About Toolgix

Toolgix is a collection of 78 precise, free tools for PDFs, images, text, code and everyday maths. They run in your browser, so your files and text stay on your device.

Why we built it

Most online tools upload your files to a server, cap how much you can do each day, and push you towards a subscription. That is a poor deal for documents like contracts, ID scans and payslips, and for developer data like tokens and configuration. Modern browsers are powerful enough to do this work themselves, so Toolgix does it there: no uploads, no sign-up, no artificial limits.

How "runs in your browser" works

When you open a tool, your browser downloads the tool’s code once. When you add a file, the browser reads it from your disk into its own memory and processes it with that code. The result is created in the same memory and saved with your browser’s normal download. There is no upload step and no copy on our side. You can check this yourself: see how to verify it.

How we build and test tools

• Every tool has automated tests with independent answers. Expected values come from published test vectors (for example RFC 4648 for Base64), published constants (exact unit definitions), hand calculations shown on the tool pages, or a second implementation. We do not test code against its own output.
• Every tool is tested in a real browser with real files before each release: PDFs are merged, split and re-opened, images are resized and measured, and downloads are checked.
• The privacy claim is tested. The same browser test fails if a tool sends any request other than loading its own code while it works.
• Accessibility is tested with axe-core against WCAG 2.2 AA in light and dark themes, on desktop and phone sizes, plus keyboard checks.
• Methods and limits are written down on every tool page: the formula or algorithm, a worked example and what the tool cannot do.

If you find a wrong result, please tell us. We fix confirmed errors quickly and add a test so they cannot come back.

Independence and money

Toolgix is free and is funded by advertising and, for businesses, by paid branded versions of our calculators (calculators for your website). Ads never appear inside the tools themselves, and we never sell data, because we do not collect it.

What we cover

• PDF tools: Combine, split, shrink and tidy PDF documents without sending them anywhere.
• Image tools: Shrink photos for upload limits, resize for social media, convert formats and crop.
• Text tools: Everyday text clean-up for writers, students, marketers and anyone working with lists.
• Developer tools: Formatters, converters, encoders and generators for daily development work.
• Design & color: Small, exact tools for designers and front-end developers: color conversion, accessibility contrast checks, palettes from images and favicon sets ready for any site..
• SEO & marketing: Tools for getting pages found and links tracked: meta tags with a search-result preview, campaign URLs, robots.txt rules, clean slugs, and static QR codes and barcodes that never expire..
• Privacy & security: Practical privacy tools that never send your data anywhere: strong random passwords, honest strength checks, metadata removal from photos and a safe QR code checker..
• Calculators & converters: Everyday math with the method shown: loans and EMIs with full amortization, compound growth, VAT and margins in any currency, dates, ages, units and time zones..
• Home & DIY calculators: Know how much to buy before you start the job.

Open-source software we build on

Toolgix stands on excellent open-source projects. Thank you to their authors.

Contact

Email hello@toolgix.com. We read every message.