About
Eight small tools that run entirely in the page. Nothing is uploaded, which is the reason to use them on a production API response or a list of real addresses rather than pasting that material into a site that processes it on a server.
Local processing, and what it actually buys you
The value is not speed, it is that sensitive material never leaves the machine. An API response with customer records, a cookie jar that is a live session, a header from a suspicious message: all of these are things you should hesitate to paste into a website. Running the transformation in the page removes that hesitation, and it is why these tools are worth using over a server side equivalent.
The combinations that come up
Cleaning a list then converting it to a table is the common pair, and it turns a pasted mess into something a spreadsheet accepts. When debugging an API, the formatter shows the structure, the URL coder handles the query parameters, and the timestamp converter reads the expiry inside a token. Each is small on its own and the sequence is what saves the afternoon.
Clear the box afterwards
Two of these hold things worth clearing. A cookie paste is usually a live session that would sign someone in. A note persists in the browser until something removes it. Neither is transmitted anywhere, and neither disappears on its own either, so on a shared machine the last step is emptying the field.
FAQ
Is any of this sent to a server?
No. JSON, URL encoding, timestamps, user agents, cookies, list cleaning, tables and notes all run in your browser.
Why does the tab slow down on a large input?
Because your browser is doing the work. A very large document or a list of hundreds of thousands of lines competes for the memory that tab has, and that is a local limit rather than a quota.
Is a shared note private?
It is unlisted rather than private. The text travels inside the link, so anyone holding the link can read it.
Related tools
Format JSON, encode URLs, convert timestamps, parse a user agent, convert cookies, clean lists and build tables. All of it runs in your browser.