Free · Private · No sign-up

Free online tools that run in your browser

PDF, image, privacy and money tools that work instantly. Your files and numbers stay on your device: nothing is uploaded, nothing is stored, and there are no daily limits.

✓ Files never leave your device
✓ No account, no watermarks
✓ Works on phone and desktop

Privacy & Security

Check your IP, your connection and suspicious links.

What Is My IP? on AultraVPN See the public IP address and location websites see. DNS Leak Test on AultraVPN Check whether your DNS requests leak outside your VPN. WebRTC Leak Test on AultraVPN Check whether your browser leaks your real IP via WebRTC. Password Generator on AultraVPN Create strong random passwords. Password Strength Checker on Aultra Tech See how long a password would take to crack.

PDF Tools

Merge, compress and convert PDFs in your browser.

All pdf tools →

Merge PDF Combine PDFs and images into one PDF, in your browser.

Image Tools

Compress, convert and resize photos privately.

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Compress Image Shrink JPG, PNG and WebP photos to any size, privately. HEIC to JPG Convert iPhone HEIC photos to JPG, keeping the date.

Money Calculators

Pay, tax and savings calculators for the US and UK.

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UK Take-Home Pay Calculator Your 2026/27 salary after tax, NI, pension and student loan.

Business Tools

Invoices, QR codes and fee calculators.

All business tools →

QR Code Generator Free QR codes that never expire. No sign-up.

Everyday Tools

Dates, ages, discounts, countdowns and more.

All everyday tools →

Discount Calculator Sale price, percent off and stacked Black Friday deals. Secret Santa Generator Draw names online with exclusions. No sign-up. Christmas Countdown Live countdown to Christmas Day in your time zone. Age Calculator Exact age in years, months and days.

Developer Tools

Formatters, encoders and testers for developers.

JSON Formatter on Aultra Tech Format and validate JSON. Base64 Encode/Decode on Aultra Tech Encode and decode Base64 text. UUID Generator on Aultra Tech Generate random UUIDs. Hash Generator on Aultra Tech SHA-256, SHA-1 and MD5 hashes. Regex Tester on Aultra Tech Test regular expressions live. JWT Decoder on Aultra Tech Decode JSON Web Tokens locally. Cron Expression Explainer on Aultra Tech Cron schedules in plain English. Unix Timestamp Converter on Aultra Tech Convert epoch time to dates.

Private by design

Most tools here process your files and numbers inside your own browser. Nothing is uploaded to a server, so there is nothing for anyone to keep, leak or sell.

No limits, no sign-up

No accounts, no watermarks and no “3 tasks per day”. Every tool is free to use as often as you like, on your phone or your computer.

Accurate and explained

Each tool comes with a plain-English guide. Our calculators use the current official rates, and every page shows when it was last checked.