Free online tools that never upload your files

Converters, PDF tools and live trackers from Secure Software that run entirely in your browser. There is no account and no install, and your files and your location are never sent to our server - the work happens on your own device.

Files & documents

HEIC to JPG Converter preview Private

HEIC to JPG Converter

Turn HEIC photos from an iPhone into JPG, PNG or WebP in batches. Decoded in your browser with WebAssembly - nothing is uploaded, and location metadata is removed. Open HEIC to JPG Converter → Merge PDF preview Private

Merge PDF

Combine PDF files into one, put them in order and choose which pages to keep. The files are joined on your device and never sent anywhere. Open Merge PDF → Compress PDF preview Private

Compress PDF

Make a PDF small enough to email or upload by re-encoding the photos inside it, while the text stays sharp and searchable. Done in your browser. Open Compress PDF → Invoice Generator preview Free

Invoice Generator

Fill in a form, see the invoice take shape and download a print-ready PDF. Any currency, tax and discount; your details stay in this browser. Open Invoice Generator →

Space & satellites

Live Satellite Tracker preview Live

Live Satellite Tracker

Every tracked satellite, Starlink train and piece of debris moving in real time around a 3D Earth. Search any NORAD number and follow it round the planet. Open Live Satellite Tracker → ISS Tracker preview Live

ISS Tracker

The International Space Station's live position, speed and altitude, and the next passes over your city that you can see with the naked eye. Open ISS Tracker → Satellites Overhead Now preview Live

Satellites Overhead Now

Every object above your horizon right now, with the direction to look, how high it is and whether the Sun is lighting it. Open Satellites Overhead Now →

Developer tools

Regex Tester preview Free

Regex Tester

Write a regular expression and watch every match, group and replacement update as you type, with flags, a pattern library and links you can share. Open Regex Tester →

Why these run in your browser

Most free converters upload your file to a server, process it there and send it back - which means a copy of your photos, contracts or invoices passes through someone else's machine. Every tool here does the work on your own device instead: HEIC photos are decoded with a WebAssembly build of libheif, PDFs are taken apart and rebuilt in JavaScript, and nothing is sent anywhere. You can disconnect from the internet after the page loads and they keep working.

The satellite trackers download a catalogue signed with Ed25519, check that signature and every byte of the download in your browser, and only then calculate where each object is with the same SGP4 model the space industry uses.

When you need more

Each tool has a full app behind it for batches, offline work and the jobs a browser cannot do: HEIC to JPG Batch Converter for Mac, PDF Maker and Invoice Maker for iPhone, iPad and Mac, Regex Tool for Mac and Orbit Map on every Apple device.