Free tools

Formatters, calculators and checkers that run in your browser. Nothing you type is sent to this site.

These are the small jobs that come up all day: tidy a JSON file, convert a timestamp, work out a subnet, test a regular expression, make a password or a QR code. Each tool does one job and says plainly what it does with your input. Files and text are processed on your device and are not uploaded to this site.

Which tool for which job?

My JSON, YAML or SQL is a mess

Use the JSON formatter, YAML formatter or SQL formatter. They also report a syntax error.

I need to convert data

CSV to JSON, JSON to CSV, XML to JSON, JSON to TypeScript and HTML to Markdown.

I need to plan or check a network

The subnet calculator, CIDR to IP range, IPv6 expander and common ports list.

A server returned a number or a cron job will not run

Look the number up in the HTTP status code list. Read a schedule with the cron explainer, and set file permissions with the chmod calculator.

I need a secure value

Make one with the password generator or UUID generator, check one with the password strength checker, and inspect a token with the JWT decoder.

I work with dates and times

The Unix timestamp converter, time zone converter and date difference calculator.

I need to shrink or convert an image or a page

The image resizer, image to Base64, CSS minifier and JavaScript minifier.

How the tools handle your data

Every tool runs in your browser with the page’s own code. Nothing you paste or open is uploaded. You can check this: load a tool, switch off your internet connection and it keeps working. Results are only as good as the input, so check anything important before you rely on it. If a tool gives a wrong answer, please tell us.

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