Free Online Tools
for Everyone
Useful tools should not need a subscription, an email address or a privacy trade-off. LazyTools gives you browser-based tools for finance, science, images, text, code and more — open any tool and start right now.
Try: "mortgage calculator" · "image compressor" · "JSON formatter"
Every tool produces results the moment you enter your values. No loading, no redirects, no upsells.
All processing happens in your browser. Your data never touches our servers — ever.
No premium tier, no trial, no credit card. Every tool is free — today and permanently.
Not now, not ever. No registration form, no email verification, no password to remember.
Our Mission
Useful software should be free. Full stop.
Most free tools have a catch. Many ask for an account before showing a result. Others hide useful features behind a paywall. Many quietly log everything you type. We built LazyTools because we were tired of the same pattern.
A mortgage calculator, a unit converter and a JSON formatter are utilities — not products to monetise. They should work the moment you open them, require nothing from you and leave no trace behind. That is the entire mission.
Our Vision
Access to good tools should not depend on your budget.
A student in Lagos doing chemistry homework and a CFO in London modelling an acquisition should both access a reliable mole fraction calculator without logging in, paying or handing over their data. Access to useful tools is a baseline, not a privilege.
As LazyTools grows, that principle guides every decision. New tools are added based on what people actually need — not what generates the most sign-ups. Moreover, no tool will ever move behind a paywall once it is live. The collection grows; the rules do not change.
If you have an idea that belongs here, tell us. It could be the next tool that helps thousands of people who had no reliable free alternative.
Who LazyTools Helps Every Day
Real moments where having the right tool — free, private and instant — makes a genuine difference.
Students & Researchers
A chemistry student verifying a titration calculation. A biology postgrad running a serial dilution. An economics student checking a GDP formula. These tools give accurate results immediately. Furthermore, they work on a phone at midnight before a deadline.
Professionals & Freelancers
A freelancer calculating their effective hourly rate. A developer formatting JSON mid-debugging. A designer checking contrast ratios against WCAG. A finance analyst running a break-even before a meeting. Moreover, none of them should need a subscription to do their job.
Everyday Decisions
A family comparing mortgage options. A traveller converting time zones. Someone checking whether a deal is actually a good deal. Additionally, a cook converting cup measurements, or anyone who needs a quick reliable number to make a better decision.
Browse All Categories
Every category is a focused collection of tools built around a specific type of task.
Finance
Loans, budgeting, investment and tax
Math & Science
Chemistry, biology, physics and ecology
Calculators
Health, construction and everyday maths
Image Tools
Resize, compress, convert and edit
Date & Time
Date calculators and calendar converters
Developer Tools
JSON, SQL, CSS, JWT and regex tools
Converters
Length, weight, temperature and more
Text Tools
Case converter, word count and more
Music Tools
Tuner, metronome, BPM and audio
Productivity
Planners, trackers and decision tools
PDF Tools
Merge, split, convert and organise PDFs
SEO & Web Tools
Schema generators and technical SEO
Generators
Password, QR code and random generators
Color Tools
Colour converter, palette and contrast
Encoders
Base64, hash, cipher and QR tools
How It Works
No setup. No learning curve. Three steps to your answer.
Search by name above or browse any category. Every tool has a plain title so you find what you need in seconds. Furthermore, search covers all categories at once.
Open the tool and type in your numbers, text or settings. No account setup, no tutorial, no paywall. Moreover, your inputs are processed locally — nothing leaves your browser.
Results appear instantly. Copy, use or move on — no friction. Additionally, return to any tool any time without logging in. There is no account, so there is nothing to remember.
Popular Tools
Widely used tools from across all categories — all free, all instant.
EMI Calculator
FinanceBMI & Health Suite
CalculatorsCompound Interest
CalculatorsImage Compressor
Image ToolsWord Count
Text ToolsJSON Formatter
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GeneratorsAge Calculator
CalculatorsDiscount Calculator
FinanceQR Code Generator
GeneratorsMortgage Calculator
CalculatorsCase Converter
Text ToolsCurrency Converter
ConvertersBackground Remover
Image ToolsPDF Merger
PDF ToolsROI Calculator
FinanceDate Difference
Date & TimeRegex Tester
Developer ToolspH Calculator
Math & ScienceColor Converter
Color ToolsTip & Bill Splitter
CalculatorsTime Zone Converter
Date & TimeSalary to Hourly
FinanceURL Encoder/Decoder
Developer ToolsFrequently Asked Questions
Find your tool and get your answer
Free. Private. Instant. No sign-up required — ever.