Tools & Calculators Directory
High-precision financial models, developer encoders, PDF utilities, and image tools. Every calculation runs entirely in your browser memory with zero server uploads and instant Excel exports.
Financial Calculators
Mortgage PITI & amortization schedules, auto financing, retirement 401(k) accumulation, inflation, and compound interest models.
Explore CategoryData & Developer Tools
JSON formatters, Base64 encoders, JWT inspectors, UUID generators, Unix timestamp converters, and byte storage calculators.
Explore CategoryDaily Utilities & PDF
PDF merge, split, page numbering, table extraction, image conversions (WebP, PNG, SVG), age calculation, and unit converters.
Explore CategoryBase64 Encoder & Decoder
Encode plain text or binary data into Base64 format, or decode Base64 strings back to text directly in your browser.
JSON Formatter & Validator
Format, beautify, minify, and validate JSON payloads with accurate syntax error highlighting and tree structure viewing.
URL Encoder & Decoder
Safely encode special characters for query parameters or decode percent-encoded URLs back to human-readable strings.
Cryptographic Hash Generator
Generate secure cryptographic message digests and checksums for strings and passwords using native Web Crypto APIs.
Unix Timestamp Converter
Convert Unix epoch timestamps (seconds and milliseconds) to UTC and local human-readable calendar dates, or vice versa.
Color Code Converter (HEX, RGB, HSL)
Convert color formats between HEX, RGB, RGBA, and HSL with live visual swatch preview and CSS snippet generators.
SIP Calculator
Calculate expected future returns on your monthly Systematic Investment Plan (SIP) investments with compound interest growth projections.
EMI Calculator
Calculate your monthly Equated Monthly Installment (EMI), total interest payable, and overall loan repayment schedule.
Compound Interest Calculator
Forecast exponential savings growth with customizable compounding intervals (annual, quarterly, monthly, daily) and regular deposits.
GST Calculator
Calculate Goods and Services Tax (GST) effortlessly. Add or remove tax with standard slabs (5%, 12%, 18%, 28%) or custom rates.
Percentage Calculator
Solve all percentage math instantly: calculate percentage of a number, percentage increase/decrease, and what percent X is of Y.
Discount & Sale Price Calculator
Calculate final sale prices, dollar savings, and stacked coupon discounts during shopping sales and wholesale purchases.
Chronological Age Calculator
Calculate your exact chronological age from your date of birth down to the minute, with upcoming birthday countdowns and milestones.
Date Difference & Duration Calculator
Calculate the exact number of days, weeks, months, and working business days between any two calendar dates.
BMI Calculator (Body Mass Index)
Calculate your Body Mass Index (BMI) using metric (kg/cm) or imperial (lbs/feet) measurements with WHO classification charts.
Universal Unit Converter
Instantly convert between metric and imperial units across length, mass, temperature, area, volume, speed, and time.
Tip & Bill Splitter Calculator
Calculate restaurant tips, service charges, and split bill totals evenly among friends or colleagues with custom tip percentages.
Data Size & Byte Converter
Convert digital storage units between Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, and Petabytes using Binary or Decimal standards.
Salary & Take-Home Paycheck Calculator
Calculate monthly take-home in-hand salary from gross CTC after deducting provident fund (PF), professional tax, and income taxes.
Income Tax Slab Calculator
Estimate your income tax liability across progressive tax slabs with standard deduction and cess calculations.
JWT Token Inspector & Decoder
Decode and inspect JSON Web Tokens (JWT) headers, claims, issued timestamps, and expiration status with 100% client-side privacy.
UUID / GUID v4 Batch Generator
Generate cryptographically secure random Universally Unique Identifiers (UUID v4 / GUID) individually or in bulk with custom formats.
Profit Margin & Markup Calculator
Calculate gross profit margin percentage, markup percentage, cost of goods, and selling price for retail and wholesale business.
Return on Investment (ROI) Calculator
Calculate simple and annualized Return on Investment (ROI) percentage and total capital gains across business ventures and stocks.
WebP to PNG Converter
Convert Google WebP images to high-definition transparent PNG files directly in your web browser with 100% privacy.
PNG to WebP Converter
Convert PNG images to next-gen WebP format with configurable compression and transparency support to speed up website load times.
JPEG to PNG Converter
Convert JPG and JPEG photos to uncompressed PNG format for clean editing, overlaying, and graphics design.
Image Resizer & Compressor
Compress and resize WebP, PNG, and JPEG images to exact pixel widths and target file sizes directly in browser memory.
SVG to PNG Rasterizer
Render scalable vector graphics (SVG) into crisp transparent PNG images at any custom resolution up to 4K.
Merge PDF Online
Combine multiple PDF documents into a single organized PDF file in seconds directly in your web browser.
Split PDF & Extract Pages
Separate specific pages or custom page ranges from any PDF document quickly and securely in your browser.
Watermark PDF Online
Protect your intellectual property by stamping custom text watermarks like CONFIDENTIAL or DRAFT onto every PDF page.
Add Page Numbers to PDF
Stamp clean, professional page numbering onto every page of your PDF documents with customizable position and format.
PDF Table & Text Extractor to Excel
Parse structured text and tables from PDF documents and export directly to clean Excel (.xlsx) or CSV spreadsheets.
Mortgage Calculator & Amortization Schedule
Calculate monthly payments with principal, interest, property taxes, home insurance, and PMI. Export complete month-by-month amortization schedules directly to Excel (.xlsx).
Auto & Car Loan Calculator
Calculate monthly auto loan payments factoring in vehicle purchase price, dealer documentation fees, sales tax, trade-in equity, and down payment.
Retirement & 401(k) Nest Egg Calculator
Simulate your retirement nest egg growth with employer 401(k) matching, inflation-adjusted purchasing power, and post-retirement safe withdrawal longevity.
Inflation & Purchasing Power Calculator
Calculate how inflation erodes purchasing power over time, and determine the exact future dollar amount needed to maintain your standard of living.
In-Browser SQL Query Studio
Run lightning-fast analytical SQL queries directly against CSV, Parquet, Excel, and JSON files inside browser RAM with zero server uploads.
Spreadsheet & File Diff Checker
Compare two CSV or Excel spreadsheets side by side. Visually inspect added rows, deleted records, and changed cell values in color.
Client-Side Data Cleaner & PII Anonymizer
Mask customer emails, phone numbers, credit cards, and SSNs in CSV and Excel spreadsheets before sharing or training AI models. 100% private.
Downloadable Excel Financial Templates (.xlsx)
Pre-built, formula-driven spreadsheets ready to open in Microsoft Excel, Google Sheets, or Apple Numbers. 100% free & private.
50/30/20 Personal Budget & Wealth Planner
Automated monthly cash-flow manager dividing net take-home pay into 50% Needs, 30% Wants, and 20% Savings & Debt Acceleration.
Debt Snowball & Avalanche Payoff Calculator
Side-by-side debt elimination planner comparing the psychological wins of the Snowball method (lowest balance) vs mathematical savings of the Avalanche method (highest APR).
Rental Property & Real Estate ROI Cash Flow Model
Complete real estate investment analysis: calculates Net Operating Income (NOI), Capitalization Rate (Cap Rate), Cash-on-Cash Return, and debt service coverage (DSCR).
Personal Net Worth & Asset Allocation Tracker
Track all liquid assets, retirement portfolios, real estate equity, and liabilities over time to visualize trajectory toward financial independence.
Why ConvertSheet Tools Are Different
Unlike legacy calculator hubs that record your financial inputs or upload your PDF files to remote cloud servers, ConvertSheet executes all logic locally in your browser memory.
Powered by SheetJS, our financial calculators allow you to download complete month-by-month and year-by-year amortization schedules directly into Microsoft Excel or Google Sheets.
Every calculation recalculates instantly on keystroke with zero network round trips. Free forever with no account creation or credit card required.