Free Online Calculators & Developer Tools
Plan loans, project investments, format JSON, test regex, generate color palettes — all in your browser, instantly.
1,400+ Free Pages
Calculators, converters & more
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Most Popular Tools
Jump into our most-used calculators and utilities.
SIP Calculator
Project mutual fund SIP growth with returns and tenure.
EMI Calculator
Instantly calculate loan EMI, interest, and total payoff.
JSON Formatter
Validate, prettify, and minify JSON data instantly.
GST Calculator
Add or remove GST for Indian invoices in one click.
Regex Tester
Test regex patterns with live highlighting and match groups.
Color Palettes
Generate harmonious color schemes with one click.
Financial Calculators
EMI, SIP, GST, PPF, HRA for India. Mortgage, compound interest, tips for global use.
Developer Tools
JSON formatting, regex testing, palette generation, cron scheduling, and policy drafting.
Why people use ToolPilot
ToolPilot is a collection of free, fast online calculators and developer tools. Whether you're comparing loan EMIs, checking SIP projections, formatting API payloads, or testing regular expressions — every tool runs entirely in your browser with zero latency. No accounts, no paywalls, no data sent to servers. Just tools you can open, use, and close.