About ToolsSonic

ToolsSonic is a collection of 104 professional developer, AI, and text tools that run entirely inside your browser. No uploads. No accounts. No tracking of what you paste.

Why we built it

Most online tool sites work the same way: you paste your data into a box, it travels to somebody else's server, and you hope for the best. That is fine for a lorem ipsum generator. It is not fine for a production API response, a customer CSV, a JSON Web Token, or a config file with credentials in it.

We think the browser is already powerful enough to do this work. Modern JavaScript engines, the Web Crypto API, and Web Workers can format, validate, convert, hash, and analyse data as fast as any server round-trip — often faster, because there is no network hop. So we built every tool to run locally, and we made that promise verifiable rather than asking you to trust a policy page.

Private by architecture, not by policy

A privacy policy is a promise. An architecture is a fact. ToolsSonic has no upload endpoint for your content, no user accounts, and no analytics that read what you type. You can confirm this yourself in about ten seconds:

1. Open your browser's developer tools and select the Network tab.
2. Open any ToolsSonic tool and paste something into it.
3. Watch the request list. Your content generates no requests, because there is nowhere for it to go.

Several of our tools show this live on the page: a counter reads your browser's own Performance log and reports how many network requests have happened since you started typing. For a local tool, that number stays at zero.

How we build tools

Every tool follows the same standard before it ships: it must be correct on the edge cases that break other tools, accessible by keyboard and screen reader, fast on mobile, honest in what it claims, and genuinely useful rather than a thin wrapper around one line of code.

• Correctness first. Our JSON engine preserves integers beyond 2⁵³, keeps 1e400 intact instead of turning it into null, and retains duplicate keys that most formatters silently discard.
• Real cryptography. JWT signature verification and HMAC use the browser's built-in Web Crypto API, verified in our test suite against real signed tokens.
• No dark patterns. No feature is locked behind a sign-up, no result is hidden behind a paywall, and nothing you create is made public without you choosing to share it.
• Honest limits. When a tool cannot do something, it says so plainly instead of guessing. Unsupported algorithms are refused with an explanation, never reported as valid.

What ToolsSonic is not

We are not a cloud service, and we do not want your data. There is no storage of your content on our side because there is no transmission of it in the first place. Anything a tool remembers — recent inputs, saved snippets, your theme choice — is stored by your own browser and disappears when you clear site data.

Who is behind it

ToolsSonic is an independent project, built and maintained by a small team of developers who were tired of choosing between convenience and privacy. We fund development without selling data, and we intend to keep the tools free to use.

Have a bug report, a tool request, or a correction? Get in touch — we read everything.