Free online calculators & tools, right in your browser
Age, BMI, loan and GPA calculators, PDF and image tools, text to speech and more. No sign-up, no watermarks — and your files never leave your device.
Free online calculators
Free calculators for age, BMI, loans, mortgages, compound interest, GPA, tips, discounts and percentages. Results update instantly as you type.
Age Calculator
Exact age in years, months and days, plus next birthday.
CalculatorPercentage Calculator
Percent of a number, % change, increase and decrease.
CalculatorBMI Calculator
Body Mass Index and healthy weight range in metric or US units.
CalculatorLoan Calculator
Monthly payment (EMI), total interest and repayment schedule.
CalculatorMortgage Calculator
Monthly mortgage with taxes, insurance, PMI and HOA.
CalculatorCompound Interest
See savings grow with monthly contributions.
CalculatorTip Calculator
Work out the tip and split the bill between friends.
CalculatorDiscount Calculator
Sale price, savings and stacked percent-off deals.
CalculatorGPA Calculator
Semester and cumulative GPA on the 4.0 scale.
AI and voice tools
Text to speech with natural AI voices, a voice changer, a token counter for GPT, Claude and Gemini, and prompt tools.
AI Voice Generator
Free text to speech with natural voices in many languages.
AIVoice Changer
Record or upload audio and add robot, chipmunk or deep voice effects.
AIToken Counter
Count tokens and estimate API cost across GPT, Claude and Gemini.
AIImage Prompt Builder
Build Midjourney and Stable Diffusion prompts from simple choices.
AIPrompt Library
Ready-made prompts for writing, coding and marketing.
AIAI Text Cleaner
Strip markdown, asterisks and smart quotes from AI output.
PDF tools
Merge, split, compress, rotate and convert PDF files — processed in your browser, never uploaded.
Merge PDF
Combine several PDFs into one file, in the order you choose.
PDFSplit PDF
Pull out the pages you need or break a PDF into single pages.
PDFCompress PDF
Shrink a PDF for email or upload without wrecking quality.
PDFPDF to JPG
Turn every page of a PDF into a high-quality JPG image.
PDFJPG to PDF
Pack photos and scans into one tidy PDF document.
PDFRotate PDF
Fix sideways or upside-down pages and save a new PDF.
Image tools
Compress, resize and convert JPG, PNG and WebP images, with you in control of the quality.
Converters and utilities
Time zone and unit converters, QR code generator, word counter and password generator.
Time Zone Converter
Convert a time between cities, with daylight saving.
UtilityUnit Converter
Length, weight, temperature, volume, area, speed and more.
UtilityQR Code Generator
Make a QR code for a link, text or Wi-Fi and download it.
UtilityWord Counter
Live word, character, sentence and reading-time counts.
UtilityPassword Generator
Strong random passwords with the rules you pick.
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Why AI Mode
Built for speed and privacy
Most online tools upload your file to a server, process it, and hope you don’t ask where it went. Ours run inside your browser instead.
Nothing gets uploaded
Every tool processes your file or numbers locally with JavaScript. Close the tab and it’s gone.
Instant results
No upload, no queue, no page reloads. Calculators update as you type.
No limits, no watermarks
Use every tool as often as you like. No daily caps, no stamps on your output, no paywall.
FAQ
Common questions
Are these tools really free?
Yes. Every tool on AI Mode is free with no account, no daily limit and no watermark.
Do you store my files, numbers or text?
No. Everything is processed in your browser and never uploaded to our servers.
Are the calculator results accurate?
They use standard published formulas (EMI, compound interest, WHO BMI categories and more). For big financial or health decisions, confirm with a professional.
Can I request a new tool?
Absolutely — tell us on the contact page.
What free online calculators are available?
You can work out your exact age, percentages, BMI, loan EMI, mortgage payments, compound interest, tips, discounts and GPA. Each calculator updates as you type and explains the formula it uses on its own page, with a worked example you can check by hand.
Do the tools work on my phone?
Yes. Every tool is built for mobile first and runs in any modern browser on Android, iPhone, tablets, Windows, Mac and Linux. There is nothing to install, and most tools keep working even on a slow connection once the page has loaded.
Why do the PDF and image tools not upload my files?
They use open-source libraries such as pdf-lib and the browser canvas to do the work directly on your device. That keeps private documents like ID scans, contracts and bank statements off our servers and usually makes the tools faster, because nothing has to travel over the internet.
Which currencies and units do the calculators support?
The money calculators work with any currency, because they only use the numbers you type. The BMI calculator accepts metric or US units, and the unit converter covers length, weight, temperature, volume, area, speed and more, so the site works the same wherever you live.