Invoices, estimates & business
calculators — free & instant
Online Tools King gives you a fast, mobile-first toolkit to create documents and run numbers in any currency. No login needed — sign in only when you want to save and sync.
Invoice
Create and download a professional invoice PDF in any currency with 5 modern templates. No sign-up needed.
Estimate
Send polished estimates that convert to invoices. Choose a template, set your currency and download instantly.
Quote
Build clean price quotes with line items, tax and notes. Branded templates, global currencies, free PDF.
Receipt
Generate payment receipts for customers in seconds — pick a template, add payment details and print or download.
Purchase Order
Create professional purchase orders for vendors with line items, delivery dates and any currency. Free PDF, no sign-up.
Credit Memo
Issue credit notes / credit memos to customers for refunds, returns or adjustments. Branded templates and instant PDF.
Profit Margin
Work out profit, margin % and markup % from cost and revenue, with a clear breakdown you can copy or save.
Markup
Turn cost and markup % into a selling price and gross profit instantly, in your chosen currency.
Sales Tax
Add or remove sales tax / VAT / GST with inclusive and exclusive modes and a clean total breakdown.
Net 30
Find the exact due date for Net 15, Net 30, Net 60 and custom payment terms from any invoice date.
Late Fee
Calculate flat or percentage late fees, daily or monthly, and the total now due on an overdue invoice.
Loan
Estimate monthly payment, total interest and total payable, with a full amortization schedule and chart.
Home Loan
Calculate your home loan EMI, total interest and a full amortization schedule for any amount, rate and tenure.
Car Loan
Work out your car loan EMI, total interest and monthly payments before you buy your next vehicle.
Bike Loan
Estimate your two-wheeler loan EMI, total interest and overall cost in seconds.
EMI
Calculate the EMI for any loan — personal, home, car or business — with total interest and amortization.
FD
Calculate fixed deposit maturity value and interest earned with flexible compounding frequency.
RD
Calculate recurring deposit maturity value and total interest from your monthly deposits.
Break-even
Find break-even units and revenue from fixed costs, price and variable cost, with contribution margin.
Hourly → Salary
Convert an hourly rate into weekly, monthly and annual pay, with overtime and currency formatting.
Merge PDFNew
Combine multiple PDF files into one document in the order you want — free, fast and private. Files never leave your browser.
Split PDFNew
Extract the exact pages or page ranges you need from a PDF into a new file. Free, instant and processed locally.
Rotate PDFNew
Rotate every page of a PDF by 90°, 180° or 270° and save the new orientation permanently. Free and private.
Page NumbersNew
Stamp clean page numbers onto a PDF — choose position, starting number and the “n / total” format. Free and in-browser.
WatermarkNew
Stamp text like CONFIDENTIAL or DRAFT diagonally across every page of a PDF. Control text, opacity and size — free and private.
JPG to PDFNew
Convert JPG and PNG images into a single PDF, one image per page, in the order you choose. Free, fast and processed locally.
PDF to JPGNew
Convert each page of a PDF into a high-quality JPG image — one page downloads as a JPG, many pages as a ZIP. Free and in-browser.
CompressNew
Reduce PDF file size so it is easy to email or upload. Choose a compression level — works best on scanned and image-heavy PDFs. Free and private.
OrganizeNew
Visually reorder and delete PDF pages with page thumbnails, then rebuild a clean PDF in the new order. Free, fast and in-browser.
SignNew
Add your signature to a PDF — draw it or type your name, then place it on any page. No printing or scanning, processed entirely in your browser.
ProtectNew
Add a password to a PDF with strong AES-256 encryption so only people with the password can open it. Free and processed entirely in your browser.
UnlockNew
Remove the password and encryption from a PDF you can open, so it opens freely. Enter the current password — free and in-browser.
HTML to PDFNew
Convert HTML markup into a clean, multi-page PDF — paste your HTML or upload an .html file. Keeps headings, lists, tables and inline styles. Free and private.
Popular tools
The fastest way to get billing and numbers done.
Invoice
Create and download a professional invoice PDF in any currency with 5 modern templates. No sign-up needed.
Estimate
Send polished estimates that convert to invoices. Choose a template, set your currency and download instantly.
Profit Margin
Work out profit, margin % and markup % from cost and revenue, with a clear breakdown you can copy or save.
Sales Tax
Add or remove sales tax / VAT / GST with inclusive and exclusive modes and a clean total breakdown.
Loan
Estimate monthly payment, total interest and total payable, with a full amortization schedule and chart.
Home Loan
Calculate your home loan EMI, total interest and a full amortization schedule for any amount, rate and tenure.
EMI
Calculate the EMI for any loan — personal, home, car or business — with total interest and amortization.
Merge PDFNew
Combine multiple PDF files into one document in the order you want — free, fast and private. Files never leave your browser.
Split PDFNew
Extract the exact pages or page ranges you need from a PDF into a new file. Free, instant and processed locally.
JPG to PDFNew
Convert JPG and PNG images into a single PDF, one image per page, in the order you choose. Free, fast and processed locally.
PDF to JPGNew
Convert each page of a PDF into a high-quality JPG image — one page downloads as a JPG, many pages as a ZIP. Free and in-browser.
CompressNew
Reduce PDF file size so it is easy to email or upload. Choose a compression level — works best on scanned and image-heavy PDFs. Free and private.
SignNew
Add your signature to a PDF — draw it or type your name, then place it on any page. No printing or scanning, processed entirely in your browser.
Instant & free
Use every tool right away — no account, no paywall. Download, print, copy and share your result.
Global currencies
ISO 4217 currency support with locale-aware formatting, so totals look right wherever you bill.
5 modern templates
Professional invoice, estimate, quote and receipt templates with your logo, colour and notes.
Billing & Documents
Create professional invoices, estimates, quotes and receipts in your currency — free, no login required.
Invoice
Create and download a professional invoice PDF in any currency with 5 modern templates. No sign-up needed.
Estimate
Send polished estimates that convert to invoices. Choose a template, set your currency and download instantly.
Quote
Build clean price quotes with line items, tax and notes. Branded templates, global currencies, free PDF.
Receipt
Generate payment receipts for customers in seconds — pick a template, add payment details and print or download.
Purchase Order
Create professional purchase orders for vendors with line items, delivery dates and any currency. Free PDF, no sign-up.
Credit Memo
Issue credit notes / credit memos to customers for refunds, returns or adjustments. Branded templates and instant PDF.
Finance Calculators
Fast, accurate business and money calculators with formulas, examples and shareable results.
Profit Margin
Work out profit, margin % and markup % from cost and revenue, with a clear breakdown you can copy or save.
Markup
Turn cost and markup % into a selling price and gross profit instantly, in your chosen currency.
Sales Tax
Add or remove sales tax / VAT / GST with inclusive and exclusive modes and a clean total breakdown.
Net 30
Find the exact due date for Net 15, Net 30, Net 60 and custom payment terms from any invoice date.
Late Fee
Calculate flat or percentage late fees, daily or monthly, and the total now due on an overdue invoice.
Loan
Estimate monthly payment, total interest and total payable, with a full amortization schedule and chart.
Home Loan
Calculate your home loan EMI, total interest and a full amortization schedule for any amount, rate and tenure.
Car Loan
Work out your car loan EMI, total interest and monthly payments before you buy your next vehicle.
Bike Loan
Estimate your two-wheeler loan EMI, total interest and overall cost in seconds.
EMI
Calculate the EMI for any loan — personal, home, car or business — with total interest and amortization.
FD
Calculate fixed deposit maturity value and interest earned with flexible compounding frequency.
RD
Calculate recurring deposit maturity value and total interest from your monthly deposits.
Break-even
Find break-even units and revenue from fixed costs, price and variable cost, with contribution margin.
Payroll & Pay
Convert pay rates and work out what teams really earn across weekly, monthly and yearly periods.
PDF Tools
Free, private PDF tools that run entirely in your browser — merge, split, rotate, watermark, number and convert PDFs without ever uploading a file.
Merge PDFNew
Combine multiple PDF files into one document in the order you want — free, fast and private. Files never leave your browser.
Split PDFNew
Extract the exact pages or page ranges you need from a PDF into a new file. Free, instant and processed locally.
Rotate PDFNew
Rotate every page of a PDF by 90°, 180° or 270° and save the new orientation permanently. Free and private.
Page NumbersNew
Stamp clean page numbers onto a PDF — choose position, starting number and the “n / total” format. Free and in-browser.
WatermarkNew
Stamp text like CONFIDENTIAL or DRAFT diagonally across every page of a PDF. Control text, opacity and size — free and private.
JPG to PDFNew
Convert JPG and PNG images into a single PDF, one image per page, in the order you choose. Free, fast and processed locally.
PDF to JPGNew
Convert each page of a PDF into a high-quality JPG image — one page downloads as a JPG, many pages as a ZIP. Free and in-browser.
CompressNew
Reduce PDF file size so it is easy to email or upload. Choose a compression level — works best on scanned and image-heavy PDFs. Free and private.
OrganizeNew
Visually reorder and delete PDF pages with page thumbnails, then rebuild a clean PDF in the new order. Free, fast and in-browser.
SignNew
Add your signature to a PDF — draw it or type your name, then place it on any page. No printing or scanning, processed entirely in your browser.
ProtectNew
Add a password to a PDF with strong AES-256 encryption so only people with the password can open it. Free and processed entirely in your browser.
UnlockNew
Remove the password and encryption from a PDF you can open, so it opens freely. Enter the current password — free and in-browser.
HTML to PDFNew
Convert HTML markup into a clean, multi-page PDF — paste your HTML or upload an .html file. Keeps headings, lists, tables and inline styles. Free and private.
Free online tools that work on any device
Online Tools King is a growing collection of free, mobile-first tools for freelancers, small businesses and growing teams. Create a professional invoice, send an estimate or quote, issue a receipt, or run a quick profit-margin, sales-tax or loan calculation — all in your browser, with nothing to install.
Every tool is free to use as a guest. When you are ready to keep a history, save customers and reuse your business details, create a free account and your guest drafts come with you. Documents and calculators support global currencies using ISO 4217 codes and locale-aware formatting, so your totals always look right.