Free Online Tools
100% browser-based — your data never leaves your device
ToolsMio provides 36 free online tools for everyday tasks — from formatting JSON and generating passwords to calculating loan payments and converting time zones. Every tool runs entirely in your browser using client-side JavaScript, so your data is never uploaded to any server. No sign-up required, no usage limits, no hidden costs.
Browse by Category
Image Tools
6 tools
Make ID photos, remove backgrounds, and edit images in your browser. AI-powered, 100% client-side — your photos never leave your device.
Calculators
4 tools
Age, percentage, loan, and other practical calculators. Fast, free, and private — all calculations happen in your browser.
Health Tools
4 tools
BMI, daily calories, pregnancy due date, and body fat calculators. Health numbers computed instantly in your browser — no data uploaded, fully private.
Finance Tools
4 tools
Mortgage, compound interest, sales tax, and tip calculators. Everyday money math computed instantly in your browser — nothing uploaded, fully private.
Text Tools
3 tools
Word counting, case conversion, placeholder text generation, and more. All text tools run 100% in your browser — no data uploaded.
Developer Tools
7 tools
JSON formatting, Base64 encoding, hash generation, and more. Essential developer utilities that run locally in your browser.
Converters
4 tools
Unit, color, and timezone conversions at your fingertips. Get instant results, no sign-up, fully browser-based and private.
Generators
4 tools
QR codes, passwords, UUIDs, and more — generate instantly. All tools are free, private, and work entirely in your browser.
All Tools
Age Calculator
Calculate your exact age in years, months, and days instantly. Free online age calculator, no data upload, 100% private.
Base64 Encode & Decode
Encode and decode Base64 strings instantly in your browser. Supports text, URLs, and data URIs. Free online tool, 100% private.
BMI Calculator
Calculate your BMI instantly in metric or US units. See your WHO category, healthy weight range, and goal weight - free and 100% private.
Body Fat Calculator
Estimate your body fat percentage with the US Navy tape method or from BMI. See your category, fat mass, and lean mass - free and 100% private.
Calorie Calculator
Calculate your daily calorie needs: BMR and TDEE from the Mifflin-St Jeor equation, plus weight loss and gain targets - free and 100% private.
Case Converter
Convert text between uppercase, lowercase, title case, camelCase, snake_case, and more. Free online tool, runs in browser, 100% private.
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK instantly in your browser. Free color picker and converter, 100% private.
Compound Interest Calculator
Calculate compound interest with monthly contributions. See future value, interest earned, and yearly growth - free, instant, 100% private.
Currency Converter
Convert between currencies with live exchange rates. Supports 30+ currencies, free and easy to use. Rates updated daily from ECB data.
Diff Checker — Compare Two Texts Online
Compare two texts side by side and find differences instantly. Line, word, and character-level diff with split or unified view. JSON-aware, 100% browser-based, free.
Due Date Calculator
Estimate your pregnancy due date from your last period, conception, or IVF transfer date. See gestational age and trimesters - free and private.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly in your browser. Free online tool, no upload required, 100% private.
ID Photo Maker — AI Passport & Visa Photo Creator Online
Create compliant passport, visa, and ID photos with AI background removal. 15 built-in specs (CN, US, JP, Schengen, UK, CA), auto face alignment, print layout. 100% browser — no upload.
Image Compress
Compress JPG and PNG images in your browser. Reduce file size by 60-80% while maintaining quality. 100% private, no upload required.
Image Convert
Convert images between JPG, PNG, and WEBP formats in your browser. Batch conversion supported. 100% private, no upload required.
Image Crop
Crop images to exact dimensions in your browser. Supports preset ratios and custom sizes. 100% private, no upload required.
Image Resize
Resize JPG, PNG, and WEBP images to exact dimensions, percentages, or a max box - in your browser. Batch support, aspect ratio lock, 100% private.
Image Watermark
Add text or image watermarks to your images in the browser. Support multiple positions and batch processing. 100% private, no upload required.
JSON Formatter, Validator & Converter
Format, validate, and convert JSON to XML or YAML instantly in your browser. Supports minify and syntax checking. Free, 100% private.
JSON to CSV Converter
Convert JSON to CSV instantly in your browser. Nested JSON flattens into columns, arrays become rows. No upload, 100% private, free.
Loan & EMI Calculator
Calculate loan EMI, monthly payments, and amortization schedules instantly in your browser. Free tool, no data upload, 100% private.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text by paragraphs, sentences, or words. One-click copy, customizable count. Free and private.
Mortgage Calculator
Calculate your monthly mortgage payment with taxes, insurance, PMI, and extra payments. Full amortization schedule, free and private.
Password Generator
Generate strong, random passwords instantly in your browser. Customize length, characters, and check strength. Free, private, no sign up.
Percentage Calculator
Calculate percentages, discounts, markups, and VAT instantly in your browser. Free online tool, no data upload, 100% private.
QR Code Generator
Generate custom QR codes with logo, body shapes, and eye styles. Free, browser-based, 100% private — no data uploaded.
Random Number Generator
Generate random numbers in any range, with or without repeats. Pick a number between 1 and 100, roll dice, or pick lottery numbers - free and private.
Regex Tester — Test & Debug Regular Expressions Online
Test and debug regular expressions with real-time match highlighting, capture groups, replace mode, pattern explanation and a built-in library. 100% browser-based, free.
Salary Calculator
Convert your annual or monthly salary to hourly, weekly, and daily pay. See how much you've earned in real time. Free online tool, 100% private.
Sales Tax Calculator
Add or remove sales tax from any price. Enter net or gross amount and rate to get tax, total, and pre-tax price - free and 100% private.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds, live current timestamp. Free, private, no sign up.
Time Zone Converter
Convert time across time zones instantly. Compare world clocks, plan meetings, and calculate time differences. Free, private, no sign up.
Tip Calculator
Calculate tips and split the bill in seconds. Choose a percentage, set the party size, see per-person totals - free and 100% private.
Unit Converter
Convert length, weight, temperature, speed, volume, area, data, time, angle, pressure, energy and power units instantly in your browser. Free, private, no sign up.
UUID Generator
Generate UUID v1, v4, and bulk unique IDs instantly in your browser. Free GUID generator, 100% private — no data uploaded.
Word & Character Counter
Count words, characters, sentences, and paragraphs instantly. Estimate reading time and speaking time. Free online tool, 100% private.
Why ToolsMio?
Privacy First
All processing happens in your browser. We never see your data.
Instant Results
No waiting, no uploading. Get results the moment you type.
Free Forever
No sign up, no limits, no hidden fees. Every tool is free.
Multi-Language
Available in 11 languages with localized search tags.
Frequently Asked Questions
Are ToolsMio tools really free?
Yes, every tool on ToolsMio is completely free with no usage limits, no premium tiers, and no sign-up walls. The site is supported by non-intrusive advertising that never interferes with tool functionality.
Is my data safe when using these tools?
Your data never leaves your browser. All processing happens locally using client-side JavaScript — we physically cannot access your input. You can verify this yourself by opening your browser's Network tab (F12) while using any tool.
Do I need to create an account?
No. ToolsMio requires no registration, no email, and no personal information. Simply open a tool and start using it immediately.
What tools are available on ToolsMio?
ToolsMio offers 36 free online tools across eight categories: Text Tools, Developer Tools, Calculators, Converters, Generators, Image Tools, Health Tools, and Finance Tools. All run entirely in your browser - no sign-up, no data uploads.
Can I use ToolsMio tools for work or commercial purposes?
Absolutely. All tools are free to use for any purpose — personal, educational, or commercial. For critical calculations, we recommend verifying results independently as outlined in our Disclaimer.