HXD Labs / tools

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Calculators, image tools and small utilities. Free to use, no account needed.

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Tools by task

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Finance

01Percentage calculatorCalculate percentages, discounts, increases and percentage change with clear results.02Compound interest calculatorProject compound growth with contributions at the start or end of the month, inflation and annual balances.03Brazil CLT Net Salary Calculator 2026Calculate Brazil net salary under CLT formal employment in 2026 with official progressive INSS and IRRF withholding tables.04Salary converter: hourly, daily, monthly & annualConvert salary between hourly, daily, weekly, monthly and annual pay in real time based on an 8-hour day and 40-hour week.05Loan payment calculatorEstimate fixed loan payments, review the amortization schedule and try an extra payment.

Images

06Image converterOpen PNG, JPG, WebP or AVIF images and export as JPG, PNG or WebP without uploading files.07Image compressorResize images, adjust WebP quality and compare the original with the result in your browser.08Aspect ratio calculatorCalculate proportional dimensions with Full HD, square, portrait 9:16 and 1200 × 630 presets.

Health

09BMI calculatorCalculate adult body mass index from weight and height.

Productivity

10QR Code generatorCreate QR Codes for links, text or Wi-Fi; customize color and size and download PNG or SVG.11Unit converterConvert length, mass, area, speed, temperature, volume and cooking measurements.12Date and deadline calculatorCount calendar and business days between dates or find a future date, with an option to include the start date.13Age calculatorFind an exact age in years, months and days and the next birthday.14Proportion calculatorSolve direct and inverse proportions and see the calculation.15Time zone converterConvert times across time zones and check the UTC instant and offsets for each zone.

Text

16Character counter and slug makerCount characters and words, check a target and make a URL slug.

Security

17Password generatorGenerate 8–128 character passwords with letters, numbers and symbols in your browser.

Development

18JSON formatter and validatorFormat JSON with 2-space, 4-space or compact output without uploading your data.19Base64 encoder and decoderEncode UTF-8 text or files up to 1 MB as Base64, and decode data in your browser.

Design

20Color contrast checkerCheck WCAG AA and AAA criteria, preview the chosen colors in sample text and copy a contrast report.

About these tools

HXD Labs maintains these small utilities for everyday tasks. Image conversion and QR Code generation run in your browser. Calculations provide estimates and do not replace professional advice.