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Developer

3 free tools

Format code, encode data and create secure values.

Small tools for developers and everyone else

These tools cover jobs that come up every day when building websites and apps, and a few that are just as useful for anyone. Everything runs in your browser. JSON you paste and passwords you generate are never sent to a server, which matters when the data is private.

The tools

  • JSON Formatter validates JSON, points to the line and column of any error, and formats or minifies it.
  • QR Code Generator makes QR codes for links, text, Wi-Fi networks, phone numbers and WhatsApp chats, ready to download as PNG or SVG.
  • Password Generator creates strong random passwords with your choice of length and character types.

Why browser-based matters here

Pasting an API response or a config file into an online formatter can expose keys and personal data if the site logs what it receives. The JSON Formatter never sends your input anywhere. The Password Generator uses your browser's secure random number generator, the same source that encryption software relies on, rather than a predictable formula.

Frequently asked questions

Is it safe to paste private JSON here?

Yes. The JSON Formatter works entirely in your browser and does not send or store what you paste.

Do the QR codes expire?

No. The QR code holds your link or text directly, so it keeps working for as long as the link itself works. There is no redirect through our site.

How random are the generated passwords?

They come from the Web Crypto API, the cryptographically secure random source built into modern browsers, so they cannot be predicted or reproduced.

Can I make a QR code for my Wi-Fi?

Yes. Choose Wi-Fi, enter the network name, password and security type, and guests can join by scanning the code instead of typing the password.

Can’t find the tool you need?

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