About ToolBig
Free, browser-based tools that just work.
ToolBig started with a simple frustration: most free online tools are slow, cluttered, and ask you to upload private files to unknown servers. The everyday utilities people rely on deserved better.
So we built ToolBig — an independent, growing collection of 91 free tools across 10 categories: calculators and converters, PDF and image utilities, text and developer helpers, and a full SEO toolkit. No accounts, no paywalls.
How it works
The large majority of ToolBig’s tools run entirely in your browser. When you compress a PDF, convert an image or format JSON, the file or text is processed on your device and is never sent to us — which makes ToolBig genuinely safe for confidential documents.
A few tools need an external service to work, and we say so on the tool itself. For example, the currency converter fetches live exchange rates from a public rates API, and OCR downloads a one-time open-source language model. We never claim a tool is fully local when it isn’t.
How we keep it free
ToolBig is funded by advertising, shown through Google AdSense. We keep ads out of the way of the tools themselves, and we don’t place them on thin pages. You can read exactly what we collect and how ads and cookies work in our privacy policy.
Our principles
Fast
Most tools run the moment you open them — no queues, no processing servers.
Private
Tools that handle your files process them in your browser; those files never leave your device.
Free
No sign-up, no watermarks, no hidden limits. Kept free by unobtrusive ads.
Honest
Every tool describes exactly what it does — and where it uses an external service, it says so.
Get in touch
ToolBig is independently operated. Questions, bug reports or a tool you’d like us to build? Email hello@toolbig.com or use the contact page — we read everything.