Core Principles
Built for speed, privacy, and simplicity
Zero Data Collection
All computations occur directly in your browser's V8 engine. No cookies, no analytics tracking, and zero database queries.
Instant & Offline-First
Zero round-trip latency to remote servers. The tools load instantly, cache efficiently, and function without interruption.
100% Free & Open Source
Every line of code is inspectable on GitHub under the permissive MIT license. Fork it, contribute, or run it locally.
Curated Showcase
Popular Tools & Calculators
Direct browser execution with zero login or signup required.
Popular
Finance
SIP Calculator
Calculate expected returns on Systematic Investment Plans with Indian Rupee formatting and wealth charts.
Launch Tool
Featured
Finance
Interest Calculator
Compare simple vs compound interest over time with dynamic graphs, flexible compounding, and CSV export.
Launch Tool
India
Tax & Compliance
GST Calculator
Compute Goods & Services Tax quickly with standard 5%, 12%, 18%, and 28% slabs for inclusive or exclusive amounts.
Launch Tool
FY 2024-25
Tax & Compliance
Income Tax Calculator
Accurately compare tax liabilities under the New vs Old Tax Regime in India with standard deduction calculations.
Launch Tool
Updated
Productivity
Text & String Utilities
Transform, clean, count, and format text content instantly. Includes case convert, spaces cleaner, and morse code.
Launch Tool
Secure
Security
Password Generator
Generate cryptographically strong passwords using browser-native entropy with custom rules and age verification.
Launch Tool
Community Loved
Trusted by creators & financial planners
"The interest and SIP calculators are blazingly fast with precise Indian Rupee formatting. Zero ads in the way and no tracking."
JD
John D.
Certified Financial Advisor
"I use the password generator and text tools daily. Knowing that it's 100% open source gives me total peace of mind."
SL
Sarah L.
Full-Stack Engineer
"The new dark and light mode UI is stunning. The contrast and responsiveness are on par with modern SaaS applications."
RK
Rahul K.
Product Designer
Got Questions?
Frequently Asked Questions
Everything you need to know about our free, zero-tracking web utilities and financial calculators.
Q1.What is usealltools.com (Anantastra)?
usealltools.com is a free, privacy-first suite of web utilities and calculators designed to run 100% locally in your browser. From financial planning (SIP, Income Tax, GST, Loan EMI) to developer utilities (JSON formatter, Base converters, Diff checker) and security tools (password generator), all computations execute on client-side JavaScript without recording or transmitting your data.
Q2.Are all tools on usealltools.com completely free to use?
Yes, 100% of the tools, calculators, and converters are completely free with no usage limits, no credit card requirements, and no registration needed.
Q3.How does client-side calculation protect my data and privacy?
Traditional web calculators send your sensitive inputs (such as income figures, loan values, or passwords) over the network to a backend server. On usealltools.com, all mathematical operations execute strictly inside your browser's V8 engine via Web APIs. No cookies, session tracking, or remote databases record what you calculate.
Q4.Do these online calculators work offline?
Yes. Because every calculation engine is packaged with client-side code and cached by your browser, once a tool page is loaded, it continues to compute results, generate amortization tables, and plot charts without requiring an active internet connection.
Q5.Which Indian financial and tax calculators are supported?
We offer dedicated tools tailored to Indian regulations, including the Income Tax Calculator (comparing New vs Old Tax Regime for FY 2024-25 and FY 2025-26 with Section 87A rebate and 80C/80D deductions), the GST Calculator (with CGST, SGST, IGST breakdown across 0%, 5%, 12%, 18%, 28% slabs), the Mutual Fund SIP Calculator (with INR Lakhs and Crores formatting), and the Loan EMI Calculator with amortization schedules.
Q6.Can I inspect the source code or contribute new tools?
Yes! The entire project is open-source under the MIT license on GitHub. Developers are welcome to review the code, verify our zero-tracking architecture, or submit pull requests for new utilities.