Free text to speech and other online tools
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Text to SpeechHot
Natural voices, subtitles and multi-voice dialogues, with AI.
AI Video MakerHot
Videos and quick ads from a topic: script, voice, subtitles and scenes.
Unit Converter
Convert kilometers to miles, Celsius to Fahrenheit, and more.
Currency Converter
Convert between 70+ currencies at daily rates: ECB reference rates plus market rates for the rest.
Percentage Calculator
Find what percent of a number is, what percentage one value is of another, or calculate percentage change instantly.
Compress Image
Smaller JPG, PNG and WebP files with adjustable quality.
Merge PDF
Combine several PDFs into one, in any order.
Days Between Dates
Count the days, weeks, months and business days between any two dates.
Age Calculator
Find your exact age in years, months and days, and the countdown to your next birthday.
QR Code Generator
Create QR codes for links, text, Wi-Fi, e-mail, phone and WhatsApp. Download PNG or SVG.
Password Generator
Generate strong, random passwords using your browser's cryptographic API. Choose length and character types.
Word Counter
Count words, characters, sentences and reading time, and check social media and SEO limits.
BMI Calculator
Calculate your Body Mass Index in metric or imperial units and see your weight category instantly.
Discount Calculator
Find the sale price and how much you save, with one or two discounts, or work back to the original price.
Image Converter
PNG, JPG and WebP in any direction, in bulk.
Rule of Three
Solve direct and inverse proportions step by step.
JSON Formatter
Format, minify and validate JSON and find syntax errors by line and column.
Convert Case
Quickly change your text between various formats: all uppercase, all lowercase, etc. Take advantage of our character, sentence, paragraph, and line counters.
Advanced Calculator
Perform complex calculations with scientific functions and calculation history.
Simple Interest Calculator
Calculate simple interest per month or per year for loans and investments.
Compound Interest Calculator
Simulate how your money grows over time with compound interest.
Date Calculator
Find out what date it will be in the future or what date it was in the past. Perfect for planning and scheduling.
Password Leak Checker
Check if a password appeared in data breaches without sending it, plus a strength estimate.
Base64 Encoder
Encode text to Base64 or decode it back, with full UTF-8 and URL-safe support.
URL Encoder
Percent-encode or decode URLs and query strings safely, for a component or a full URL.
UUID Generator
Generate random v4 or time-ordered v7 UUIDs, one or in bulk.
Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text and compare them.
Unix Timestamp
Epoch time to a date and back, in seconds or milliseconds.
Color Converter
HEX, RGB, HSL, CMYK and OKLCH with WCAG contrast.
Regex Tester
Test regular expressions with highlighted matches and groups.
Text Compare
See what changed between two texts, by line or word.
AI Summarizer
Summarize texts and PDFs in seconds with AI.
Paraphrasing Tool
Rewrite a text with other words, keeping the meaning.
Grammar Checker
Fix spelling, grammar and punctuation with AI.
Tone Changer
Make a text formal, friendly, persuasive or simple.
Split PDF
Extract, delete or rotate pages, or split into single pages.
Images to PDF
JPG, PNG and WebP images into one PDF.
Ad Maker
A sale post, property or job ad with your photo, ready to download.
Resize Image
Exact pixels or a percentage, proportions kept.
Crypto Prices
Bitcoin, Ethereum and the top 20 cryptocurrencies in your currency, with change and charts.
Tip Calculator
Work out the tip and split the bill between any number of people.
Statistics Calculator
Mean, median, mode, standard deviation, variance and quartiles for a list of numbers.
Time Zone Converter
Convert a date and time between world time zones, with daylight saving handled for you.
Average Calculator
Simple and weighted averages and the grade you need to pass.
Day of the Week
Which day of the week any date falls on, with the ISO week.
Public Holidays
Public holidays of 200+ countries with weekdays, long weekends and regional days off.
Popular conversions
Welcome to UtilLab - Your All-in-One Online Tools Platform
Why Choose UtilLab?
There are many general-purpose utility sites out there, but UtilLab is built with a focus on depth, accuracy, and clarity. Here is what makes it different:
Deep Unit Converter with Context
Our unit converter goes beyond just showing a number. Every conversion page includes the exact formula, a reference table with common values, the definition and history of each unit, and a FAQ section. Whether you are converting millimeters to inches or kilowatts to horsepower, you leave the page understanding the units, not just the result.
Financial Calculators That Explain the Math
The simple interest and compound interest calculators show you not just the final amount, but how the value changes over time. Adjust the principal, rate, and period to see how each variable affects the outcome. These tools are useful for students learning financial mathematics, as well as anyone planning a loan or investment.
Fast, Private, and Always Free
Almost every UtilLab tool runs directly in your browser: what you type is not sent to our servers. The only exception is Text to Speech, which turns your text into audio on our server and needs a free account; even there, the audio is not kept. The tools are free and will remain free.
UtilLab is a free platform offering a growing collection of practical online tools built for everyday use. Whether you need to convert kilometers to miles, calculate compound interest on an investment, find out how many days until an event, or change the case of a block of text, UtilLab has a dedicated tool for the job. Every tool is designed to run entirely in your browser — no downloads, no accounts, no waiting.