Create a direct WhatsApp link with a prefilled message and its QR code, without saving the contact.
Use for freeGenerate a PDF quote or proforma invoice with your lines, currency, and per-line discount and tax.
Use for freeGenerate EAN-13, EAN-8, Code 128 or QR barcode labels as a PDF, ready to print on Avery sheets or thermal rolls.
Use for freeCompute how much Meta charges you per month for your WhatsApp templates, by market and volume.
Use for freeCheck your WhatsApp template format (name, variables, buttons) before you submit it to Meta.
Use for freeCreate a QR code for a link, text, Wi-Fi network or contact, with your own colors and an optional logo.
Use for freeCalculate the sale price for the margin or markup you want, including shipping, fee and tax.
Use for freeCalculate how many units you need to sell to cover your fixed costs.
Use for freeGenerate a Colombian cuenta de cobro PDF with your data, the payer's data, the amount in words and your bank account.
Use for freeCompare how much each Colombian payment gateway keeps from a sale, by payment method.
Use for freeInstantly calculate or validate the check digit (DV) of a Colombian tax ID (NIT).
Use for freeCalculate VAT, income tax withholding, reteIVA and reteICA on a Colombian invoice.
Use for freeCheck Colombia DIAN filing deadlines for 2026 by NIT and taxpayer type.
Use for freeCompare Colombia’s Simple Tax Regime (RST) against the ordinary regime and see which one saves you more.
Use for freeLook up Colombian public holidays by year, download an .ics file, and calculate business days between two dates.
Use for freeCalculate payroll net pay in Colombia and the employer cost: health, pension, ARL and social benefits.
Use for freeCalculate Colombia payroll final settlement: service bonus, severance fund, vacation pay and indemnity.
Use for freeCalculate payroll overtime pay in Colombia from the date and time of each shift, based on the schedule and rate in effect.
Use for freeCalculate US payroll withholding and net paycheck from a W-4, including federal tax, FICA and covered state taxes.
Use for freeGenerate a Colombian labor certificate PDF with your company, the employee, their position, contract and salary in words.
Use for freeGenerate a Colombian payroll payslip PDF with the salary, extra earnings, deductions, health, pension and net pay.
Use for free