Free Online Tools

About SarvKit

Free financial calculators, developer tools, design tools, business tools, student tools, PDF tools, text tools, and SEO tools — built for everyone.

What's in the name?

The name SarvKit comes from the Sanskrit word सर्व (sarva), meaning “all,” “every,” or “whole.” It's the same root behind words like sarvajña (all-knowing), sarvaśakti (all-powerful), and sarvodaya (upliftment of all). Pair it with “Kit” and you get exactly what this site is built to be: an all-in-one kit of free online tools — every calculator, converter, generator, and utility you need for finance, health, study, work, design, writing, and development, all in one place.

Our Mission

SarvKit was built with a simple goal: provide free, high-quality tools that anyone can use without sign-ups or paywalls. Whether you're planning your finances, tracking your health, debugging code, converting data formats, converting units, working with PDFs, building your resume, polishing your writing, optimizing for search engines, designing graphics, running a business, or studying for exams, our 260+ tools and guides are designed to be fast, private, and easy to use.

We believe essential tools should be accessible to everyone. All calculations and conversions happen entirely in your browser — no data ever leaves your device.

What We Offer

Our Tool Suites

Who Is This For?

• Beginners who want to understand how saving and investing works
• Students learning about compound interest, finance, or programming
• Investors planning retirement savings, college funds, or emergency funds
• Home buyers calculating mortgage payments and amortization
• Salaried employees checking EPF, HRA, gratuity, and tax regime benefits
• US workers planning 401(k) contributions, Roth IRA savings, student loan repayment, and Social Security benefits
• Developers formatting JSON, decoding JWTs, testing regex, generating hashes, or converting data
• Health-conscious individuals tracking calories, macros, body fat, heart rate zones, and water intake
• Writers & content creators checking readability, word count, headline strength, and text formatting
• SEO professionals generating meta tags, schema markup, robots.txt, sitemaps, and previewing SERP results
• Anyone looking for free, no-sign-up tools that respect their privacy

Our Values

• Free forever: No subscriptions, no sign-ups, no paywalls.
• Privacy first: All operations stay in your browser. We don't collect your data.
• Transparency: We show our formulas and clearly state our tools are not professional advice.
• Accessibility: Designed to work on any device — desktop, tablet, or phone.

Guides & Resources

We publish guides to help you make better decisions and learn new concepts:

• Investment Guide — How to start investing from scratch
• Loan Guide — Strategies to save on loan interest
• Tax Benefits Guide — Maximize deductions under 80C, 80D, HRA & more
• SIP vs FD — Which is better for your goals?
• Best Investment Guide — Top options for every risk appetite
• Retirement Planning — Build a retirement corpus step by step
• NPS Guide — Tier I vs II, tax benefits, and withdrawal rules
• PPF Guide — Interest, EEE tax status, and extension options
• EMI Reduction Guide — Prepayment, balance transfer, and refinancing
• BMI & Health Guide — BMI categories, Asian standards, and healthy weight tips
• SWP Income Guide — Safe withdrawal rates and bucket strategy
• US Retirement Guide — 401(k), Roth IRA, Social Security, and 2026 contribution limits
• Student Loan Guide — Federal rates, repayment plans, PSLF, and payoff strategies
• US Tax Guide 2026 — Federal brackets, deductions, credits, and OBBBA changes
• UK Tax Guide 2025/26 — PAYE bands, National Insurance, personal allowance taper, and tax-saving strategies
• UK Pension & ISA Guide — Workplace pensions, SIPPs, ISAs, Lifetime ISAs, and retirement planning
• Credit Card Debt Guide — How CC interest works, minimum payment trap, avalanche vs snowball, and balance transfer
• Inflation Guide — What causes inflation, CPI measurement, purchasing power erosion, and strategies to beat inflation
• Debt-Free Roadmap — Complete guide to eliminating all debt — inventory, DTI ratio, and payoff strategies
• Developer Blog — 21 articles on Base64, JWT, regex, JSON Schema, Git, Markdown, UUIDs, cron, passwords, QR codes & more
• Nutrition & Calorie Guide — Calories, TDEE, macronutrients, and building a sustainable nutrition plan
• Fitness & Exercise Guide — Heart rate zones, MET values, exercise types, and weekly workout plans
• Body Composition Guide — Body fat %, ideal weight formulas, BMI limitations, and improving body composition
• Sleep Guide — Sleep cycles, stages, circadian rhythm, recommended sleep by age, and tips for better rest
• Pregnancy Health Guide — Trimester milestones, nutrition needs, safe exercises, and prenatal vitamins
• Hydration Guide — Daily water needs, dehydration stages, electrolytes, and practical hydration tips
• Strength Training Guide — Progressive overload, rep ranges, training splits, and building muscle
• Heart Rate Zones Guide — Training zones, max HR formulas, VO2 max, and zone-based workouts
• Exercise & Mental Health Guide — How exercise reduces anxiety & depression, minimum dose, and runner's high
• UnitSnap Guides — 9 guides on metric vs imperial, cooking measurements, data storage, temperature scales, fuel efficiency, time zones, pressure units, energy & power, and angles
• PDFTools Guides — 8 guides on PDF compression, merging/splitting, security, accessibility, optimization, watermarks, page numbering & PDF-to-image conversion
• ResumeKit Guides — 9 guides on resume writing, cover letters, ATS optimization, LinkedIn, job search strategy, interviews, salary negotiation, career change & portfolios
• TextKit Guides — 9 guides on readability, headlines, email subjects, URL slugs, word count, Unicode, grammar, SEO writing & content structure
• SEOKit Guides — 8 guides on meta tags, Open Graph, robots.txt, structured data, keyword density, SERP optimization, sitemaps & heading structure
• DesignKit Guides — 10 guides on image optimization, CSS gradients, color theory, favicons, responsive images, box shadows, mockups, SVG, typography & UI design
• BizKit Guides — 10 guides on invoicing, pricing strategy, break-even analysis, freelancer rates, startup costs, business plans, cash flow, marketing budgets, revenue forecasting & taxes
• StudentKit Guides — 10 guides on GPA, citation styles, study techniques, academic writing, time management, exam prep, note-taking, research skills, group study & online learning

Disclaimer

SarvKit is an educational resource. Financial calculator results are mathematical estimates and should not be taken as financial advice. Developer tools are provided as-is for convenience. Always consult qualified professionals for important decisions. See our full Terms of Service and Privacy Policy for details.