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Powerful Web Engines

Everyday Utility Tools, Zero Telemetry.

High-performance calculators, unit converters, and media optimizers running directly and privately inside your browser memory.

Catalog

932
Finance

Massachusetts Capital Gains Tax Calculator 2026

Calculate combined Massachusetts and federal capital gains taxes, including the 4% Fair Share Amendment millionaire surtax and long-term 5.0% rate.

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Developer

Twitter / X Character Counter

Count characters with exact Twitter/X rules: 280 limit, t.co URLs as 23 chars, emojis as 2 chars, and auto thread splitting.

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Finance

West Virginia Unemployment Calculator 2026

Estimate West Virginia unemployment insurance benefits under WorkForce WV rules. Calculates Weekly Benefit Rate (WBR max $662/wk), 26-week duration, and 10% voluntary federal tax withholding.

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Sports

NFL Playoff Predictor 2026

Predict the NFL playoff picture. Order all 8 divisions, pick wildcards, set 1-7 seeds for the AFC and NFC, and simulate the playoff bracket to the Super Bowl.

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Finance

Michigan Unemployment Benefits Calculator 2026

Calculate Michigan Unemployment Insurance Agency (UIA) weekly benefit rate (WBR), dependent allowances, statutory $362 maximum cap, and qualified benefit duration (14 to 20 weeks).

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Finance

PMI Removal Calculator 2026

Calculate the exact timeline to cancel private mortgage insurance (PMI) at 80% LTV under the Homeowners Protection Act, automatic 78% LTV termination, and savings from extra payments.

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Utility

WebGL Fluid Simulation 2026

Interactive real-time WebGL fluid simulation with Navier-Stokes dynamics, colorful dye advection, glow bloom, and touch controls.

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Lifestyle

Sourdough Starter Calculator

Calculate sourdough starter feeding ratios, flour and water grams, discard amounts, and fermentation rise times based on ambient room temperature.

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Finance

USDA Loan Income Limit Calculator 2026

Check USDA Section 502 Rural Development home loan eligibility: calculates adjusted annual household income with statutory child, dependent, and elderly deductions.

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Finance

Connecticut Sales Tax Calculator 2026

Calculate Connecticut sales and use taxes: 6.35% standard statewide rate, 7.35% prepared meals tax, and 7.75% luxury goods tax. Features forward tax addition and reverse sales tax extraction.

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Health

Dog Medication Dosage Calculator

Calculate safe over-the-counter (OTC) medication dosages for dogs by body weight. Computes milligram doses, tablet counts, liquid volumes, and safety intervals for Benadryl, Pepcid, Zyrtec, and more.

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Finance

Owner-Only 401(k) Calculator 2026

Calculate your maximum Solo 401(k) / Owner-Only 401(k) contribution for the current tax year: employee elective deferrals plus 25% employer profit-sharing up to the overall IRS 415(c) limit.

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About ToolSlash Engine

ToolSlash is a high-performance utility platform engineered for speed, privacy, and efficiency. Our core engine powers a wide array of everyday tools - from quick converters to sophisticated text and media processors. By running complex algorithms directly in your browser, we eliminate server round-trips to deliver a seamless, lightning-fast experience.

Frequently Asked Questions

Are the utilities free?
Yes, all utility tools on the ToolSlash platform are 100% free to use. There are no premium tiers, hidden fees, or paywalls.
How is data processed?
We strongly prioritize client-side processing. Most of our tools execute entirely within your browser memory for maximum speed and zero data exposure.
Is my data saved?
While some computationally heavy tools may require our backend engine, your files and data are never saved, stored, or analyzed by us.