Free online utility tools

Get useful work done online.

Calculate, convert, organize and optimize everyday files and information with simple browser-based tools. No account is required for the core utilities.

Tool library

All tools in one place

Choose a category or search for a specific utility.

Finance

💱

Currency Converter

Convert currencies with live reference rates when available.

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💼

Salary Calculator

Estimate monthly, weekly and hourly gross salary.

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🏦

Loan Calculator

Estimate monthly payments, total repayment and interest.

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🏷️

Discount Calculator

Calculate savings and final prices after discounts.

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🧾

VAT Calculator

Add or remove VAT and see the net, tax and gross amounts.

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📈

Compound Interest Calculator

Estimate growth from recurring compound interest.

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💹

Profit Margin Calculator

Calculate profit, margin, markup and break-even price.

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🍽️

Tip Calculator

Calculate tips and split a bill between people.

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Math

%

Percentage Calculator

Calculate percentages, increases, decreases and changes.

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Average Calculator

Calculate mean, median and common summary statistics.

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⚖️

Ratio Calculator

Scale ratios and calculate missing values.

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Time & Date

🌍

Time Zone Converter

Compare a time across major world time zones.

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📅

Date Difference Calculator

Calculate elapsed days between two dates.

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🎂

Age Calculator

Calculate your exact age in years, months and days.

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Document Converters

Converters

Unit Converter

Convert length, mass, temperature, volume and more.

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📏

Length Converter

Convert common metric and imperial length units.

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⚖️

Weight Converter

Convert kilograms, pounds, grams, ounces and more.

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🌡️

Temperature Converter

Convert Celsius, Fahrenheit and Kelvin.

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Area Converter

Convert square metres, feet, acres and more.

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💾

Data Storage Converter

Convert bytes, KB, MB, GB and TB.

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PDF Tools

📎

Merge PDF

Combine multiple PDF files into one PDF in your browser.

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✂️

Split PDF

Extract selected pages from a PDF into a new file.

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🗜️

Compress PDF

Reduce PDF size by rasterizing pages with adjustable quality.

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🖼️

Images to PDF

Turn JPG, PNG and other browser-readable images into a PDF.

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🖼️

PDF to Images

Render PDF pages as downloadable PNG images.

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🔄

Rotate PDF

Rotate selected PDF pages and download a new file.

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📄

Extract PDF Pages

Choose pages and create a new PDF from them.

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🔢

Add PDF Page Numbers

Add simple page numbers to a PDF.

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Image Tools

🗜️

Compress Image

Resize and compress JPG, PNG or WebP images in your browser.

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↔️

Resize Image

Resize an image by width, height or percentage.

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🔁

Convert Image

Convert browser-supported images to JPG, PNG or WebP.

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PDF and document tools

UniConvertHub includes browser-based PDF utilities for merging, extracting, rotating, converting and preparing documents. Files are processed locally in supported tools, so you can work without creating an account.

Built for practical everyday tasks

UniConvertHub brings common calculations, conversions and document utilities together in one place. Each tool is designed to give a clear input, a clear action and an understandable result.

Privacy-conscious by design

Core calculators run in the browser. PDF and image tools are designed around local browser processing where the browser APIs and libraries support it. Always review the privacy and security needs of sensitive documents before using any online tool.

Important limitations

Currency rates are informational and can differ from your bank or provider. Financial calculators are estimates, not professional financial advice. PDF processing depends on browser capabilities and the structure of a file. When a tool produces a downloadable file, check the result before relying on it.